./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_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/safe005_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe005_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe005_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-76401ed-m [2024-06-20 15:13:39,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:13:39,206 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:13:39,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:13:39,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:13:39,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:13:39,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:13:39,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:13:39,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:13:39,240 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:13:39,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:13:39,240 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:13:39,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:13:39,242 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:13:39,242 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:13:39,243 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:13:39,243 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:13:39,243 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:13:39,243 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:13:39,243 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:13:39,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:13:39,244 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:13:39,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:13:39,244 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:13:39,245 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:13:39,245 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:13:39,245 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:13:39,245 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:13:39,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:13:39,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:13:39,247 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:13:39,247 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:13:39,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:39,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:13:39,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:13:39,248 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:13:39,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:13:39,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:13:39,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:13:39,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:13:39,249 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:13:39,249 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:13:39,249 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:13:39,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:13:39,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:13:39,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:13:39,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:13:39,511 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:13:39,511 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:13:39,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe005_tso.yml/witness.yml [2024-06-20 15:13:39,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:13:39,661 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:13:39,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-20 15:13:40,796 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:13:41,002 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:13:41,002 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-20 15:13:41,026 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3295dbe62/75403578f89b47818966e80e7ed1226c/FLAGfaa602fc6 [2024-06-20 15:13:41,039 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3295dbe62/75403578f89b47818966e80e7ed1226c [2024-06-20 15:13:41,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:13:41,040 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:13:41,042 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:41,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:13:41,046 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:13:41,047 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:39" (1/2) ... [2024-06-20 15:13:41,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3117d763 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:41, skipping insertion in model container [2024-06-20 15:13:41,048 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:39" (1/2) ... [2024-06-20 15:13:41,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3af600bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:41, skipping insertion in model container [2024-06-20 15:13:41,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:41" (2/2) ... [2024-06-20 15:13:41,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3117d763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41, skipping insertion in model container [2024-06-20 15:13:41,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:41" (2/2) ... [2024-06-20 15:13:41,050 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:13:41,082 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:13:41,084 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:13:41,084 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:13:41,084 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 <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-20 15:13:41,085 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:13:41,085 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-20 15:13:41,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:13:41,422 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:41,429 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:13:41,502 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:41,532 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:13:41,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41 WrapperNode [2024-06-20 15:13:41,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:41,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:41,534 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:13:41,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:13:41,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,568 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,604 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-20 15:13:41,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:41,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:13:41,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:13:41,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:13:41,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,622 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,632 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]. [2024-06-20 15:13:41,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,633 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,643 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,645 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,645 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,647 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:13:41,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:13:41,648 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:13:41,648 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:13:41,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (1/1) ... [2024-06-20 15:13:41,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:41,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:13:41,681 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) [2024-06-20 15:13:41,690 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 [2024-06-20 15:13:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:13:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:13:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:13:41,723 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:13:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:13:41,723 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:13:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:13:41,724 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:13:41,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:13:41,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:13:41,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:13:41,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:13:41,725 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:13:41,812 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:13:41,814 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:13:41,973 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:13:41,974 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:13:42,042 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:13:42,043 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:13:42,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:42 BoogieIcfgContainer [2024-06-20 15:13:42,043 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:13:42,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:13:42,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:13:42,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:13:42,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:39" (1/4) ... [2024-06-20 15:13:42,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544b5afa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:42, skipping insertion in model container [2024-06-20 15:13:42,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:13:41" (2/4) ... [2024-06-20 15:13:42,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544b5afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:42, skipping insertion in model container [2024-06-20 15:13:42,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:41" (3/4) ... [2024-06-20 15:13:42,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544b5afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:42, skipping insertion in model container [2024-06-20 15:13:42,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:42" (4/4) ... [2024-06-20 15:13:42,049 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_tso.i [2024-06-20 15:13:42,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:13:42,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:13:42,063 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:13:42,099 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:13:42,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:13:42,148 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 15:13:42,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:42,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:13:42,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:13:42,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 15:13:42,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:13:42,163 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;@5813007b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:13:42,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:13:42,166 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:13:42,166 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:13:42,166 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:42,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:42,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:13:42,167 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)] === [2024-06-20 15:13:42,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-20 15:13:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:42,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711321724] [2024-06-20 15:13:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:42,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:42,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711321724] [2024-06-20 15:13:42,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711321724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:42,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:42,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:13:42,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058379651] [2024-06-20 15:13:42,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:42,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:13:42,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:42,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:13:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:13:42,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-20 15:13:42,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:42,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-20 15:13:42,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:42,834 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-20 15:13:42,835 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 15:13:42,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-20 15:13:42,846 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 15:13:42,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-20 15:13:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:13:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:13:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-20 15:13:42,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-20 15:13:42,860 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-20 15:13:42,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-20 15:13:42,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:42,866 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 15:13:42,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 15:13:42,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 15:13:42,871 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 15:13:42,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:42,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:13:42,872 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)] === [2024-06-20 15:13:42,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-20 15:13:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:42,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031613602] [2024-06-20 15:13:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:42,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031613602] [2024-06-20 15:13:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031613602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:13:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237313165] [2024-06-20 15:13:43,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:13:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:13:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:13:43,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:13:43,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:13:43,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,291 INFO L124 PetriNetUnfolderBase]: 724/1188 cut-off events. [2024-06-20 15:13:43,292 INFO L125 PetriNetUnfolderBase]: For 255/289 co-relation queries the response was YES. [2024-06-20 15:13:43,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 1188 events. 724/1188 cut-off events. For 255/289 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6052 event pairs, 401 based on Foata normal form. 3/1156 useless extension candidates. Maximal degree in co-relation 2706. Up to 1090 conditions per place. [2024-06-20 15:13:43,300 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-20 15:13:43,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 248 flow [2024-06-20 15:13:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-20 15:13:43,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-20 15:13:43,302 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 110 transitions. [2024-06-20 15:13:43,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 248 flow [2024-06-20 15:13:43,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:43,304 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-20 15:13:43,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-20 15:13:43,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-20 15:13:43,305 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-20 15:13:43,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:13:43,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:43,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,307 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-20 15:13:43,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882629647] [2024-06-20 15:13:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882629647] [2024-06-20 15:13:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882629647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:13:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693926362] [2024-06-20 15:13:43,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:13:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:13:43,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:13:43,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-20 15:13:43,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-20 15:13:43,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,578 INFO L124 PetriNetUnfolderBase]: 632/1065 cut-off events. [2024-06-20 15:13:43,579 INFO L125 PetriNetUnfolderBase]: For 588/681 co-relation queries the response was YES. [2024-06-20 15:13:43,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 1065 events. 632/1065 cut-off events. For 588/681 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5424 event pairs, 334 based on Foata normal form. 2/1024 useless extension candidates. Maximal degree in co-relation 2722. Up to 968 conditions per place. [2024-06-20 15:13:43,585 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2024-06-20 15:13:43,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 276 flow [2024-06-20 15:13:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-20 15:13:43,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-20 15:13:43,587 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 109 transitions. [2024-06-20 15:13:43,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 276 flow [2024-06-20 15:13:43,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 274 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:43,589 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 193 flow [2024-06-20 15:13:43,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-20 15:13:43,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-20 15:13:43,590 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 193 flow [2024-06-20 15:13:43,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:13:43,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:43,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-20 15:13:43,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627839358] [2024-06-20 15:13:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627839358] [2024-06-20 15:13:43,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627839358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140915928] [2024-06-20 15:13:43,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:43,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:43,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:43,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 193 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) [2024-06-20 15:13:43,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:43,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,958 INFO L124 PetriNetUnfolderBase]: 908/1468 cut-off events. [2024-06-20 15:13:43,959 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2024-06-20 15:13:43,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4142 conditions, 1468 events. 908/1468 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7260 event pairs, 290 based on Foata normal form. 6/1462 useless extension candidates. Maximal degree in co-relation 4124. Up to 1315 conditions per place. [2024-06-20 15:13:43,967 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-20 15:13:43,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 407 flow [2024-06-20 15:13:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:13:43,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:13:43,971 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 193 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:13:43,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 407 flow [2024-06-20 15:13:43,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:43,976 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 233 flow [2024-06-20 15:13:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-20 15:13:43,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-20 15:13:43,978 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 233 flow [2024-06-20 15:13:43,978 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) [2024-06-20 15:13:43,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:13:43,979 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:43,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-20 15:13:43,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772186210] [2024-06-20 15:13:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772186210] [2024-06-20 15:13:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772186210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:44,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:44,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:44,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496783228] [2024-06-20 15:13:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:44,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:44,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:44,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:44,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:44,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:44,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,302 INFO L124 PetriNetUnfolderBase]: 917/1512 cut-off events. [2024-06-20 15:13:44,313 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2024-06-20 15:13:44,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1512 events. 917/1512 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7655 event pairs, 320 based on Foata normal form. 4/1511 useless extension candidates. Maximal degree in co-relation 4561. Up to 1318 conditions per place. [2024-06-20 15:13:44,322 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2024-06-20 15:13:44,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 467 flow [2024-06-20 15:13:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:13:44,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:13:44,337 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 233 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:13:44,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 467 flow [2024-06-20 15:13:44,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:44,341 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 306 flow [2024-06-20 15:13:44,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-20 15:13:44,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-20 15:13:44,342 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 306 flow [2024-06-20 15:13:44,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:13:44,342 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)] === [2024-06-20 15:13:44,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2000396091, now seen corresponding path program 1 times [2024-06-20 15:13:44,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010565160] [2024-06-20 15:13:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:44,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:44,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010565160] [2024-06-20 15:13:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010565160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:44,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:44,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521744498] [2024-06-20 15:13:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:44,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:44,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:44,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:44,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:44,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:44,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,636 INFO L124 PetriNetUnfolderBase]: 928/1533 cut-off events. [2024-06-20 15:13:44,637 INFO L125 PetriNetUnfolderBase]: For 3308/3311 co-relation queries the response was YES. [2024-06-20 15:13:44,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5231 conditions, 1533 events. 928/1533 cut-off events. For 3308/3311 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7767 event pairs, 341 based on Foata normal form. 2/1529 useless extension candidates. Maximal degree in co-relation 5209. Up to 1325 conditions per place. [2024-06-20 15:13:44,647 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-20 15:13:44,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 561 flow [2024-06-20 15:13:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-20 15:13:44,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-20 15:13:44,649 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 306 flow. Second operand 5 states and 134 transitions. [2024-06-20 15:13:44,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 561 flow [2024-06-20 15:13:44,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 529 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:44,654 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 370 flow [2024-06-20 15:13:44,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-06-20 15:13:44,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-20 15:13:44,655 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 370 flow [2024-06-20 15:13:44,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:13:44,656 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)] === [2024-06-20 15:13:44,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2119657435, now seen corresponding path program 2 times [2024-06-20 15:13:44,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245167911] [2024-06-20 15:13:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245167911] [2024-06-20 15:13:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245167911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:44,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:44,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210358409] [2024-06-20 15:13:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:44,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:44,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:44,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:44,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:44,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,947 INFO L124 PetriNetUnfolderBase]: 915/1510 cut-off events. [2024-06-20 15:13:44,947 INFO L125 PetriNetUnfolderBase]: For 3810/3810 co-relation queries the response was YES. [2024-06-20 15:13:44,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5269 conditions, 1510 events. 915/1510 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7612 event pairs, 336 based on Foata normal form. 4/1509 useless extension candidates. Maximal degree in co-relation 5245. Up to 1312 conditions per place. [2024-06-20 15:13:44,958 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 51 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-20 15:13:44,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 546 flow [2024-06-20 15:13:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:13:44,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-20 15:13:44,959 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 370 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:13:44,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 546 flow [2024-06-20 15:13:44,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 523 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:44,965 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 393 flow [2024-06-20 15:13:44,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-20 15:13:44,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-20 15:13:44,965 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 393 flow [2024-06-20 15:13:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:13:44,966 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)] === [2024-06-20 15:13:44,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1439162230, now seen corresponding path program 1 times [2024-06-20 15:13:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416096988] [2024-06-20 15:13:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416096988] [2024-06-20 15:13:45,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416096988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625717865] [2024-06-20 15:13:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:45,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:45,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 393 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) [2024-06-20 15:13:45,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:45,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,283 INFO L124 PetriNetUnfolderBase]: 924/1521 cut-off events. [2024-06-20 15:13:45,284 INFO L125 PetriNetUnfolderBase]: For 4814/4814 co-relation queries the response was YES. [2024-06-20 15:13:45,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 1521 events. 924/1521 cut-off events. For 4814/4814 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7614 event pairs, 306 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 5410. Up to 1291 conditions per place. [2024-06-20 15:13:45,294 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2024-06-20 15:13:45,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 617 flow [2024-06-20 15:13:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:13:45,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 15:13:45,296 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 393 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:13:45,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 617 flow [2024-06-20 15:13:45,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 588 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:45,302 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 442 flow [2024-06-20 15:13:45,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=442, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-20 15:13:45,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-20 15:13:45,303 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 442 flow [2024-06-20 15:13:45,303 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) [2024-06-20 15:13:45,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:45,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:45,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:13:45,304 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)] === [2024-06-20 15:13:45,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1769449510, now seen corresponding path program 1 times [2024-06-20 15:13:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:45,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081875096] [2024-06-20 15:13:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081875096] [2024-06-20 15:13:45,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081875096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:45,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383401526] [2024-06-20 15:13:45,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:45,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:45,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:45,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:45,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 442 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) [2024-06-20 15:13:45,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:45,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,665 INFO L124 PetriNetUnfolderBase]: 935/1546 cut-off events. [2024-06-20 15:13:45,666 INFO L125 PetriNetUnfolderBase]: For 5859/5859 co-relation queries the response was YES. [2024-06-20 15:13:45,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 1546 events. 935/1546 cut-off events. For 5859/5859 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7788 event pairs, 308 based on Foata normal form. 2/1546 useless extension candidates. Maximal degree in co-relation 5832. Up to 1378 conditions per place. [2024-06-20 15:13:45,675 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 72 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-06-20 15:13:45,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 696 flow [2024-06-20 15:13:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:13:45,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:13:45,677 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 442 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:13:45,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 696 flow [2024-06-20 15:13:45,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 642 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:45,683 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 448 flow [2024-06-20 15:13:45,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=448, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-20 15:13:45,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-20 15:13:45,684 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 448 flow [2024-06-20 15:13:45,684 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) [2024-06-20 15:13:45,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:45,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:45,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:13:45,685 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)] === [2024-06-20 15:13:45,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash -455521062, now seen corresponding path program 2 times [2024-06-20 15:13:45,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:45,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213804771] [2024-06-20 15:13:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:45,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213804771] [2024-06-20 15:13:45,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213804771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:45,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702747654] [2024-06-20 15:13:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:45,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:45,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:45,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:45,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 448 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) [2024-06-20 15:13:45,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:45,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,973 INFO L124 PetriNetUnfolderBase]: 962/1588 cut-off events. [2024-06-20 15:13:45,974 INFO L125 PetriNetUnfolderBase]: For 7275/7278 co-relation queries the response was YES. [2024-06-20 15:13:45,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6261 conditions, 1588 events. 962/1588 cut-off events. For 7275/7278 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8027 event pairs, 308 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 6233. Up to 1299 conditions per place. [2024-06-20 15:13:45,984 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 32 changer transitions 0/104 dead transitions. [2024-06-20 15:13:45,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 854 flow [2024-06-20 15:13:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 15:13:45,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-20 15:13:45,986 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 448 flow. Second operand 6 states and 161 transitions. [2024-06-20 15:13:45,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 854 flow [2024-06-20 15:13:45,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 818 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:45,994 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 570 flow [2024-06-20 15:13:45,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-20 15:13:45,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-20 15:13:45,995 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 570 flow [2024-06-20 15:13:45,995 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) [2024-06-20 15:13:45,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:45,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:45,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:13:45,995 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)] === [2024-06-20 15:13:45,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash 705318268, now seen corresponding path program 3 times [2024-06-20 15:13:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:45,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322300737] [2024-06-20 15:13:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:45,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322300737] [2024-06-20 15:13:46,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322300737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:46,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615559367] [2024-06-20 15:13:46,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:46,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:46,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 570 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) [2024-06-20 15:13:46,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:46,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,292 INFO L124 PetriNetUnfolderBase]: 952/1570 cut-off events. [2024-06-20 15:13:46,293 INFO L125 PetriNetUnfolderBase]: For 9007/9007 co-relation queries the response was YES. [2024-06-20 15:13:46,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6628 conditions, 1570 events. 952/1570 cut-off events. For 9007/9007 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7951 event pairs, 306 based on Foata normal form. 4/1566 useless extension candidates. Maximal degree in co-relation 6599. Up to 1291 conditions per place. [2024-06-20 15:13:46,304 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 29 changer transitions 0/99 dead transitions. [2024-06-20 15:13:46,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 844 flow [2024-06-20 15:13:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:13:46,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-20 15:13:46,305 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 570 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:13:46,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 844 flow [2024-06-20 15:13:46,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 802 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:46,316 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 595 flow [2024-06-20 15:13:46,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=595, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-20 15:13:46,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-20 15:13:46,317 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 595 flow [2024-06-20 15:13:46,317 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) [2024-06-20 15:13:46,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:13:46,317 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)] === [2024-06-20 15:13:46,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1881521801, now seen corresponding path program 1 times [2024-06-20 15:13:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737870641] [2024-06-20 15:13:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737870641] [2024-06-20 15:13:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737870641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:46,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211640332] [2024-06-20 15:13:46,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:46,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:46,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:46,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 595 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:46,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,628 INFO L124 PetriNetUnfolderBase]: 963/1591 cut-off events. [2024-06-20 15:13:46,628 INFO L125 PetriNetUnfolderBase]: For 10330/10330 co-relation queries the response was YES. [2024-06-20 15:13:46,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 1591 events. 963/1591 cut-off events. For 10330/10330 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8109 event pairs, 307 based on Foata normal form. 2/1585 useless extension candidates. Maximal degree in co-relation 6856. Up to 1351 conditions per place. [2024-06-20 15:13:46,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 61 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-20 15:13:46,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 843 flow [2024-06-20 15:13:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 15:13:46,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-20 15:13:46,640 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 595 flow. Second operand 5 states and 131 transitions. [2024-06-20 15:13:46,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 843 flow [2024-06-20 15:13:46,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 768 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:46,649 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 629 flow [2024-06-20 15:13:46,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=629, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-06-20 15:13:46,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-20 15:13:46,650 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 629 flow [2024-06-20 15:13:46,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:13:46,651 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)] === [2024-06-20 15:13:46,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1129250393, now seen corresponding path program 2 times [2024-06-20 15:13:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686947529] [2024-06-20 15:13:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686947529] [2024-06-20 15:13:46,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686947529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309581405] [2024-06-20 15:13:46,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:46,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:46,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:46,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:46,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 629 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:46,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,967 INFO L124 PetriNetUnfolderBase]: 974/1612 cut-off events. [2024-06-20 15:13:46,967 INFO L125 PetriNetUnfolderBase]: For 11759/11759 co-relation queries the response was YES. [2024-06-20 15:13:46,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7076 conditions, 1612 events. 974/1612 cut-off events. For 11759/11759 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8246 event pairs, 307 based on Foata normal form. 2/1606 useless extension candidates. Maximal degree in co-relation 7044. Up to 1315 conditions per place. [2024-06-20 15:13:46,977 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 35 changer transitions 0/105 dead transitions. [2024-06-20 15:13:46,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 958 flow [2024-06-20 15:13:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:13:46,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:13:46,979 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 629 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:13:46,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 958 flow [2024-06-20 15:13:46,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 905 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:46,990 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 690 flow [2024-06-20 15:13:46,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=690, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-20 15:13:46,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-20 15:13:46,991 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 690 flow [2024-06-20 15:13:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:13:46,992 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)] === [2024-06-20 15:13:46,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1129457783, now seen corresponding path program 3 times [2024-06-20 15:13:46,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356484363] [2024-06-20 15:13:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356484363] [2024-06-20 15:13:47,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356484363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204376217] [2024-06-20 15:13:47,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:47,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:47,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 690 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:47,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:47,295 INFO L124 PetriNetUnfolderBase]: 969/1605 cut-off events. [2024-06-20 15:13:47,296 INFO L125 PetriNetUnfolderBase]: For 13320/13320 co-relation queries the response was YES. [2024-06-20 15:13:47,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7190 conditions, 1605 events. 969/1605 cut-off events. For 13320/13320 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8214 event pairs, 307 based on Foata normal form. 2/1599 useless extension candidates. Maximal degree in co-relation 7157. Up to 1310 conditions per place. [2024-06-20 15:13:47,307 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 38 changer transitions 0/103 dead transitions. [2024-06-20 15:13:47,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 928 flow [2024-06-20 15:13:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:13:47,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:13:47,308 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 690 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:13:47,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 928 flow [2024-06-20 15:13:47,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 836 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:47,321 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 682 flow [2024-06-20 15:13:47,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-20 15:13:47,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-20 15:13:47,322 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 682 flow [2024-06-20 15:13:47,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:47,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:47,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:13:47,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:47,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash 713496952, now seen corresponding path program 1 times [2024-06-20 15:13:47,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:47,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260495659] [2024-06-20 15:13:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:47,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260495659] [2024-06-20 15:13:47,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260495659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:47,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12162039] [2024-06-20 15:13:47,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:47,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:47,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:13:47,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 682 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:13:47,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:47,624 INFO L124 PetriNetUnfolderBase]: 911/1565 cut-off events. [2024-06-20 15:13:47,624 INFO L125 PetriNetUnfolderBase]: For 14592/14592 co-relation queries the response was YES. [2024-06-20 15:13:47,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7054 conditions, 1565 events. 911/1565 cut-off events. For 14592/14592 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8195 event pairs, 293 based on Foata normal form. 2/1565 useless extension candidates. Maximal degree in co-relation 7020. Up to 1310 conditions per place. [2024-06-20 15:13:47,635 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 78 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-06-20 15:13:47,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 109 transitions, 992 flow [2024-06-20 15:13:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:13:47,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:13:47,637 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 682 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:13:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 109 transitions, 992 flow [2024-06-20 15:13:47,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 861 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:47,649 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 660 flow [2024-06-20 15:13:47,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=660, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-06-20 15:13:47,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-20 15:13:47,650 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 660 flow [2024-06-20 15:13:47,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:47,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:47,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:13:47,651 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)] === [2024-06-20 15:13:47,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash 55122551, now seen corresponding path program 1 times [2024-06-20 15:13:47,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:47,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045136149] [2024-06-20 15:13:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:47,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045136149] [2024-06-20 15:13:47,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045136149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:47,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805624918] [2024-06-20 15:13:47,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:47,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:47,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:47,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:47,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:47,995 INFO L124 PetriNetUnfolderBase]: 996/1660 cut-off events. [2024-06-20 15:13:47,996 INFO L125 PetriNetUnfolderBase]: For 16311/16311 co-relation queries the response was YES. [2024-06-20 15:13:48,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7617 conditions, 1660 events. 996/1660 cut-off events. For 16311/16311 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8525 event pairs, 304 based on Foata normal form. 4/1659 useless extension candidates. Maximal degree in co-relation 7582. Up to 1416 conditions per place. [2024-06-20 15:13:48,006 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 87 selfloop transitions, 20 changer transitions 0/115 dead transitions. [2024-06-20 15:13:48,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 942 flow [2024-06-20 15:13:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:13:48,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:13:48,008 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 660 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:13:48,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 942 flow [2024-06-20 15:13:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 115 transitions, 926 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:48,020 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 713 flow [2024-06-20 15:13:48,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=713, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2024-06-20 15:13:48,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-20 15:13:48,021 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 713 flow [2024-06-20 15:13:48,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:48,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:48,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:13:48,021 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)] === [2024-06-20 15:13:48,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1226086619, now seen corresponding path program 2 times [2024-06-20 15:13:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:48,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978309816] [2024-06-20 15:13:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:48,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:48,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:48,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978309816] [2024-06-20 15:13:48,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978309816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:48,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105493421] [2024-06-20 15:13:48,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:48,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:48,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 713 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:48,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:48,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:48,335 INFO L124 PetriNetUnfolderBase]: 988/1653 cut-off events. [2024-06-20 15:13:48,335 INFO L125 PetriNetUnfolderBase]: For 18074/18074 co-relation queries the response was YES. [2024-06-20 15:13:48,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7837 conditions, 1653 events. 988/1653 cut-off events. For 18074/18074 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8521 event pairs, 273 based on Foata normal form. 4/1652 useless extension candidates. Maximal degree in co-relation 7799. Up to 1345 conditions per place. [2024-06-20 15:13:48,347 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-20 15:13:48,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 1007 flow [2024-06-20 15:13:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:13:48,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:13:48,349 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 713 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:13:48,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 1007 flow [2024-06-20 15:13:48,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 956 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:48,363 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 739 flow [2024-06-20 15:13:48,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=739, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-20 15:13:48,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 15:13:48,364 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 739 flow [2024-06-20 15:13:48,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:48,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:48,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:13:48,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:48,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:48,365 INFO L85 PathProgramCache]: Analyzing trace with hash -270590088, now seen corresponding path program 2 times [2024-06-20 15:13:48,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:48,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642312609] [2024-06-20 15:13:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:48,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642312609] [2024-06-20 15:13:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642312609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:48,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:48,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:48,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999518438] [2024-06-20 15:13:48,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:48,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:48,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:48,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:48,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:13:48,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 739 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:48,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:13:48,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:48,659 INFO L124 PetriNetUnfolderBase]: 914/1585 cut-off events. [2024-06-20 15:13:48,659 INFO L125 PetriNetUnfolderBase]: For 19238/19238 co-relation queries the response was YES. [2024-06-20 15:13:48,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7625 conditions, 1585 events. 914/1585 cut-off events. For 19238/19238 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8384 event pairs, 296 based on Foata normal form. 4/1587 useless extension candidates. Maximal degree in co-relation 7586. Up to 1321 conditions per place. [2024-06-20 15:13:48,669 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 79 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-06-20 15:13:48,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 114 transitions, 997 flow [2024-06-20 15:13:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-20 15:13:48,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-20 15:13:48,671 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 739 flow. Second operand 4 states and 111 transitions. [2024-06-20 15:13:48,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 114 transitions, 997 flow [2024-06-20 15:13:48,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 114 transitions, 932 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:48,690 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 760 flow [2024-06-20 15:13:48,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=760, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-20 15:13:48,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 15:13:48,690 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 760 flow [2024-06-20 15:13:48,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:48,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:48,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:13:48,691 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)] === [2024-06-20 15:13:48,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash 47155577, now seen corresponding path program 1 times [2024-06-20 15:13:48,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:48,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236249642] [2024-06-20 15:13:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:48,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:48,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:48,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236249642] [2024-06-20 15:13:48,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236249642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:48,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:48,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653981947] [2024-06-20 15:13:48,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:48,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:48,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:48,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 760 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:48,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:48,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,118 INFO L124 PetriNetUnfolderBase]: 1034/1727 cut-off events. [2024-06-20 15:13:49,119 INFO L125 PetriNetUnfolderBase]: For 22305/22305 co-relation queries the response was YES. [2024-06-20 15:13:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8649 conditions, 1727 events. 1034/1727 cut-off events. For 22305/22305 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8942 event pairs, 180 based on Foata normal form. 4/1729 useless extension candidates. Maximal degree in co-relation 8609. Up to 1452 conditions per place. [2024-06-20 15:13:49,129 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 19 changer transitions 0/141 dead transitions. [2024-06-20 15:13:49,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1238 flow [2024-06-20 15:13:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:13:49,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:13:49,132 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 760 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:13:49,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1238 flow [2024-06-20 15:13:49,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 141 transitions, 1204 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:49,151 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 827 flow [2024-06-20 15:13:49,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-20 15:13:49,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-20 15:13:49,152 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 827 flow [2024-06-20 15:13:49,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:49,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:49,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:13:49,152 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)] === [2024-06-20 15:13:49,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 160240411, now seen corresponding path program 2 times [2024-06-20 15:13:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:49,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986261708] [2024-06-20 15:13:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986261708] [2024-06-20 15:13:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986261708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:49,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:49,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561476454] [2024-06-20 15:13:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:49,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:49,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:49,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 827 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:49,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,596 INFO L124 PetriNetUnfolderBase]: 1026/1715 cut-off events. [2024-06-20 15:13:49,597 INFO L125 PetriNetUnfolderBase]: For 24167/24167 co-relation queries the response was YES. [2024-06-20 15:13:49,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8782 conditions, 1715 events. 1026/1715 cut-off events. For 24167/24167 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8864 event pairs, 264 based on Foata normal form. 4/1717 useless extension candidates. Maximal degree in co-relation 8741. Up to 1499 conditions per place. [2024-06-20 15:13:49,610 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2024-06-20 15:13:49,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1155 flow [2024-06-20 15:13:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:13:49,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:13:49,612 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 827 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:13:49,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1155 flow [2024-06-20 15:13:49,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 134 transitions, 1097 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:49,635 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 806 flow [2024-06-20 15:13:49,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=806, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-20 15:13:49,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-20 15:13:49,636 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 806 flow [2024-06-20 15:13:49,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:49,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:49,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:13:49,637 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)] === [2024-06-20 15:13:49,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 858263589, now seen corresponding path program 3 times [2024-06-20 15:13:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740141151] [2024-06-20 15:13:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:49,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740141151] [2024-06-20 15:13:49,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740141151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:49,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:49,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:49,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964513179] [2024-06-20 15:13:49,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:49,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:49,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:49,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:49,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 806 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:49,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:49,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,983 INFO L124 PetriNetUnfolderBase]: 1043/1733 cut-off events. [2024-06-20 15:13:49,984 INFO L125 PetriNetUnfolderBase]: For 26874/26877 co-relation queries the response was YES. [2024-06-20 15:13:49,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8961 conditions, 1733 events. 1043/1733 cut-off events. For 26874/26877 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8931 event pairs, 288 based on Foata normal form. 4/1727 useless extension candidates. Maximal degree in co-relation 8918. Up to 1408 conditions per place. [2024-06-20 15:13:49,997 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 40 changer transitions 0/133 dead transitions. [2024-06-20 15:13:49,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1154 flow [2024-06-20 15:13:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:13:49,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:13:49,998 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 806 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:13:49,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1154 flow [2024-06-20 15:13:50,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 133 transitions, 1119 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:50,022 INFO L231 Difference]: Finished difference. Result has 100 places, 106 transitions, 892 flow [2024-06-20 15:13:50,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2024-06-20 15:13:50,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 15:13:50,023 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 892 flow [2024-06-20 15:13:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:13:50,024 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:50,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 190543555, now seen corresponding path program 1 times [2024-06-20 15:13:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719086598] [2024-06-20 15:13:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:50,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719086598] [2024-06-20 15:13:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719086598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:50,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:50,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531825887] [2024-06-20 15:13:50,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:50,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:50,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:13:50,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 892 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:50,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:13:50,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:50,352 INFO L124 PetriNetUnfolderBase]: 970/1673 cut-off events. [2024-06-20 15:13:50,352 INFO L125 PetriNetUnfolderBase]: For 28891/28900 co-relation queries the response was YES. [2024-06-20 15:13:50,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8941 conditions, 1673 events. 970/1673 cut-off events. For 28891/28900 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8896 event pairs, 265 based on Foata normal form. 4/1675 useless extension candidates. Maximal degree in co-relation 8897. Up to 1392 conditions per place. [2024-06-20 15:13:50,365 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-20 15:13:50,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 129 transitions, 1266 flow [2024-06-20 15:13:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:13:50,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:13:50,368 INFO L175 Difference]: Start difference. First operand has 100 places, 106 transitions, 892 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:13:50,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 129 transitions, 1266 flow [2024-06-20 15:13:50,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 129 transitions, 1163 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:50,392 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 919 flow [2024-06-20 15:13:50,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=919, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-20 15:13:50,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-20 15:13:50,393 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 919 flow [2024-06-20 15:13:50,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:13:50,394 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)] === [2024-06-20 15:13:50,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2063316041, now seen corresponding path program 4 times [2024-06-20 15:13:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625222266] [2024-06-20 15:13:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:50,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:50,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625222266] [2024-06-20 15:13:50,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625222266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:50,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:50,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139380111] [2024-06-20 15:13:50,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:50,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:50,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:50,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:50,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:50,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:50,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:50,778 INFO L124 PetriNetUnfolderBase]: 1103/1836 cut-off events. [2024-06-20 15:13:50,782 INFO L125 PetriNetUnfolderBase]: For 35538/35538 co-relation queries the response was YES. [2024-06-20 15:13:50,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 1836 events. 1103/1836 cut-off events. For 35538/35538 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9668 event pairs, 287 based on Foata normal form. 20/1848 useless extension candidates. Maximal degree in co-relation 9736. Up to 1416 conditions per place. [2024-06-20 15:13:50,795 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-06-20 15:13:50,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 141 transitions, 1301 flow [2024-06-20 15:13:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:13:50,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:13:50,797 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 919 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:13:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 141 transitions, 1301 flow [2024-06-20 15:13:50,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1262 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:50,871 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 1000 flow [2024-06-20 15:13:50,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1000, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2024-06-20 15:13:50,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-20 15:13:50,872 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 1000 flow [2024-06-20 15:13:50,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:13:50,874 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)] === [2024-06-20 15:13:50,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash 574328515, now seen corresponding path program 2 times [2024-06-20 15:13:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924737065] [2024-06-20 15:13:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:51,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:51,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924737065] [2024-06-20 15:13:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924737065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:51,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:51,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103095317] [2024-06-20 15:13:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:51,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:51,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:51,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:13:51,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 1000 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:51,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:51,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:13:51,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,263 INFO L124 PetriNetUnfolderBase]: 1014/1751 cut-off events. [2024-06-20 15:13:51,264 INFO L125 PetriNetUnfolderBase]: For 33875/33884 co-relation queries the response was YES. [2024-06-20 15:13:51,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9612 conditions, 1751 events. 1014/1751 cut-off events. For 33875/33884 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9485 event pairs, 272 based on Foata normal form. 11/1760 useless extension candidates. Maximal degree in co-relation 9565. Up to 1485 conditions per place. [2024-06-20 15:13:51,280 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 91 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2024-06-20 15:13:51,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 1264 flow [2024-06-20 15:13:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 15:13:51,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-20 15:13:51,282 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 1000 flow. Second operand 5 states and 131 transitions. [2024-06-20 15:13:51,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 1264 flow [2024-06-20 15:13:51,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 129 transitions, 1164 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:51,320 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 950 flow [2024-06-20 15:13:51,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=950, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2024-06-20 15:13:51,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-20 15:13:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 950 flow [2024-06-20 15:13:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:51,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:51,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:51,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:13:51,321 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)] === [2024-06-20 15:13:51,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash 397292103, now seen corresponding path program 1 times [2024-06-20 15:13:51,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:51,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462691460] [2024-06-20 15:13:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:51,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:51,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:51,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462691460] [2024-06-20 15:13:51,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462691460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:51,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:51,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245187856] [2024-06-20 15:13:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:51,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:51,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:51,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 950 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) [2024-06-20 15:13:51,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:51,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:51,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,688 INFO L124 PetriNetUnfolderBase]: 1115/1872 cut-off events. [2024-06-20 15:13:51,688 INFO L125 PetriNetUnfolderBase]: For 36319/36319 co-relation queries the response was YES. [2024-06-20 15:13:51,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10028 conditions, 1872 events. 1115/1872 cut-off events. For 36319/36319 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9961 event pairs, 277 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 9980. Up to 1576 conditions per place. [2024-06-20 15:13:51,700 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 34 changer transitions 0/151 dead transitions. [2024-06-20 15:13:51,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 151 transitions, 1528 flow [2024-06-20 15:13:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:13:51,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:13:51,702 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 950 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:13:51,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 151 transitions, 1528 flow [2024-06-20 15:13:51,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 1452 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:51,723 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1145 flow [2024-06-20 15:13:51,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1145, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-20 15:13:51,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-20 15:13:51,724 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1145 flow [2024-06-20 15:13:51,724 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) [2024-06-20 15:13:51,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:51,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:51,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:13:51,725 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)] === [2024-06-20 15:13:51,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1251394355, now seen corresponding path program 2 times [2024-06-20 15:13:51,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86518386] [2024-06-20 15:13:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:51,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:51,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:51,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86518386] [2024-06-20 15:13:51,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86518386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:51,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:51,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:51,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244013242] [2024-06-20 15:13:51,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:51,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:51,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:51,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:51,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1145 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) [2024-06-20 15:13:51,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:51,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:51,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,103 INFO L124 PetriNetUnfolderBase]: 1181/1989 cut-off events. [2024-06-20 15:13:52,104 INFO L125 PetriNetUnfolderBase]: For 41492/41492 co-relation queries the response was YES. [2024-06-20 15:13:52,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11194 conditions, 1989 events. 1181/1989 cut-off events. For 41492/41492 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10739 event pairs, 271 based on Foata normal form. 4/1991 useless extension candidates. Maximal degree in co-relation 11143. Up to 1733 conditions per place. [2024-06-20 15:13:52,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 126 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-20 15:13:52,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 169 transitions, 1771 flow [2024-06-20 15:13:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:13:52,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:13:52,121 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1145 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:13:52,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 169 transitions, 1771 flow [2024-06-20 15:13:52,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1719 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:52,158 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1422 flow [2024-06-20 15:13:52,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1422, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-06-20 15:13:52,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-20 15:13:52,159 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1422 flow [2024-06-20 15:13:52,160 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) [2024-06-20 15:13:52,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:13:52,160 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)] === [2024-06-20 15:13:52,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash 208423943, now seen corresponding path program 3 times [2024-06-20 15:13:52,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208641405] [2024-06-20 15:13:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208641405] [2024-06-20 15:13:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208641405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188702477] [2024-06-20 15:13:52,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:52,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:52,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1422 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) [2024-06-20 15:13:52,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:52,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,582 INFO L124 PetriNetUnfolderBase]: 1229/2070 cut-off events. [2024-06-20 15:13:52,582 INFO L125 PetriNetUnfolderBase]: For 46719/46719 co-relation queries the response was YES. [2024-06-20 15:13:52,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12219 conditions, 2070 events. 1229/2070 cut-off events. For 46719/46719 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11265 event pairs, 271 based on Foata normal form. 4/2072 useless extension candidates. Maximal degree in co-relation 12164. Up to 1695 conditions per place. [2024-06-20 15:13:52,598 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-20 15:13:52,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 199 transitions, 2152 flow [2024-06-20 15:13:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:13:52,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 15:13:52,600 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1422 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:13:52,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 199 transitions, 2152 flow [2024-06-20 15:13:52,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 199 transitions, 2057 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:52,646 INFO L231 Difference]: Finished difference. Result has 125 places, 171 transitions, 1797 flow [2024-06-20 15:13:52,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1797, PETRI_PLACES=125, PETRI_TRANSITIONS=171} [2024-06-20 15:13:52,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 15:13:52,647 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 171 transitions, 1797 flow [2024-06-20 15:13:52,648 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) [2024-06-20 15:13:52,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:13:52,648 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)] === [2024-06-20 15:13:52,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-20 15:13:52,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699651402] [2024-06-20 15:13:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699651402] [2024-06-20 15:13:52,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699651402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218232039] [2024-06-20 15:13:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:52,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:52,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:13:52,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 171 transitions, 1797 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:13:52,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:53,007 INFO L124 PetriNetUnfolderBase]: 1162/2003 cut-off events. [2024-06-20 15:13:53,008 INFO L125 PetriNetUnfolderBase]: For 50019/50019 co-relation queries the response was YES. [2024-06-20 15:13:53,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12510 conditions, 2003 events. 1162/2003 cut-off events. For 50019/50019 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11058 event pairs, 270 based on Foata normal form. 2/2003 useless extension candidates. Maximal degree in co-relation 12451. Up to 1647 conditions per place. [2024-06-20 15:13:53,025 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 142 selfloop transitions, 10 changer transitions 0/182 dead transitions. [2024-06-20 15:13:53,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 182 transitions, 2153 flow [2024-06-20 15:13:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 15:13:53,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 15:13:53,026 INFO L175 Difference]: Start difference. First operand has 125 places, 171 transitions, 1797 flow. Second operand 4 states and 103 transitions. [2024-06-20 15:13:53,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 182 transitions, 2153 flow [2024-06-20 15:13:53,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 182 transitions, 2060 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:53,080 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 1763 flow [2024-06-20 15:13:53,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1763, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2024-06-20 15:13:53,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-20 15:13:53,080 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 1763 flow [2024-06-20 15:13:53,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:13:53,081 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:53,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash 628897646, now seen corresponding path program 1 times [2024-06-20 15:13:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392296408] [2024-06-20 15:13:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392296408] [2024-06-20 15:13:53,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392296408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:53,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197140507] [2024-06-20 15:13:53,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:53,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:53,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:53,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 1763 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:53,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:53,527 INFO L124 PetriNetUnfolderBase]: 1351/2278 cut-off events. [2024-06-20 15:13:53,528 INFO L125 PetriNetUnfolderBase]: For 59170/59170 co-relation queries the response was YES. [2024-06-20 15:13:53,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14011 conditions, 2278 events. 1351/2278 cut-off events. For 59170/59170 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12783 event pairs, 191 based on Foata normal form. 12/2282 useless extension candidates. Maximal degree in co-relation 13950. Up to 1603 conditions per place. [2024-06-20 15:13:53,548 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 165 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-20 15:13:53,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 208 transitions, 2407 flow [2024-06-20 15:13:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:13:53,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:13:53,549 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 1763 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:13:53,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 208 transitions, 2407 flow [2024-06-20 15:13:53,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 208 transitions, 2366 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:53,602 INFO L231 Difference]: Finished difference. Result has 132 places, 175 transitions, 1844 flow [2024-06-20 15:13:53,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1844, PETRI_PLACES=132, PETRI_TRANSITIONS=175} [2024-06-20 15:13:53,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-20 15:13:53,603 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 175 transitions, 1844 flow [2024-06-20 15:13:53,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:13:53,604 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:53,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash 822938266, now seen corresponding path program 2 times [2024-06-20 15:13:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967279691] [2024-06-20 15:13:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967279691] [2024-06-20 15:13:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967279691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:53,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622908631] [2024-06-20 15:13:53,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:53,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:53,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:53,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:53,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 175 transitions, 1844 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:53,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,126 INFO L124 PetriNetUnfolderBase]: 1392/2359 cut-off events. [2024-06-20 15:13:54,126 INFO L125 PetriNetUnfolderBase]: For 63111/63111 co-relation queries the response was YES. [2024-06-20 15:13:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14646 conditions, 2359 events. 1392/2359 cut-off events. For 63111/63111 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13438 event pairs, 258 based on Foata normal form. 12/2363 useless extension candidates. Maximal degree in co-relation 14584. Up to 1737 conditions per place. [2024-06-20 15:13:54,143 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 32 changer transitions 0/204 dead transitions. [2024-06-20 15:13:54,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 204 transitions, 2452 flow [2024-06-20 15:13:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:13:54,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:13:54,145 INFO L175 Difference]: Start difference. First operand has 132 places, 175 transitions, 1844 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:13:54,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 204 transitions, 2452 flow [2024-06-20 15:13:54,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 204 transitions, 2408 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:54,200 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1894 flow [2024-06-20 15:13:54,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1894, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-20 15:13:54,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-20 15:13:54,200 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1894 flow [2024-06-20 15:13:54,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:13:54,201 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:54,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash 823086136, now seen corresponding path program 3 times [2024-06-20 15:13:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938839200] [2024-06-20 15:13:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938839200] [2024-06-20 15:13:54,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938839200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:54,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613756535] [2024-06-20 15:13:54,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:54,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:54,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1894 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:54,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,664 INFO L124 PetriNetUnfolderBase]: 1364/2320 cut-off events. [2024-06-20 15:13:54,664 INFO L125 PetriNetUnfolderBase]: For 63525/63525 co-relation queries the response was YES. [2024-06-20 15:13:54,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14233 conditions, 2320 events. 1364/2320 cut-off events. For 63525/63525 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13188 event pairs, 252 based on Foata normal form. 16/2328 useless extension candidates. Maximal degree in co-relation 14169. Up to 1857 conditions per place. [2024-06-20 15:13:54,683 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 160 selfloop transitions, 31 changer transitions 0/199 dead transitions. [2024-06-20 15:13:54,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 199 transitions, 2352 flow [2024-06-20 15:13:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:13:54,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-20 15:13:54,685 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1894 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:13:54,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 199 transitions, 2352 flow [2024-06-20 15:13:54,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 2265 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:54,746 INFO L231 Difference]: Finished difference. Result has 137 places, 176 transitions, 1880 flow [2024-06-20 15:13:54,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1880, PETRI_PLACES=137, PETRI_TRANSITIONS=176} [2024-06-20 15:13:54,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-20 15:13:54,747 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 176 transitions, 1880 flow [2024-06-20 15:13:54,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:13:54,748 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:54,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1217777194, now seen corresponding path program 4 times [2024-06-20 15:13:54,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263622275] [2024-06-20 15:13:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263622275] [2024-06-20 15:13:54,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263622275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258616733] [2024-06-20 15:13:54,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:54,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:54,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:54,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 176 transitions, 1880 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:54,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,288 INFO L124 PetriNetUnfolderBase]: 1422/2403 cut-off events. [2024-06-20 15:13:55,289 INFO L125 PetriNetUnfolderBase]: For 67464/67464 co-relation queries the response was YES. [2024-06-20 15:13:55,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14704 conditions, 2403 events. 1422/2403 cut-off events. For 67464/67464 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13700 event pairs, 319 based on Foata normal form. 16/2411 useless extension candidates. Maximal degree in co-relation 14639. Up to 1941 conditions per place. [2024-06-20 15:13:55,312 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 39 changer transitions 0/204 dead transitions. [2024-06-20 15:13:55,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 204 transitions, 2382 flow [2024-06-20 15:13:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:13:55,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:13:55,314 INFO L175 Difference]: Start difference. First operand has 137 places, 176 transitions, 1880 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:13:55,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 204 transitions, 2382 flow [2024-06-20 15:13:55,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 204 transitions, 2307 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:55,377 INFO L231 Difference]: Finished difference. Result has 139 places, 177 transitions, 1916 flow [2024-06-20 15:13:55,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1916, PETRI_PLACES=139, PETRI_TRANSITIONS=177} [2024-06-20 15:13:55,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-20 15:13:55,378 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 177 transitions, 1916 flow [2024-06-20 15:13:55,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:55,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:55,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:55,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:13:55,379 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:55,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:55,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1417078984, now seen corresponding path program 5 times [2024-06-20 15:13:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:55,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868454129] [2024-06-20 15:13:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:55,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868454129] [2024-06-20 15:13:55,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868454129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:55,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:55,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818862428] [2024-06-20 15:13:55,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:55,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:55,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:55,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 177 transitions, 1916 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:55,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:55,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:55,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,901 INFO L124 PetriNetUnfolderBase]: 1480/2521 cut-off events. [2024-06-20 15:13:55,903 INFO L125 PetriNetUnfolderBase]: For 72479/72479 co-relation queries the response was YES. [2024-06-20 15:13:55,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15342 conditions, 2521 events. 1480/2521 cut-off events. For 72479/72479 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14627 event pairs, 339 based on Foata normal form. 16/2529 useless extension candidates. Maximal degree in co-relation 15276. Up to 2039 conditions per place. [2024-06-20 15:13:55,930 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 161 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2024-06-20 15:13:55,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 205 transitions, 2422 flow [2024-06-20 15:13:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:13:55,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:13:55,932 INFO L175 Difference]: Start difference. First operand has 139 places, 177 transitions, 1916 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:13:55,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 205 transitions, 2422 flow [2024-06-20 15:13:56,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 205 transitions, 2331 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:56,014 INFO L231 Difference]: Finished difference. Result has 141 places, 178 transitions, 1932 flow [2024-06-20 15:13:56,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=141, PETRI_TRANSITIONS=178} [2024-06-20 15:13:56,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-20 15:13:56,015 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 178 transitions, 1932 flow [2024-06-20 15:13:56,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:56,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:56,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:56,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:13:56,016 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)] === [2024-06-20 15:13:56,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1417226854, now seen corresponding path program 6 times [2024-06-20 15:13:56,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:56,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257673961] [2024-06-20 15:13:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257673961] [2024-06-20 15:13:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257673961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727854397] [2024-06-20 15:13:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:56,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 178 transitions, 1932 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:56,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:56,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:56,640 INFO L124 PetriNetUnfolderBase]: 1496/2553 cut-off events. [2024-06-20 15:13:56,641 INFO L125 PetriNetUnfolderBase]: For 72846/72846 co-relation queries the response was YES. [2024-06-20 15:13:56,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15389 conditions, 2553 events. 1496/2553 cut-off events. For 72846/72846 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14909 event pairs, 332 based on Foata normal form. 12/2557 useless extension candidates. Maximal degree in co-relation 15322. Up to 1772 conditions per place. [2024-06-20 15:13:56,660 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 161 selfloop transitions, 40 changer transitions 0/209 dead transitions. [2024-06-20 15:13:56,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 209 transitions, 2462 flow [2024-06-20 15:13:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:13:56,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:13:56,661 INFO L175 Difference]: Start difference. First operand has 141 places, 178 transitions, 1932 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:13:56,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 209 transitions, 2462 flow [2024-06-20 15:13:56,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 209 transitions, 2375 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:56,726 INFO L231 Difference]: Finished difference. Result has 143 places, 179 transitions, 1962 flow [2024-06-20 15:13:56,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1962, PETRI_PLACES=143, PETRI_TRANSITIONS=179} [2024-06-20 15:13:56,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-20 15:13:56,727 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 179 transitions, 1962 flow [2024-06-20 15:13:56,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:56,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:56,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:56,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:13:56,728 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)] === [2024-06-20 15:13:56,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:56,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1210152682, now seen corresponding path program 1 times [2024-06-20 15:13:56,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:56,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706385319] [2024-06-20 15:13:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:56,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706385319] [2024-06-20 15:13:56,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706385319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080389706] [2024-06-20 15:13:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:56,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 179 transitions, 1962 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:56,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:56,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,190 INFO L124 PetriNetUnfolderBase]: 1537/2634 cut-off events. [2024-06-20 15:13:57,190 INFO L125 PetriNetUnfolderBase]: For 77285/77285 co-relation queries the response was YES. [2024-06-20 15:13:57,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15850 conditions, 2634 events. 1537/2634 cut-off events. For 77285/77285 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15603 event pairs, 306 based on Foata normal form. 12/2638 useless extension candidates. Maximal degree in co-relation 15782. Up to 1853 conditions per place. [2024-06-20 15:13:57,211 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 44 changer transitions 0/210 dead transitions. [2024-06-20 15:13:57,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 210 transitions, 2500 flow [2024-06-20 15:13:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:13:57,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:13:57,212 INFO L175 Difference]: Start difference. First operand has 143 places, 179 transitions, 1962 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:13:57,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 210 transitions, 2500 flow [2024-06-20 15:13:57,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 210 transitions, 2401 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:57,280 INFO L231 Difference]: Finished difference. Result has 145 places, 180 transitions, 1989 flow [2024-06-20 15:13:57,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1989, PETRI_PLACES=145, PETRI_TRANSITIONS=180} [2024-06-20 15:13:57,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-20 15:13:57,280 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 180 transitions, 1989 flow [2024-06-20 15:13:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:57,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:13:57,281 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:57,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1444518573, now seen corresponding path program 1 times [2024-06-20 15:13:57,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182089988] [2024-06-20 15:13:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:57,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:57,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182089988] [2024-06-20 15:13:57,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182089988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:57,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:57,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:57,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306515] [2024-06-20 15:13:57,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:57,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:57,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:57,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:57,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 180 transitions, 1989 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) [2024-06-20 15:13:57,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:57,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:57,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,706 INFO L124 PetriNetUnfolderBase]: 1558/2669 cut-off events. [2024-06-20 15:13:57,706 INFO L125 PetriNetUnfolderBase]: For 77103/77106 co-relation queries the response was YES. [2024-06-20 15:13:57,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16196 conditions, 2669 events. 1558/2669 cut-off events. For 77103/77106 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15794 event pairs, 368 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 16127. Up to 2261 conditions per place. [2024-06-20 15:13:57,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 61 changer transitions 0/214 dead transitions. [2024-06-20 15:13:57,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 214 transitions, 2816 flow [2024-06-20 15:13:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:13:57,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:13:57,728 INFO L175 Difference]: Start difference. First operand has 145 places, 180 transitions, 1989 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:13:57,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 214 transitions, 2816 flow [2024-06-20 15:13:57,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 214 transitions, 2706 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:57,798 INFO L231 Difference]: Finished difference. Result has 147 places, 192 transitions, 2202 flow [2024-06-20 15:13:57,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2202, PETRI_PLACES=147, PETRI_TRANSITIONS=192} [2024-06-20 15:13:57,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-20 15:13:57,799 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 192 transitions, 2202 flow [2024-06-20 15:13:57,799 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) [2024-06-20 15:13:57,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:13:57,800 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:57,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash -40452925, now seen corresponding path program 2 times [2024-06-20 15:13:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980902159] [2024-06-20 15:13:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:57,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980902159] [2024-06-20 15:13:57,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980902159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:57,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:57,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421515991] [2024-06-20 15:13:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:57,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:57,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:57,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:57,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 192 transitions, 2202 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) [2024-06-20 15:13:57,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:57,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:57,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:58,232 INFO L124 PetriNetUnfolderBase]: 1563/2674 cut-off events. [2024-06-20 15:13:58,233 INFO L125 PetriNetUnfolderBase]: For 79710/79713 co-relation queries the response was YES. [2024-06-20 15:13:58,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16303 conditions, 2674 events. 1563/2674 cut-off events. For 79710/79713 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15756 event pairs, 368 based on Foata normal form. 1/2668 useless extension candidates. Maximal degree in co-relation 16232. Up to 2268 conditions per place. [2024-06-20 15:13:58,254 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 142 selfloop transitions, 64 changer transitions 0/214 dead transitions. [2024-06-20 15:13:58,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 214 transitions, 2909 flow [2024-06-20 15:13:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:13:58,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:13:58,256 INFO L175 Difference]: Start difference. First operand has 147 places, 192 transitions, 2202 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:13:58,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 214 transitions, 2909 flow [2024-06-20 15:13:58,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 214 transitions, 2830 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:58,350 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2296 flow [2024-06-20 15:13:58,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2296, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-20 15:13:58,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-20 15:13:58,351 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2296 flow [2024-06-20 15:13:58,351 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) [2024-06-20 15:13:58,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:13:58,351 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)] === [2024-06-20 15:13:58,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1246932014, now seen corresponding path program 2 times [2024-06-20 15:13:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822798941] [2024-06-20 15:13:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:58,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:58,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822798941] [2024-06-20 15:13:58,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822798941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:58,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:58,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960342753] [2024-06-20 15:13:58,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:58,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:58,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:58,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 2296 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:58,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:58,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:58,847 INFO L124 PetriNetUnfolderBase]: 1604/2744 cut-off events. [2024-06-20 15:13:58,847 INFO L125 PetriNetUnfolderBase]: For 90912/90912 co-relation queries the response was YES. [2024-06-20 15:13:58,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16835 conditions, 2744 events. 1604/2744 cut-off events. For 90912/90912 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16374 event pairs, 360 based on Foata normal form. 12/2748 useless extension candidates. Maximal degree in co-relation 16762. Up to 2144 conditions per place. [2024-06-20 15:13:58,875 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-20 15:13:58,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 226 transitions, 2868 flow [2024-06-20 15:13:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:13:58,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:13:58,877 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2296 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:13:58,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 226 transitions, 2868 flow [2024-06-20 15:13:58,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 226 transitions, 2743 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:58,972 INFO L231 Difference]: Finished difference. Result has 157 places, 196 transitions, 2289 flow [2024-06-20 15:13:58,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2289, PETRI_PLACES=157, PETRI_TRANSITIONS=196} [2024-06-20 15:13:58,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-20 15:13:58,973 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 196 transitions, 2289 flow [2024-06-20 15:13:58,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:58,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:13:58,974 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)] === [2024-06-20 15:13:58,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1746880436, now seen corresponding path program 3 times [2024-06-20 15:13:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373334430] [2024-06-20 15:13:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:59,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:59,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373334430] [2024-06-20 15:13:59,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373334430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:59,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:59,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:59,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947651507] [2024-06-20 15:13:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:59,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:59,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:59,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:59,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 196 transitions, 2289 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:59,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:59,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:59,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:59,462 INFO L124 PetriNetUnfolderBase]: 1584/2726 cut-off events. [2024-06-20 15:13:59,462 INFO L125 PetriNetUnfolderBase]: For 89033/89033 co-relation queries the response was YES. [2024-06-20 15:13:59,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16357 conditions, 2726 events. 1584/2726 cut-off events. For 89033/89033 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16364 event pairs, 305 based on Foata normal form. 12/2730 useless extension candidates. Maximal degree in co-relation 16283. Up to 1455 conditions per place. [2024-06-20 15:13:59,486 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 46 changer transitions 0/226 dead transitions. [2024-06-20 15:13:59,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 226 transitions, 2773 flow [2024-06-20 15:13:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:13:59,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:13:59,487 INFO L175 Difference]: Start difference. First operand has 157 places, 196 transitions, 2289 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:13:59,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 226 transitions, 2773 flow [2024-06-20 15:13:59,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 2657 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:59,570 INFO L231 Difference]: Finished difference. Result has 158 places, 195 transitions, 2215 flow [2024-06-20 15:13:59,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2215, PETRI_PLACES=158, PETRI_TRANSITIONS=195} [2024-06-20 15:13:59,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 15:13:59,571 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 195 transitions, 2215 flow [2024-06-20 15:13:59,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:59,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:59,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:13:59,571 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:59,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash -150907343, now seen corresponding path program 3 times [2024-06-20 15:13:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:59,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256749052] [2024-06-20 15:13:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:59,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256749052] [2024-06-20 15:13:59,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256749052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:59,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:59,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:59,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852894145] [2024-06-20 15:13:59,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:59,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:59,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:59,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:59,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:13:59,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 195 transitions, 2215 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) [2024-06-20 15:13:59,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:59,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:13:59,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:00,005 INFO L124 PetriNetUnfolderBase]: 1578/2713 cut-off events. [2024-06-20 15:14:00,005 INFO L125 PetriNetUnfolderBase]: For 77655/77655 co-relation queries the response was YES. [2024-06-20 15:14:00,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15905 conditions, 2713 events. 1578/2713 cut-off events. For 77655/77655 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16230 event pairs, 357 based on Foata normal form. 2/2710 useless extension candidates. Maximal degree in co-relation 15830. Up to 2302 conditions per place. [2024-06-20 15:14:00,031 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 60 changer transitions 0/213 dead transitions. [2024-06-20 15:14:00,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 213 transitions, 2813 flow [2024-06-20 15:14:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:14:00,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 15:14:00,032 INFO L175 Difference]: Start difference. First operand has 158 places, 195 transitions, 2215 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:14:00,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 213 transitions, 2813 flow [2024-06-20 15:14:00,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 213 transitions, 2648 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:00,118 INFO L231 Difference]: Finished difference. Result has 158 places, 195 transitions, 2177 flow [2024-06-20 15:14:00,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2177, PETRI_PLACES=158, PETRI_TRANSITIONS=195} [2024-06-20 15:14:00,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 15:14:00,119 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 195 transitions, 2177 flow [2024-06-20 15:14:00,119 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) [2024-06-20 15:14:00,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:00,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:00,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:14:00,120 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:00,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash -565135467, now seen corresponding path program 4 times [2024-06-20 15:14:00,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:00,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193072792] [2024-06-20 15:14:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:00,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193072792] [2024-06-20 15:14:00,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193072792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:00,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354141491] [2024-06-20 15:14:00,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:00,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:00,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:00,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:00,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 195 transitions, 2177 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) [2024-06-20 15:14:00,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:00,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:00,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:00,646 INFO L124 PetriNetUnfolderBase]: 1562/2694 cut-off events. [2024-06-20 15:14:00,646 INFO L125 PetriNetUnfolderBase]: For 77591/77591 co-relation queries the response was YES. [2024-06-20 15:14:00,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15289 conditions, 2694 events. 1562/2694 cut-off events. For 77591/77591 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16077 event pairs, 349 based on Foata normal form. 4/2696 useless extension candidates. Maximal degree in co-relation 15214. Up to 2383 conditions per place. [2024-06-20 15:14:00,668 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 37 changer transitions 0/210 dead transitions. [2024-06-20 15:14:00,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 210 transitions, 2624 flow [2024-06-20 15:14:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:14:00,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 15:14:00,669 INFO L175 Difference]: Start difference. First operand has 158 places, 195 transitions, 2177 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:14:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 210 transitions, 2624 flow [2024-06-20 15:14:00,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 210 transitions, 2534 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:00,743 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 2176 flow [2024-06-20 15:14:00,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2176, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-20 15:14:00,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-20 15:14:00,744 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 2176 flow [2024-06-20 15:14:00,744 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) [2024-06-20 15:14:00,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:00,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:00,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:14:00,744 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:00,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2128800201, now seen corresponding path program 5 times [2024-06-20 15:14:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:00,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068607545] [2024-06-20 15:14:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068607545] [2024-06-20 15:14:00,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068607545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:00,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237202626] [2024-06-20 15:14:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:00,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:00,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:00,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 2176 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) [2024-06-20 15:14:00,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:00,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:00,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,228 INFO L124 PetriNetUnfolderBase]: 1558/2689 cut-off events. [2024-06-20 15:14:01,228 INFO L125 PetriNetUnfolderBase]: For 78912/78912 co-relation queries the response was YES. [2024-06-20 15:14:01,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15156 conditions, 2689 events. 1558/2689 cut-off events. For 78912/78912 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16049 event pairs, 349 based on Foata normal form. 4/2691 useless extension candidates. Maximal degree in co-relation 15080. Up to 2269 conditions per place. [2024-06-20 15:14:01,252 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 75 changer transitions 0/225 dead transitions. [2024-06-20 15:14:01,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 225 transitions, 2804 flow [2024-06-20 15:14:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:14:01,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 15:14:01,253 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 2176 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:14:01,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 225 transitions, 2804 flow [2024-06-20 15:14:01,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 225 transitions, 2730 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:01,347 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2336 flow [2024-06-20 15:14:01,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2336, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-20 15:14:01,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 15:14:01,348 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2336 flow [2024-06-20 15:14:01,348 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) [2024-06-20 15:14:01,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:01,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:01,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:14:01,349 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:01,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash 933295961, now seen corresponding path program 6 times [2024-06-20 15:14:01,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:01,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386080808] [2024-06-20 15:14:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:01,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:01,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:01,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386080808] [2024-06-20 15:14:01,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386080808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:01,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:01,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:01,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835072969] [2024-06-20 15:14:01,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:01,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:01,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:01,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:01,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2336 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) [2024-06-20 15:14:01,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:01,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:01,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,817 INFO L124 PetriNetUnfolderBase]: 1548/2674 cut-off events. [2024-06-20 15:14:01,818 INFO L125 PetriNetUnfolderBase]: For 80287/80290 co-relation queries the response was YES. [2024-06-20 15:14:01,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15273 conditions, 2674 events. 1548/2674 cut-off events. For 80287/80290 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15978 event pairs, 357 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 15196. Up to 2259 conditions per place. [2024-06-20 15:14:01,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-20 15:14:01,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 220 transitions, 2816 flow [2024-06-20 15:14:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:14:01,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:14:01,843 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2336 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:14:01,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 220 transitions, 2816 flow [2024-06-20 15:14:02,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 220 transitions, 2643 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:02,011 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2327 flow [2024-06-20 15:14:02,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2327, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-20 15:14:02,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 15:14:02,012 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2327 flow [2024-06-20 15:14:02,012 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) [2024-06-20 15:14:02,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:14:02,013 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:02,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2016186254, now seen corresponding path program 1 times [2024-06-20 15:14:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393948093] [2024-06-20 15:14:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393948093] [2024-06-20 15:14:02,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393948093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728447797] [2024-06-20 15:14:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:02,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:02,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2327 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:02,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,481 INFO L124 PetriNetUnfolderBase]: 1566/2681 cut-off events. [2024-06-20 15:14:02,481 INFO L125 PetriNetUnfolderBase]: For 77128/77128 co-relation queries the response was YES. [2024-06-20 15:14:02,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15307 conditions, 2681 events. 1566/2681 cut-off events. For 77128/77128 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15946 event pairs, 358 based on Foata normal form. 2/2678 useless extension candidates. Maximal degree in co-relation 15231. Up to 2187 conditions per place. [2024-06-20 15:14:02,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 95 changer transitions 0/234 dead transitions. [2024-06-20 15:14:02,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 234 transitions, 3165 flow [2024-06-20 15:14:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:02,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:14:02,504 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2327 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:02,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 234 transitions, 3165 flow [2024-06-20 15:14:02,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 234 transitions, 2930 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:02,583 INFO L231 Difference]: Finished difference. Result has 166 places, 215 transitions, 2579 flow [2024-06-20 15:14:02,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2579, PETRI_PLACES=166, PETRI_TRANSITIONS=215} [2024-06-20 15:14:02,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-20 15:14:02,584 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 215 transitions, 2579 flow [2024-06-20 15:14:02,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:14:02,585 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:02,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash -565126384, now seen corresponding path program 2 times [2024-06-20 15:14:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646466919] [2024-06-20 15:14:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646466919] [2024-06-20 15:14:02,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646466919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:02,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719785002] [2024-06-20 15:14:02,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:02,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:02,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:02,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 215 transitions, 2579 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:02,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:03,078 INFO L124 PetriNetUnfolderBase]: 1600/2744 cut-off events. [2024-06-20 15:14:03,079 INFO L125 PetriNetUnfolderBase]: For 80390/80390 co-relation queries the response was YES. [2024-06-20 15:14:03,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16283 conditions, 2744 events. 1600/2744 cut-off events. For 80390/80390 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16417 event pairs, 348 based on Foata normal form. 2/2744 useless extension candidates. Maximal degree in co-relation 16205. Up to 2415 conditions per place. [2024-06-20 15:14:03,104 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 47 changer transitions 0/244 dead transitions. [2024-06-20 15:14:03,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 244 transitions, 3418 flow [2024-06-20 15:14:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:14:03,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:14:03,106 INFO L175 Difference]: Start difference. First operand has 166 places, 215 transitions, 2579 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:14:03,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 244 transitions, 3418 flow [2024-06-20 15:14:03,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 244 transitions, 3341 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-20 15:14:03,198 INFO L231 Difference]: Finished difference. Result has 174 places, 226 transitions, 2802 flow [2024-06-20 15:14:03,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2802, PETRI_PLACES=174, PETRI_TRANSITIONS=226} [2024-06-20 15:14:03,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-20 15:14:03,199 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 226 transitions, 2802 flow [2024-06-20 15:14:03,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:14:03,200 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:03,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -965154658, now seen corresponding path program 3 times [2024-06-20 15:14:03,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603675307] [2024-06-20 15:14:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:03,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:03,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603675307] [2024-06-20 15:14:03,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603675307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:03,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:03,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:03,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563498439] [2024-06-20 15:14:03,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:03,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:03,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:03,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:03,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:03,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 226 transitions, 2802 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:03,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:03,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:03,775 INFO L124 PetriNetUnfolderBase]: 1626/2789 cut-off events. [2024-06-20 15:14:03,776 INFO L125 PetriNetUnfolderBase]: For 85056/85056 co-relation queries the response was YES. [2024-06-20 15:14:03,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16573 conditions, 2789 events. 1626/2789 cut-off events. For 85056/85056 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16734 event pairs, 348 based on Foata normal form. 2/2789 useless extension candidates. Maximal degree in co-relation 16491. Up to 2318 conditions per place. [2024-06-20 15:14:03,804 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 99 changer transitions 0/266 dead transitions. [2024-06-20 15:14:03,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 266 transitions, 3719 flow [2024-06-20 15:14:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:14:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:14:03,806 INFO L175 Difference]: Start difference. First operand has 174 places, 226 transitions, 2802 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:14:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 266 transitions, 3719 flow [2024-06-20 15:14:03,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 266 transitions, 3640 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:03,914 INFO L231 Difference]: Finished difference. Result has 181 places, 237 transitions, 3186 flow [2024-06-20 15:14:03,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3186, PETRI_PLACES=181, PETRI_TRANSITIONS=237} [2024-06-20 15:14:03,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-20 15:14:03,915 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 237 transitions, 3186 flow [2024-06-20 15:14:03,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:14:03,916 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:03,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1431170954, now seen corresponding path program 1 times [2024-06-20 15:14:03,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894968785] [2024-06-20 15:14:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894968785] [2024-06-20 15:14:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894968785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455785099] [2024-06-20 15:14:04,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:04,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:04,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 237 transitions, 3186 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:04,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,470 INFO L124 PetriNetUnfolderBase]: 1647/2817 cut-off events. [2024-06-20 15:14:04,470 INFO L125 PetriNetUnfolderBase]: For 92467/92470 co-relation queries the response was YES. [2024-06-20 15:14:04,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17485 conditions, 2817 events. 1647/2817 cut-off events. For 92467/92470 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16929 event pairs, 382 based on Foata normal form. 1/2810 useless extension candidates. Maximal degree in co-relation 17399. Up to 2265 conditions per place. [2024-06-20 15:14:04,500 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 126 changer transitions 0/269 dead transitions. [2024-06-20 15:14:04,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 269 transitions, 4190 flow [2024-06-20 15:14:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:14:04,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:14:04,502 INFO L175 Difference]: Start difference. First operand has 181 places, 237 transitions, 3186 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:14:04,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 269 transitions, 4190 flow [2024-06-20 15:14:04,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 269 transitions, 4093 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:04,643 INFO L231 Difference]: Finished difference. Result has 186 places, 246 transitions, 3539 flow [2024-06-20 15:14:04,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3539, PETRI_PLACES=186, PETRI_TRANSITIONS=246} [2024-06-20 15:14:04,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-20 15:14:04,644 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 246 transitions, 3539 flow [2024-06-20 15:14:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:04,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:04,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:14:04,644 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)] === [2024-06-20 15:14:04,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2073802980, now seen corresponding path program 1 times [2024-06-20 15:14:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:04,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295992162] [2024-06-20 15:14:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:04,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295992162] [2024-06-20 15:14:04,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295992162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:04,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103172232] [2024-06-20 15:14:04,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:04,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:04,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:04,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 246 transitions, 3539 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:04,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,166 INFO L124 PetriNetUnfolderBase]: 1652/2827 cut-off events. [2024-06-20 15:14:05,166 INFO L125 PetriNetUnfolderBase]: For 93458/93461 co-relation queries the response was YES. [2024-06-20 15:14:05,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17832 conditions, 2827 events. 1652/2827 cut-off events. For 93458/93461 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17038 event pairs, 368 based on Foata normal form. 1/2821 useless extension candidates. Maximal degree in co-relation 17744. Up to 2412 conditions per place. [2024-06-20 15:14:05,193 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 67 changer transitions 0/271 dead transitions. [2024-06-20 15:14:05,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 271 transitions, 4326 flow [2024-06-20 15:14:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:14:05,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:14:05,195 INFO L175 Difference]: Start difference. First operand has 186 places, 246 transitions, 3539 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:14:05,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 271 transitions, 4326 flow [2024-06-20 15:14:05,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 271 transitions, 4116 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:05,339 INFO L231 Difference]: Finished difference. Result has 190 places, 249 transitions, 3516 flow [2024-06-20 15:14:05,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3516, PETRI_PLACES=190, PETRI_TRANSITIONS=249} [2024-06-20 15:14:05,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-20 15:14:05,340 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 249 transitions, 3516 flow [2024-06-20 15:14:05,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:14:05,340 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)] === [2024-06-20 15:14:05,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1571442716, now seen corresponding path program 2 times [2024-06-20 15:14:05,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623212616] [2024-06-20 15:14:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623212616] [2024-06-20 15:14:05,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623212616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:05,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781523074] [2024-06-20 15:14:05,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:05,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:05,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 249 transitions, 3516 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:05,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,918 INFO L124 PetriNetUnfolderBase]: 1665/2842 cut-off events. [2024-06-20 15:14:05,918 INFO L125 PetriNetUnfolderBase]: For 98636/98639 co-relation queries the response was YES. [2024-06-20 15:14:05,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17966 conditions, 2842 events. 1665/2842 cut-off events. For 98636/98639 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17023 event pairs, 383 based on Foata normal form. 1/2835 useless extension candidates. Maximal degree in co-relation 17877. Up to 2282 conditions per place. [2024-06-20 15:14:05,946 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 136 selfloop transitions, 132 changer transitions 0/276 dead transitions. [2024-06-20 15:14:05,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 276 transitions, 4540 flow [2024-06-20 15:14:05,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:14:05,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:14:05,947 INFO L175 Difference]: Start difference. First operand has 190 places, 249 transitions, 3516 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:14:05,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 276 transitions, 4540 flow [2024-06-20 15:14:06,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 276 transitions, 4388 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:06,097 INFO L231 Difference]: Finished difference. Result has 192 places, 255 transitions, 3744 flow [2024-06-20 15:14:06,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3744, PETRI_PLACES=192, PETRI_TRANSITIONS=255} [2024-06-20 15:14:06,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-20 15:14:06,098 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 255 transitions, 3744 flow [2024-06-20 15:14:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:14:06,099 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)] === [2024-06-20 15:14:06,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash -877693156, now seen corresponding path program 2 times [2024-06-20 15:14:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436891867] [2024-06-20 15:14:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436891867] [2024-06-20 15:14:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436891867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361788943] [2024-06-20 15:14:06,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:06,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:06,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:06,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 255 transitions, 3744 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:06,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,663 INFO L124 PetriNetUnfolderBase]: 1670/2855 cut-off events. [2024-06-20 15:14:06,663 INFO L125 PetriNetUnfolderBase]: For 103636/103639 co-relation queries the response was YES. [2024-06-20 15:14:06,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18300 conditions, 2855 events. 1670/2855 cut-off events. For 103636/103639 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17165 event pairs, 367 based on Foata normal form. 1/2850 useless extension candidates. Maximal degree in co-relation 18210. Up to 2436 conditions per place. [2024-06-20 15:14:06,690 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 200 selfloop transitions, 70 changer transitions 0/278 dead transitions. [2024-06-20 15:14:06,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 278 transitions, 4547 flow [2024-06-20 15:14:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:14:06,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 15:14:06,692 INFO L175 Difference]: Start difference. First operand has 192 places, 255 transitions, 3744 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:14:06,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 278 transitions, 4547 flow [2024-06-20 15:14:06,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 4277 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:06,857 INFO L231 Difference]: Finished difference. Result has 197 places, 258 transitions, 3667 flow [2024-06-20 15:14:06,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3667, PETRI_PLACES=197, PETRI_TRANSITIONS=258} [2024-06-20 15:14:06,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-20 15:14:06,858 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 258 transitions, 3667 flow [2024-06-20 15:14:06,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:14:06,858 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)] === [2024-06-20 15:14:06,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1571205566, now seen corresponding path program 3 times [2024-06-20 15:14:06,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983553123] [2024-06-20 15:14:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983553123] [2024-06-20 15:14:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983553123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:06,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558039033] [2024-06-20 15:14:06,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:06,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:06,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 258 transitions, 3667 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:06,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,423 INFO L124 PetriNetUnfolderBase]: 1667/2850 cut-off events. [2024-06-20 15:14:07,424 INFO L125 PetriNetUnfolderBase]: For 106488/106491 co-relation queries the response was YES. [2024-06-20 15:14:07,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18054 conditions, 2850 events. 1667/2850 cut-off events. For 106488/106491 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17152 event pairs, 385 based on Foata normal form. 1/2842 useless extension candidates. Maximal degree in co-relation 17964. Up to 2284 conditions per place. [2024-06-20 15:14:07,452 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 136 changer transitions 0/278 dead transitions. [2024-06-20 15:14:07,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 278 transitions, 4513 flow [2024-06-20 15:14:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:14:07,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:14:07,454 INFO L175 Difference]: Start difference. First operand has 197 places, 258 transitions, 3667 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:14:07,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 278 transitions, 4513 flow [2024-06-20 15:14:07,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 278 transitions, 4369 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:07,616 INFO L231 Difference]: Finished difference. Result has 200 places, 258 transitions, 3801 flow [2024-06-20 15:14:07,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3801, PETRI_PLACES=200, PETRI_TRANSITIONS=258} [2024-06-20 15:14:07,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-20 15:14:07,616 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 258 transitions, 3801 flow [2024-06-20 15:14:07,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:14:07,617 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)] === [2024-06-20 15:14:07,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-20 15:14:07,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357992021] [2024-06-20 15:14:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357992021] [2024-06-20 15:14:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357992021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086579961] [2024-06-20 15:14:07,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:14:07,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 258 transitions, 3801 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:07,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:14:07,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,175 INFO L124 PetriNetUnfolderBase]: 1619/2802 cut-off events. [2024-06-20 15:14:08,176 INFO L125 PetriNetUnfolderBase]: For 119204/119204 co-relation queries the response was YES. [2024-06-20 15:14:08,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18075 conditions, 2802 events. 1619/2802 cut-off events. For 119204/119204 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16979 event pairs, 339 based on Foata normal form. 10/2786 useless extension candidates. Maximal degree in co-relation 17983. Up to 2275 conditions per place. [2024-06-20 15:14:08,205 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 190 selfloop transitions, 37 changer transitions 0/280 dead transitions. [2024-06-20 15:14:08,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 280 transitions, 4339 flow [2024-06-20 15:14:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:14:08,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:14:08,206 INFO L175 Difference]: Start difference. First operand has 200 places, 258 transitions, 3801 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:14:08,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 280 transitions, 4339 flow [2024-06-20 15:14:08,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 4068 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:08,379 INFO L231 Difference]: Finished difference. Result has 202 places, 259 transitions, 3626 flow [2024-06-20 15:14:08,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3626, PETRI_PLACES=202, PETRI_TRANSITIONS=259} [2024-06-20 15:14:08,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-20 15:14:08,380 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 259 transitions, 3626 flow [2024-06-20 15:14:08,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:08,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:14:08,380 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)] === [2024-06-20 15:14:08,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,381 INFO L85 PathProgramCache]: Analyzing trace with hash -343530978, now seen corresponding path program 3 times [2024-06-20 15:14:08,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332193218] [2024-06-20 15:14:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332193218] [2024-06-20 15:14:08,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332193218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086019530] [2024-06-20 15:14:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:08,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 259 transitions, 3626 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:08,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,916 INFO L124 PetriNetUnfolderBase]: 1700/2905 cut-off events. [2024-06-20 15:14:08,916 INFO L125 PetriNetUnfolderBase]: For 113903/113903 co-relation queries the response was YES. [2024-06-20 15:14:08,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18395 conditions, 2905 events. 1700/2905 cut-off events. For 113903/113903 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17518 event pairs, 364 based on Foata normal form. 1/2901 useless extension candidates. Maximal degree in co-relation 18302. Up to 2485 conditions per place. [2024-06-20 15:14:08,947 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 199 selfloop transitions, 70 changer transitions 0/277 dead transitions. [2024-06-20 15:14:08,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 277 transitions, 4298 flow [2024-06-20 15:14:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:14:08,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:14:08,948 INFO L175 Difference]: Start difference. First operand has 202 places, 259 transitions, 3626 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:14:08,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 277 transitions, 4298 flow [2024-06-20 15:14:09,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 277 transitions, 4218 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:09,118 INFO L231 Difference]: Finished difference. Result has 204 places, 259 transitions, 3692 flow [2024-06-20 15:14:09,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3546, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3692, PETRI_PLACES=204, PETRI_TRANSITIONS=259} [2024-06-20 15:14:09,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 15:14:09,119 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 259 transitions, 3692 flow [2024-06-20 15:14:09,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:14:09,120 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)] === [2024-06-20 15:14:09,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash -383159096, now seen corresponding path program 4 times [2024-06-20 15:14:09,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807471380] [2024-06-20 15:14:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807471380] [2024-06-20 15:14:09,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807471380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233427394] [2024-06-20 15:14:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:09,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:09,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 259 transitions, 3692 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:09,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,626 INFO L124 PetriNetUnfolderBase]: 1694/2895 cut-off events. [2024-06-20 15:14:09,626 INFO L125 PetriNetUnfolderBase]: For 117606/117606 co-relation queries the response was YES. [2024-06-20 15:14:09,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18427 conditions, 2895 events. 1694/2895 cut-off events. For 117606/117606 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17451 event pairs, 363 based on Foata normal form. 2/2892 useless extension candidates. Maximal degree in co-relation 18333. Up to 2333 conditions per place. [2024-06-20 15:14:09,654 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 127 changer transitions 0/278 dead transitions. [2024-06-20 15:14:09,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 278 transitions, 4462 flow [2024-06-20 15:14:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:09,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:14:09,655 INFO L175 Difference]: Start difference. First operand has 204 places, 259 transitions, 3692 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:09,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 278 transitions, 4462 flow [2024-06-20 15:14:09,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 278 transitions, 4290 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:09,836 INFO L231 Difference]: Finished difference. Result has 206 places, 259 transitions, 3781 flow [2024-06-20 15:14:09,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3781, PETRI_PLACES=206, PETRI_TRANSITIONS=259} [2024-06-20 15:14:09,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 15:14:09,837 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 259 transitions, 3781 flow [2024-06-20 15:14:09,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:14:09,838 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)] === [2024-06-20 15:14:09,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash -723114198, now seen corresponding path program 4 times [2024-06-20 15:14:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803320384] [2024-06-20 15:14:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803320384] [2024-06-20 15:14:09,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803320384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:09,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002591290] [2024-06-20 15:14:09,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:09,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:09,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:09,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:09,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 259 transitions, 3781 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:09,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,381 INFO L124 PetriNetUnfolderBase]: 1691/2893 cut-off events. [2024-06-20 15:14:10,382 INFO L125 PetriNetUnfolderBase]: For 120378/120378 co-relation queries the response was YES. [2024-06-20 15:14:10,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18585 conditions, 2893 events. 1691/2893 cut-off events. For 120378/120378 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17454 event pairs, 364 based on Foata normal form. 1/2889 useless extension candidates. Maximal degree in co-relation 18490. Up to 2474 conditions per place. [2024-06-20 15:14:10,412 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 202 selfloop transitions, 66 changer transitions 0/276 dead transitions. [2024-06-20 15:14:10,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 276 transitions, 4359 flow [2024-06-20 15:14:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:14:10,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:14:10,414 INFO L175 Difference]: Start difference. First operand has 206 places, 259 transitions, 3781 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:14:10,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 276 transitions, 4359 flow [2024-06-20 15:14:10,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 276 transitions, 3992 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:10,599 INFO L231 Difference]: Finished difference. Result has 207 places, 259 transitions, 3552 flow [2024-06-20 15:14:10,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3552, PETRI_PLACES=207, PETRI_TRANSITIONS=259} [2024-06-20 15:14:10,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 15:14:10,600 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 259 transitions, 3552 flow [2024-06-20 15:14:10,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:10,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:14:10,600 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)] === [2024-06-20 15:14:10,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 625864, now seen corresponding path program 5 times [2024-06-20 15:14:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210431846] [2024-06-20 15:14:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:10,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210431846] [2024-06-20 15:14:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210431846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098588765] [2024-06-20 15:14:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:10,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:10,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:10,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:10,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 259 transitions, 3552 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:10,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,161 INFO L124 PetriNetUnfolderBase]: 1693/2903 cut-off events. [2024-06-20 15:14:11,162 INFO L125 PetriNetUnfolderBase]: For 122096/122096 co-relation queries the response was YES. [2024-06-20 15:14:11,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18434 conditions, 2903 events. 1693/2903 cut-off events. For 122096/122096 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17531 event pairs, 355 based on Foata normal form. 2/2903 useless extension candidates. Maximal degree in co-relation 18338. Up to 2552 conditions per place. [2024-06-20 15:14:11,190 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 50 changer transitions 0/280 dead transitions. [2024-06-20 15:14:11,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 280 transitions, 4397 flow [2024-06-20 15:14:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:14:11,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:14:11,192 INFO L175 Difference]: Start difference. First operand has 207 places, 259 transitions, 3552 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:14:11,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 280 transitions, 4397 flow [2024-06-20 15:14:11,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 280 transitions, 4218 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:11,382 INFO L231 Difference]: Finished difference. Result has 208 places, 262 transitions, 3541 flow [2024-06-20 15:14:11,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=208, PETRI_TRANSITIONS=262} [2024-06-20 15:14:11,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-20 15:14:11,383 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 262 transitions, 3541 flow [2024-06-20 15:14:11,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:14:11,383 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)] === [2024-06-20 15:14:11,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1701457736, now seen corresponding path program 6 times [2024-06-20 15:14:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184133130] [2024-06-20 15:14:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184133130] [2024-06-20 15:14:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184133130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:11,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093170041] [2024-06-20 15:14:11,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:11,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:11,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 262 transitions, 3541 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:11,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,930 INFO L124 PetriNetUnfolderBase]: 1695/2902 cut-off events. [2024-06-20 15:14:11,931 INFO L125 PetriNetUnfolderBase]: For 124665/124665 co-relation queries the response was YES. [2024-06-20 15:14:11,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18430 conditions, 2902 events. 1695/2902 cut-off events. For 124665/124665 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17521 event pairs, 351 based on Foata normal form. 2/2902 useless extension candidates. Maximal degree in co-relation 18334. Up to 2418 conditions per place. [2024-06-20 15:14:11,960 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 182 selfloop transitions, 104 changer transitions 0/294 dead transitions. [2024-06-20 15:14:11,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 294 transitions, 4442 flow [2024-06-20 15:14:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:14:11,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:14:11,961 INFO L175 Difference]: Start difference. First operand has 208 places, 262 transitions, 3541 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:14:11,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 294 transitions, 4442 flow [2024-06-20 15:14:12,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 294 transitions, 4310 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:12,161 INFO L231 Difference]: Finished difference. Result has 210 places, 265 transitions, 3690 flow [2024-06-20 15:14:12,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3690, PETRI_PLACES=210, PETRI_TRANSITIONS=265} [2024-06-20 15:14:12,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 15:14:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 265 transitions, 3690 flow [2024-06-20 15:14:12,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:12,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:12,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:14:12,162 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)] === [2024-06-20 15:14:12,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:12,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1778874362, now seen corresponding path program 7 times [2024-06-20 15:14:12,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:12,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107427600] [2024-06-20 15:14:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:12,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107427600] [2024-06-20 15:14:12,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107427600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:12,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462534611] [2024-06-20 15:14:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:12,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:12,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:12,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 265 transitions, 3690 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:12,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:12,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:12,670 INFO L124 PetriNetUnfolderBase]: 1700/2918 cut-off events. [2024-06-20 15:14:12,670 INFO L125 PetriNetUnfolderBase]: For 128847/128850 co-relation queries the response was YES. [2024-06-20 15:14:12,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18765 conditions, 2918 events. 1700/2918 cut-off events. For 128847/128850 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17678 event pairs, 362 based on Foata normal form. 3/2918 useless extension candidates. Maximal degree in co-relation 18668. Up to 2422 conditions per place. [2024-06-20 15:14:12,698 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 107 changer transitions 0/291 dead transitions. [2024-06-20 15:14:12,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 291 transitions, 4674 flow [2024-06-20 15:14:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:14:12,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:14:12,699 INFO L175 Difference]: Start difference. First operand has 210 places, 265 transitions, 3690 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:14:12,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 291 transitions, 4674 flow [2024-06-20 15:14:12,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 291 transitions, 4512 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:12,891 INFO L231 Difference]: Finished difference. Result has 212 places, 268 transitions, 3816 flow [2024-06-20 15:14:12,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3816, PETRI_PLACES=212, PETRI_TRANSITIONS=268} [2024-06-20 15:14:12,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-20 15:14:12,892 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 268 transitions, 3816 flow [2024-06-20 15:14:12,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:12,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:14:12,892 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)] === [2024-06-20 15:14:12,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:12,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1774948990, now seen corresponding path program 8 times [2024-06-20 15:14:12,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:12,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219338386] [2024-06-20 15:14:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219338386] [2024-06-20 15:14:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219338386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563916594] [2024-06-20 15:14:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:13,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:13,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 268 transitions, 3816 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:13,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,404 INFO L124 PetriNetUnfolderBase]: 1697/2910 cut-off events. [2024-06-20 15:14:13,404 INFO L125 PetriNetUnfolderBase]: For 128541/128544 co-relation queries the response was YES. [2024-06-20 15:14:13,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18682 conditions, 2910 events. 1697/2910 cut-off events. For 128541/128544 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17626 event pairs, 358 based on Foata normal form. 3/2910 useless extension candidates. Maximal degree in co-relation 18585. Up to 2420 conditions per place. [2024-06-20 15:14:13,433 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 107 changer transitions 0/293 dead transitions. [2024-06-20 15:14:13,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 293 transitions, 4648 flow [2024-06-20 15:14:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:14:13,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:14:13,434 INFO L175 Difference]: Start difference. First operand has 212 places, 268 transitions, 3816 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:14:13,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 293 transitions, 4648 flow [2024-06-20 15:14:13,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 293 transitions, 4340 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:13,640 INFO L231 Difference]: Finished difference. Result has 214 places, 268 transitions, 3728 flow [2024-06-20 15:14:13,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3728, PETRI_PLACES=214, PETRI_TRANSITIONS=268} [2024-06-20 15:14:13,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 15:14:13,641 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 268 transitions, 3728 flow [2024-06-20 15:14:13,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:13,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:13,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:14:13,642 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)] === [2024-06-20 15:14:13,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1936834956, now seen corresponding path program 2 times [2024-06-20 15:14:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:13,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347192634] [2024-06-20 15:14:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:13,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:13,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347192634] [2024-06-20 15:14:13,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347192634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:13,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:13,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:13,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803352598] [2024-06-20 15:14:13,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:13,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:13,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:14:13,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 268 transitions, 3728 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:13,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:14:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:14,192 INFO L124 PetriNetUnfolderBase]: 1647/2855 cut-off events. [2024-06-20 15:14:14,192 INFO L125 PetriNetUnfolderBase]: For 143898/143898 co-relation queries the response was YES. [2024-06-20 15:14:14,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18364 conditions, 2855 events. 1647/2855 cut-off events. For 143898/143898 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17452 event pairs, 341 based on Foata normal form. 10/2839 useless extension candidates. Maximal degree in co-relation 18267. Up to 2333 conditions per place. [2024-06-20 15:14:14,220 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 204 selfloop transitions, 29 changer transitions 0/289 dead transitions. [2024-06-20 15:14:14,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 289 transitions, 4278 flow [2024-06-20 15:14:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:14:14,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:14:14,222 INFO L175 Difference]: Start difference. First operand has 214 places, 268 transitions, 3728 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:14:14,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 289 transitions, 4278 flow [2024-06-20 15:14:14,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 289 transitions, 3921 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:14,482 INFO L231 Difference]: Finished difference. Result has 212 places, 269 transitions, 3453 flow [2024-06-20 15:14:14,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3453, PETRI_PLACES=212, PETRI_TRANSITIONS=269} [2024-06-20 15:14:14,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-20 15:14:14,483 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 269 transitions, 3453 flow [2024-06-20 15:14:14,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:14,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:14,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:14,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:14:14,483 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)] === [2024-06-20 15:14:14,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1924322736, now seen corresponding path program 3 times [2024-06-20 15:14:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:14,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890194114] [2024-06-20 15:14:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:14,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:14,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:14,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890194114] [2024-06-20 15:14:14,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890194114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:14,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:14,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:14,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054227332] [2024-06-20 15:14:14,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:14,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:14,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:14,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:14,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:14:14,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 269 transitions, 3453 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:14,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:14,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:14:14,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,003 INFO L124 PetriNetUnfolderBase]: 1684/2921 cut-off events. [2024-06-20 15:14:15,003 INFO L125 PetriNetUnfolderBase]: For 150695/150695 co-relation queries the response was YES. [2024-06-20 15:14:15,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18546 conditions, 2921 events. 1684/2921 cut-off events. For 150695/150695 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 17988 event pairs, 267 based on Foata normal form. 11/2907 useless extension candidates. Maximal degree in co-relation 18448. Up to 2363 conditions per place. [2024-06-20 15:14:15,032 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 210 selfloop transitions, 27 changer transitions 0/293 dead transitions. [2024-06-20 15:14:15,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 293 transitions, 4025 flow [2024-06-20 15:14:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-20 15:14:15,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-20 15:14:15,033 INFO L175 Difference]: Start difference. First operand has 212 places, 269 transitions, 3453 flow. Second operand 5 states and 137 transitions. [2024-06-20 15:14:15,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 293 transitions, 4025 flow [2024-06-20 15:14:15,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 293 transitions, 3965 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:15,216 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 3486 flow [2024-06-20 15:14:15,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3486, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-20 15:14:15,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-20 15:14:15,217 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 3486 flow [2024-06-20 15:14:15,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:15,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:15,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:14:15,218 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)] === [2024-06-20 15:14:15,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1331369122, now seen corresponding path program 4 times [2024-06-20 15:14:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:15,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443643185] [2024-06-20 15:14:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:15,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:15,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443643185] [2024-06-20 15:14:15,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443643185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:15,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:15,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320640836] [2024-06-20 15:14:15,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:15,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:15,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:14:15,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 3486 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:15,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:15,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:14:15,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,772 INFO L124 PetriNetUnfolderBase]: 1686/2927 cut-off events. [2024-06-20 15:14:15,773 INFO L125 PetriNetUnfolderBase]: For 144031/144031 co-relation queries the response was YES. [2024-06-20 15:14:15,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18531 conditions, 2927 events. 1686/2927 cut-off events. For 144031/144031 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18030 event pairs, 261 based on Foata normal form. 8/2910 useless extension candidates. Maximal degree in co-relation 18432. Up to 2341 conditions per place. [2024-06-20 15:14:15,800 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 212 selfloop transitions, 30 changer transitions 0/298 dead transitions. [2024-06-20 15:14:15,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 298 transitions, 4082 flow [2024-06-20 15:14:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:14:15,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:14:15,802 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 3486 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:14:15,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 298 transitions, 4082 flow [2024-06-20 15:14:16,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 298 transitions, 4025 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:16,007 INFO L231 Difference]: Finished difference. Result has 216 places, 272 transitions, 3515 flow [2024-06-20 15:14:16,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3515, PETRI_PLACES=216, PETRI_TRANSITIONS=272} [2024-06-20 15:14:16,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 15:14:16,008 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 272 transitions, 3515 flow [2024-06-20 15:14:16,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-20 15:14:16,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:14:16,009 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)] === [2024-06-20 15:14:16,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash -117245622, now seen corresponding path program 1 times [2024-06-20 15:14:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988388470] [2024-06-20 15:14:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988388470] [2024-06-20 15:14:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988388470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:16,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481140871] [2024-06-20 15:14:16,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:16,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:16,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 272 transitions, 3515 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:16,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:16,610 INFO L124 PetriNetUnfolderBase]: 1808/3090 cut-off events. [2024-06-20 15:14:16,611 INFO L125 PetriNetUnfolderBase]: For 143066/143066 co-relation queries the response was YES. [2024-06-20 15:14:16,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19454 conditions, 3090 events. 1808/3090 cut-off events. For 143066/143066 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 18911 event pairs, 316 based on Foata normal form. 4/3089 useless extension candidates. Maximal degree in co-relation 19354. Up to 2572 conditions per place. [2024-06-20 15:14:16,636 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 78 changer transitions 0/301 dead transitions. [2024-06-20 15:14:16,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 301 transitions, 4339 flow [2024-06-20 15:14:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:14:16,637 INFO L175 Difference]: Start difference. First operand has 216 places, 272 transitions, 3515 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 301 transitions, 4339 flow [2024-06-20 15:14:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 301 transitions, 4271 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:16,833 INFO L231 Difference]: Finished difference. Result has 219 places, 278 transitions, 3691 flow [2024-06-20 15:14:16,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3691, PETRI_PLACES=219, PETRI_TRANSITIONS=278} [2024-06-20 15:14:16,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-20 15:14:16,834 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 278 transitions, 3691 flow [2024-06-20 15:14:16,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:14:16,834 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)] === [2024-06-20 15:14:16,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash -114388662, now seen corresponding path program 2 times [2024-06-20 15:14:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058857646] [2024-06-20 15:14:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058857646] [2024-06-20 15:14:16,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058857646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:16,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840682274] [2024-06-20 15:14:16,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:16,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:16,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:16,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 278 transitions, 3691 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:16,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:17,377 INFO L124 PetriNetUnfolderBase]: 1824/3107 cut-off events. [2024-06-20 15:14:17,377 INFO L125 PetriNetUnfolderBase]: For 148832/148832 co-relation queries the response was YES. [2024-06-20 15:14:17,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 3107 events. 1824/3107 cut-off events. For 148832/148832 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 18976 event pairs, 373 based on Foata normal form. 4/3106 useless extension candidates. Maximal degree in co-relation 19793. Up to 2668 conditions per place. [2024-06-20 15:14:17,410 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 73 changer transitions 0/299 dead transitions. [2024-06-20 15:14:17,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 299 transitions, 4361 flow [2024-06-20 15:14:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:14:17,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:14:17,411 INFO L175 Difference]: Start difference. First operand has 219 places, 278 transitions, 3691 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:14:17,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 299 transitions, 4361 flow [2024-06-20 15:14:17,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 299 transitions, 4224 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:17,644 INFO L231 Difference]: Finished difference. Result has 224 places, 281 transitions, 3756 flow [2024-06-20 15:14:17,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3756, PETRI_PLACES=224, PETRI_TRANSITIONS=281} [2024-06-20 15:14:17,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-20 15:14:17,645 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 281 transitions, 3756 flow [2024-06-20 15:14:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:17,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:17,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:17,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:14:17,646 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)] === [2024-06-20 15:14:17,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash 902508, now seen corresponding path program 3 times [2024-06-20 15:14:17,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:17,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422654627] [2024-06-20 15:14:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:17,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:17,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:17,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422654627] [2024-06-20 15:14:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422654627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:17,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:17,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949292964] [2024-06-20 15:14:17,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:17,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:17,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 281 transitions, 3756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:17,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:17,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:17,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:18,239 INFO L124 PetriNetUnfolderBase]: 1896/3226 cut-off events. [2024-06-20 15:14:18,239 INFO L125 PetriNetUnfolderBase]: For 179038/179038 co-relation queries the response was YES. [2024-06-20 15:14:18,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20647 conditions, 3226 events. 1896/3226 cut-off events. For 179038/179038 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19782 event pairs, 373 based on Foata normal form. 20/3244 useless extension candidates. Maximal degree in co-relation 20543. Up to 2811 conditions per place. [2024-06-20 15:14:18,275 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 42 changer transitions 0/306 dead transitions. [2024-06-20 15:14:18,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 306 transitions, 4495 flow [2024-06-20 15:14:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:14:18,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:14:18,276 INFO L175 Difference]: Start difference. First operand has 224 places, 281 transitions, 3756 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:14:18,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 306 transitions, 4495 flow [2024-06-20 15:14:18,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 306 transitions, 4333 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:18,519 INFO L231 Difference]: Finished difference. Result has 227 places, 286 transitions, 3770 flow [2024-06-20 15:14:18,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=227, PETRI_TRANSITIONS=286} [2024-06-20 15:14:18,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-20 15:14:18,520 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 286 transitions, 3770 flow [2024-06-20 15:14:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:14:18,521 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)] === [2024-06-20 15:14:18,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1087206, now seen corresponding path program 1 times [2024-06-20 15:14:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132608462] [2024-06-20 15:14:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:18,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:18,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132608462] [2024-06-20 15:14:18,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132608462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:18,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:18,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:18,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044874853] [2024-06-20 15:14:18,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:18,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:18,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 286 transitions, 3770 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:18,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:18,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:19,069 INFO L124 PetriNetUnfolderBase]: 1904/3236 cut-off events. [2024-06-20 15:14:19,070 INFO L125 PetriNetUnfolderBase]: For 156869/156869 co-relation queries the response was YES. [2024-06-20 15:14:19,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20860 conditions, 3236 events. 1904/3236 cut-off events. For 156869/156869 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19791 event pairs, 373 based on Foata normal form. 2/3236 useless extension candidates. Maximal degree in co-relation 20755. Up to 2917 conditions per place. [2024-06-20 15:14:19,103 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 272 selfloop transitions, 24 changer transitions 0/304 dead transitions. [2024-06-20 15:14:19,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 304 transitions, 4443 flow [2024-06-20 15:14:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:14:19,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:14:19,104 INFO L175 Difference]: Start difference. First operand has 227 places, 286 transitions, 3770 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:14:19,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 304 transitions, 4443 flow [2024-06-20 15:14:19,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 304 transitions, 4335 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:19,379 INFO L231 Difference]: Finished difference. Result has 229 places, 289 transitions, 3770 flow [2024-06-20 15:14:19,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3770, PETRI_PLACES=229, PETRI_TRANSITIONS=289} [2024-06-20 15:14:19,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-20 15:14:19,380 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 289 transitions, 3770 flow [2024-06-20 15:14:19,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:19,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:14:19,381 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)] === [2024-06-20 15:14:19,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash 144972986, now seen corresponding path program 4 times [2024-06-20 15:14:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:19,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120096772] [2024-06-20 15:14:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:19,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120096772] [2024-06-20 15:14:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120096772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063283852] [2024-06-20 15:14:19,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:19,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:19,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 289 transitions, 3770 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:19,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:20,038 INFO L124 PetriNetUnfolderBase]: 1963/3336 cut-off events. [2024-06-20 15:14:20,038 INFO L125 PetriNetUnfolderBase]: For 189232/189232 co-relation queries the response was YES. [2024-06-20 15:14:20,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21281 conditions, 3336 events. 1963/3336 cut-off events. For 189232/189232 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20524 event pairs, 323 based on Foata normal form. 20/3354 useless extension candidates. Maximal degree in co-relation 21174. Up to 2699 conditions per place. [2024-06-20 15:14:20,074 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 91 changer transitions 0/327 dead transitions. [2024-06-20 15:14:20,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 4574 flow [2024-06-20 15:14:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:14:20,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:14:20,075 INFO L175 Difference]: Start difference. First operand has 229 places, 289 transitions, 3770 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:14:20,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 4574 flow [2024-06-20 15:14:20,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 327 transitions, 4495 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:20,349 INFO L231 Difference]: Finished difference. Result has 233 places, 293 transitions, 3967 flow [2024-06-20 15:14:20,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3967, PETRI_PLACES=233, PETRI_TRANSITIONS=293} [2024-06-20 15:14:20,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-20 15:14:20,350 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 293 transitions, 3967 flow [2024-06-20 15:14:20,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:20,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:20,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:14:20,350 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)] === [2024-06-20 15:14:20,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash 145157684, now seen corresponding path program 2 times [2024-06-20 15:14:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:20,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455450958] [2024-06-20 15:14:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:20,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:20,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:20,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455450958] [2024-06-20 15:14:20,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455450958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:20,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:20,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:20,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861440981] [2024-06-20 15:14:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:20,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:20,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:20,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:20,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:20,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 293 transitions, 3967 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:20,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:20,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:21,000 INFO L124 PetriNetUnfolderBase]: 1976/3350 cut-off events. [2024-06-20 15:14:21,000 INFO L125 PetriNetUnfolderBase]: For 166795/166795 co-relation queries the response was YES. [2024-06-20 15:14:21,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21990 conditions, 3350 events. 1976/3350 cut-off events. For 166795/166795 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20574 event pairs, 380 based on Foata normal form. 2/3350 useless extension candidates. Maximal degree in co-relation 21882. Up to 3022 conditions per place. [2024-06-20 15:14:21,031 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 275 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-20 15:14:21,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 312 transitions, 4694 flow [2024-06-20 15:14:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 15:14:21,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 15:14:21,033 INFO L175 Difference]: Start difference. First operand has 233 places, 293 transitions, 3967 flow. Second operand 6 states and 142 transitions. [2024-06-20 15:14:21,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 312 transitions, 4694 flow [2024-06-20 15:14:21,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 312 transitions, 4500 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:21,308 INFO L231 Difference]: Finished difference. Result has 234 places, 298 transitions, 3928 flow [2024-06-20 15:14:21,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3928, PETRI_PLACES=234, PETRI_TRANSITIONS=298} [2024-06-20 15:14:21,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 15:14:21,314 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 298 transitions, 3928 flow [2024-06-20 15:14:21,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:21,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:21,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:21,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:14:21,314 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)] === [2024-06-20 15:14:21,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:21,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1561578098, now seen corresponding path program 3 times [2024-06-20 15:14:21,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:21,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694091380] [2024-06-20 15:14:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:21,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:21,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694091380] [2024-06-20 15:14:21,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694091380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:21,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:21,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:21,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302500170] [2024-06-20 15:14:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:21,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:21,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:21,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:21,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 298 transitions, 3928 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:21,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:21,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:21,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:21,908 INFO L124 PetriNetUnfolderBase]: 1984/3362 cut-off events. [2024-06-20 15:14:21,908 INFO L125 PetriNetUnfolderBase]: For 165621/165621 co-relation queries the response was YES. [2024-06-20 15:14:21,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21718 conditions, 3362 events. 1984/3362 cut-off events. For 165621/165621 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20663 event pairs, 382 based on Foata normal form. 2/3362 useless extension candidates. Maximal degree in co-relation 21609. Up to 3028 conditions per place. [2024-06-20 15:14:21,943 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 276 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2024-06-20 15:14:21,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 313 transitions, 4614 flow [2024-06-20 15:14:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:14:21,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:14:21,944 INFO L175 Difference]: Start difference. First operand has 234 places, 298 transitions, 3928 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:14:21,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 313 transitions, 4614 flow [2024-06-20 15:14:22,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 313 transitions, 4538 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:22,221 INFO L231 Difference]: Finished difference. Result has 237 places, 300 transitions, 3969 flow [2024-06-20 15:14:22,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3969, PETRI_PLACES=237, PETRI_TRANSITIONS=300} [2024-06-20 15:14:22,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 15:14:22,221 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 300 transitions, 3969 flow [2024-06-20 15:14:22,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:22,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:22,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:14:22,222 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)] === [2024-06-20 15:14:22,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 4 times [2024-06-20 15:14:22,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:22,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513389326] [2024-06-20 15:14:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513389326] [2024-06-20 15:14:22,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513389326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:22,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:22,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492437184] [2024-06-20 15:14:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:22,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:22,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:22,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:22,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 300 transitions, 3969 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:22,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:22,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:22,801 INFO L124 PetriNetUnfolderBase]: 1979/3360 cut-off events. [2024-06-20 15:14:22,801 INFO L125 PetriNetUnfolderBase]: For 162497/162500 co-relation queries the response was YES. [2024-06-20 15:14:22,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21523 conditions, 3360 events. 1979/3360 cut-off events. For 162497/162500 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20696 event pairs, 380 based on Foata normal form. 4/3361 useless extension candidates. Maximal degree in co-relation 21413. Up to 3007 conditions per place. [2024-06-20 15:14:22,837 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 275 selfloop transitions, 30 changer transitions 0/313 dead transitions. [2024-06-20 15:14:22,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 4649 flow [2024-06-20 15:14:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-20 15:14:22,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:14:22,839 INFO L175 Difference]: Start difference. First operand has 237 places, 300 transitions, 3969 flow. Second operand 5 states and 120 transitions. [2024-06-20 15:14:22,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 4649 flow [2024-06-20 15:14:23,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 4558 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:23,216 INFO L231 Difference]: Finished difference. Result has 239 places, 302 transitions, 3991 flow [2024-06-20 15:14:23,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3991, PETRI_PLACES=239, PETRI_TRANSITIONS=302} [2024-06-20 15:14:23,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-20 15:14:23,216 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 302 transitions, 3991 flow [2024-06-20 15:14:23,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:23,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:23,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:14:23,217 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)] === [2024-06-20 15:14:23,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1708044062, now seen corresponding path program 1 times [2024-06-20 15:14:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:23,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299118472] [2024-06-20 15:14:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:23,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:23,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299118472] [2024-06-20 15:14:23,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299118472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:23,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:23,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647655691] [2024-06-20 15:14:23,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:23,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:23,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:23,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 302 transitions, 3991 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:23,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:23,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:23,832 INFO L124 PetriNetUnfolderBase]: 1992/3377 cut-off events. [2024-06-20 15:14:23,832 INFO L125 PetriNetUnfolderBase]: For 161851/161851 co-relation queries the response was YES. [2024-06-20 15:14:23,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21656 conditions, 3377 events. 1992/3377 cut-off events. For 161851/161851 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20780 event pairs, 379 based on Foata normal form. 1/3376 useless extension candidates. Maximal degree in co-relation 21545. Up to 3022 conditions per place. [2024-06-20 15:14:23,868 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 296 selfloop transitions, 31 changer transitions 0/335 dead transitions. [2024-06-20 15:14:23,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 335 transitions, 4913 flow [2024-06-20 15:14:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:23,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:14:23,869 INFO L175 Difference]: Start difference. First operand has 239 places, 302 transitions, 3991 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:23,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 335 transitions, 4913 flow [2024-06-20 15:14:24,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 335 transitions, 4820 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:24,154 INFO L231 Difference]: Finished difference. Result has 243 places, 308 transitions, 4056 flow [2024-06-20 15:14:24,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4056, PETRI_PLACES=243, PETRI_TRANSITIONS=308} [2024-06-20 15:14:24,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-20 15:14:24,155 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 308 transitions, 4056 flow [2024-06-20 15:14:24,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:24,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:14:24,156 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)] === [2024-06-20 15:14:24,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1343070004, now seen corresponding path program 2 times [2024-06-20 15:14:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:24,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368336614] [2024-06-20 15:14:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368336614] [2024-06-20 15:14:24,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368336614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:24,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:24,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:24,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026585741] [2024-06-20 15:14:24,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:24,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:24,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:24,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:24,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 308 transitions, 4056 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:24,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:24,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:24,778 INFO L124 PetriNetUnfolderBase]: 2002/3393 cut-off events. [2024-06-20 15:14:24,779 INFO L125 PetriNetUnfolderBase]: For 167790/167790 co-relation queries the response was YES. [2024-06-20 15:14:24,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22010 conditions, 3393 events. 2002/3393 cut-off events. For 167790/167790 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20878 event pairs, 379 based on Foata normal form. 1/3392 useless extension candidates. Maximal degree in co-relation 21898. Up to 3032 conditions per place. [2024-06-20 15:14:24,816 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 297 selfloop transitions, 38 changer transitions 0/343 dead transitions. [2024-06-20 15:14:24,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 343 transitions, 4993 flow [2024-06-20 15:14:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-20 15:14:24,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-20 15:14:24,817 INFO L175 Difference]: Start difference. First operand has 243 places, 308 transitions, 4056 flow. Second operand 9 states and 212 transitions. [2024-06-20 15:14:24,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 343 transitions, 4993 flow [2024-06-20 15:14:25,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 343 transitions, 4844 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:25,104 INFO L231 Difference]: Finished difference. Result has 247 places, 314 transitions, 4066 flow [2024-06-20 15:14:25,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3923, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4066, PETRI_PLACES=247, PETRI_TRANSITIONS=314} [2024-06-20 15:14:25,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-20 15:14:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 314 transitions, 4066 flow [2024-06-20 15:14:25,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:25,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:14:25,106 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)] === [2024-06-20 15:14:25,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1710903998, now seen corresponding path program 1 times [2024-06-20 15:14:25,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:25,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835043913] [2024-06-20 15:14:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:25,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:25,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835043913] [2024-06-20 15:14:25,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835043913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:25,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:25,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:25,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887777878] [2024-06-20 15:14:25,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:25,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:25,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:25,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:25,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 314 transitions, 4066 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:25,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:25,849 INFO L124 PetriNetUnfolderBase]: 2010/3405 cut-off events. [2024-06-20 15:14:25,849 INFO L125 PetriNetUnfolderBase]: For 174097/174097 co-relation queries the response was YES. [2024-06-20 15:14:25,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22148 conditions, 3405 events. 2010/3405 cut-off events. For 174097/174097 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20934 event pairs, 298 based on Foata normal form. 2/3405 useless extension candidates. Maximal degree in co-relation 22037. Up to 3010 conditions per place. [2024-06-20 15:14:25,896 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 307 selfloop transitions, 33 changer transitions 0/348 dead transitions. [2024-06-20 15:14:25,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 5016 flow [2024-06-20 15:14:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:14:25,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:14:25,897 INFO L175 Difference]: Start difference. First operand has 247 places, 314 transitions, 4066 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:14:25,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 5016 flow [2024-06-20 15:14:26,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 348 transitions, 4918 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:26,259 INFO L231 Difference]: Finished difference. Result has 249 places, 319 transitions, 4133 flow [2024-06-20 15:14:26,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4133, PETRI_PLACES=249, PETRI_TRANSITIONS=319} [2024-06-20 15:14:26,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-20 15:14:26,260 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 319 transitions, 4133 flow [2024-06-20 15:14:26,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:26,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:14:26,261 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)] === [2024-06-20 15:14:26,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1343067028, now seen corresponding path program 2 times [2024-06-20 15:14:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027425717] [2024-06-20 15:14:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:26,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:26,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027425717] [2024-06-20 15:14:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027425717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:26,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:26,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343642515] [2024-06-20 15:14:26,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:26,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:26,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 319 transitions, 4133 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:26,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:26,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:26,913 INFO L124 PetriNetUnfolderBase]: 2018/3417 cut-off events. [2024-06-20 15:14:26,914 INFO L125 PetriNetUnfolderBase]: For 179990/179990 co-relation queries the response was YES. [2024-06-20 15:14:26,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22438 conditions, 3417 events. 2018/3417 cut-off events. For 179990/179990 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20994 event pairs, 377 based on Foata normal form. 2/3417 useless extension candidates. Maximal degree in co-relation 22325. Up to 3071 conditions per place. [2024-06-20 15:14:26,952 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 309 selfloop transitions, 28 changer transitions 0/345 dead transitions. [2024-06-20 15:14:26,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 345 transitions, 4905 flow [2024-06-20 15:14:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:14:26,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:14:26,953 INFO L175 Difference]: Start difference. First operand has 249 places, 319 transitions, 4133 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:14:26,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 345 transitions, 4905 flow [2024-06-20 15:14:27,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 345 transitions, 4813 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:27,297 INFO L231 Difference]: Finished difference. Result has 253 places, 321 transitions, 4144 flow [2024-06-20 15:14:27,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4144, PETRI_PLACES=253, PETRI_TRANSITIONS=321} [2024-06-20 15:14:27,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-20 15:14:27,298 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 321 transitions, 4144 flow [2024-06-20 15:14:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:27,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:14:27,299 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)] === [2024-06-20 15:14:27,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1618286388, now seen corresponding path program 3 times [2024-06-20 15:14:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030474458] [2024-06-20 15:14:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:27,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:27,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030474458] [2024-06-20 15:14:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030474458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:27,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:27,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884140764] [2024-06-20 15:14:27,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:27,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:27,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:27,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:27,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:27,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 321 transitions, 4144 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:27,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:27,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:27,903 INFO L124 PetriNetUnfolderBase]: 2039/3446 cut-off events. [2024-06-20 15:14:27,904 INFO L125 PetriNetUnfolderBase]: For 188464/188467 co-relation queries the response was YES. [2024-06-20 15:14:27,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22796 conditions, 3446 events. 2039/3446 cut-off events. For 188464/188467 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 21262 event pairs, 412 based on Foata normal form. 1/3434 useless extension candidates. Maximal degree in co-relation 22681. Up to 2834 conditions per place. [2024-06-20 15:14:27,943 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 102 changer transitions 0/361 dead transitions. [2024-06-20 15:14:27,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 361 transitions, 5610 flow [2024-06-20 15:14:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:14:27,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:14:27,945 INFO L175 Difference]: Start difference. First operand has 253 places, 321 transitions, 4144 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:14:27,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 361 transitions, 5610 flow [2024-06-20 15:14:28,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 361 transitions, 5541 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:28,254 INFO L231 Difference]: Finished difference. Result has 255 places, 334 transitions, 4491 flow [2024-06-20 15:14:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4491, PETRI_PLACES=255, PETRI_TRANSITIONS=334} [2024-06-20 15:14:28,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-20 15:14:28,254 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 334 transitions, 4491 flow [2024-06-20 15:14:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:28,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:28,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:14:28,255 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)] === [2024-06-20 15:14:28,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1452945784, now seen corresponding path program 4 times [2024-06-20 15:14:28,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:28,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521113341] [2024-06-20 15:14:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521113341] [2024-06-20 15:14:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521113341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:28,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:28,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979122511] [2024-06-20 15:14:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:28,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:28,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:28,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 334 transitions, 4491 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:28,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:28,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:28,857 INFO L124 PetriNetUnfolderBase]: 2044/3455 cut-off events. [2024-06-20 15:14:28,858 INFO L125 PetriNetUnfolderBase]: For 196321/196324 co-relation queries the response was YES. [2024-06-20 15:14:28,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3455 events. 2044/3455 cut-off events. For 196321/196324 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21312 event pairs, 412 based on Foata normal form. 1/3443 useless extension candidates. Maximal degree in co-relation 23386. Up to 2838 conditions per place. [2024-06-20 15:14:28,896 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 104 changer transitions 0/360 dead transitions. [2024-06-20 15:14:28,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 360 transitions, 5685 flow [2024-06-20 15:14:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:14:28,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:14:28,898 INFO L175 Difference]: Start difference. First operand has 255 places, 334 transitions, 4491 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:14:28,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 360 transitions, 5685 flow [2024-06-20 15:14:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 360 transitions, 5562 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-20 15:14:29,244 INFO L231 Difference]: Finished difference. Result has 261 places, 337 transitions, 4638 flow [2024-06-20 15:14:29,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4638, PETRI_PLACES=261, PETRI_TRANSITIONS=337} [2024-06-20 15:14:29,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-20 15:14:29,244 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 337 transitions, 4638 flow [2024-06-20 15:14:29,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:29,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:29,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:14:29,245 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)] === [2024-06-20 15:14:29,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1474857164, now seen corresponding path program 5 times [2024-06-20 15:14:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:29,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967719499] [2024-06-20 15:14:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:29,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967719499] [2024-06-20 15:14:29,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967719499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:29,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:29,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335865321] [2024-06-20 15:14:29,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:29,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:29,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:29,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 337 transitions, 4638 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:29,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:29,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:29,907 INFO L124 PetriNetUnfolderBase]: 2049/3474 cut-off events. [2024-06-20 15:14:29,907 INFO L125 PetriNetUnfolderBase]: For 200639/200639 co-relation queries the response was YES. [2024-06-20 15:14:29,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23672 conditions, 3474 events. 2049/3474 cut-off events. For 200639/200639 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21497 event pairs, 377 based on Foata normal form. 1/3473 useless extension candidates. Maximal degree in co-relation 23553. Up to 3117 conditions per place. [2024-06-20 15:14:29,948 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 321 selfloop transitions, 28 changer transitions 0/357 dead transitions. [2024-06-20 15:14:29,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 357 transitions, 5423 flow [2024-06-20 15:14:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:14:29,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:14:29,949 INFO L175 Difference]: Start difference. First operand has 261 places, 337 transitions, 4638 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:14:29,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 357 transitions, 5423 flow [2024-06-20 15:14:30,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 357 transitions, 5267 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:30,295 INFO L231 Difference]: Finished difference. Result has 265 places, 340 transitions, 4595 flow [2024-06-20 15:14:30,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4595, PETRI_PLACES=265, PETRI_TRANSITIONS=340} [2024-06-20 15:14:30,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-20 15:14:30,296 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 340 transitions, 4595 flow [2024-06-20 15:14:30,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:30,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:30,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:14:30,297 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)] === [2024-06-20 15:14:30,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1470095564, now seen corresponding path program 6 times [2024-06-20 15:14:30,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:30,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744229803] [2024-06-20 15:14:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:30,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744229803] [2024-06-20 15:14:30,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744229803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:30,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524465631] [2024-06-20 15:14:30,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:30,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:30,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:30,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:30,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 340 transitions, 4595 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:30,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:30,925 INFO L124 PetriNetUnfolderBase]: 2070/3497 cut-off events. [2024-06-20 15:14:30,925 INFO L125 PetriNetUnfolderBase]: For 211485/211488 co-relation queries the response was YES. [2024-06-20 15:14:30,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23888 conditions, 3497 events. 2070/3497 cut-off events. For 211485/211488 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21602 event pairs, 412 based on Foata normal form. 1/3485 useless extension candidates. Maximal degree in co-relation 23768. Up to 2861 conditions per place. [2024-06-20 15:14:30,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 114 changer transitions 0/367 dead transitions. [2024-06-20 15:14:30,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 367 transitions, 5860 flow [2024-06-20 15:14:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:14:30,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:14:30,967 INFO L175 Difference]: Start difference. First operand has 265 places, 340 transitions, 4595 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:14:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 367 transitions, 5860 flow [2024-06-20 15:14:31,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 367 transitions, 5786 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:31,336 INFO L231 Difference]: Finished difference. Result has 268 places, 347 transitions, 4864 flow [2024-06-20 15:14:31,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4864, PETRI_PLACES=268, PETRI_TRANSITIONS=347} [2024-06-20 15:14:31,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-20 15:14:31,336 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 347 transitions, 4864 flow [2024-06-20 15:14:31,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:31,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:31,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:14:31,337 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)] === [2024-06-20 15:14:31,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:31,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1474860140, now seen corresponding path program 3 times [2024-06-20 15:14:31,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:31,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777822542] [2024-06-20 15:14:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:31,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:31,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777822542] [2024-06-20 15:14:31,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777822542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:31,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:31,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401429914] [2024-06-20 15:14:31,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:31,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:31,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 347 transitions, 4864 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:31,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:31,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:31,977 INFO L124 PetriNetUnfolderBase]: 2065/3502 cut-off events. [2024-06-20 15:14:31,978 INFO L125 PetriNetUnfolderBase]: For 215232/215232 co-relation queries the response was YES. [2024-06-20 15:14:32,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24083 conditions, 3502 events. 2065/3502 cut-off events. For 215232/215232 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21682 event pairs, 376 based on Foata normal form. 2/3502 useless extension candidates. Maximal degree in co-relation 23962. Up to 3136 conditions per place. [2024-06-20 15:14:32,021 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 330 selfloop transitions, 27 changer transitions 0/365 dead transitions. [2024-06-20 15:14:32,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 365 transitions, 5622 flow [2024-06-20 15:14:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:14:32,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:14:32,023 INFO L175 Difference]: Start difference. First operand has 268 places, 347 transitions, 4864 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:14:32,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 365 transitions, 5622 flow [2024-06-20 15:14:32,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 365 transitions, 5433 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:32,374 INFO L231 Difference]: Finished difference. Result has 272 places, 347 transitions, 4734 flow [2024-06-20 15:14:32,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4734, PETRI_PLACES=272, PETRI_TRANSITIONS=347} [2024-06-20 15:14:32,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-20 15:14:32,375 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 347 transitions, 4734 flow [2024-06-20 15:14:32,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:32,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:32,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:14:32,376 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)] === [2024-06-20 15:14:32,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:32,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1628774587, now seen corresponding path program 1 times [2024-06-20 15:14:32,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:32,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176901611] [2024-06-20 15:14:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:32,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176901611] [2024-06-20 15:14:32,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176901611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612912508] [2024-06-20 15:14:32,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:32,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 347 transitions, 4734 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:32,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:33,051 INFO L124 PetriNetUnfolderBase]: 2070/3505 cut-off events. [2024-06-20 15:14:33,051 INFO L125 PetriNetUnfolderBase]: For 219087/219090 co-relation queries the response was YES. [2024-06-20 15:14:33,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23928 conditions, 3505 events. 2070/3505 cut-off events. For 219087/219090 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21678 event pairs, 416 based on Foata normal form. 1/3497 useless extension candidates. Maximal degree in co-relation 23806. Up to 2901 conditions per place. [2024-06-20 15:14:33,093 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 150 changer transitions 0/373 dead transitions. [2024-06-20 15:14:33,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 373 transitions, 5834 flow [2024-06-20 15:14:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:14:33,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 15:14:33,095 INFO L175 Difference]: Start difference. First operand has 272 places, 347 transitions, 4734 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:14:33,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 373 transitions, 5834 flow [2024-06-20 15:14:33,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 373 transitions, 5795 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:33,487 INFO L231 Difference]: Finished difference. Result has 277 places, 350 transitions, 5047 flow [2024-06-20 15:14:33,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4695, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5047, PETRI_PLACES=277, PETRI_TRANSITIONS=350} [2024-06-20 15:14:33,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 15:14:33,488 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 350 transitions, 5047 flow [2024-06-20 15:14:33,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:33,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:33,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:33,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:14:33,488 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)] === [2024-06-20 15:14:33,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1674104751, now seen corresponding path program 2 times [2024-06-20 15:14:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:33,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002550691] [2024-06-20 15:14:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:33,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:33,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002550691] [2024-06-20 15:14:33,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002550691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:33,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:33,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:33,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230219654] [2024-06-20 15:14:33,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:33,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:33,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:33,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:33,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:33,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:33,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 350 transitions, 5047 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:33,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:33,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:33,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:34,197 INFO L124 PetriNetUnfolderBase]: 2075/3514 cut-off events. [2024-06-20 15:14:34,197 INFO L125 PetriNetUnfolderBase]: For 226740/226743 co-relation queries the response was YES. [2024-06-20 15:14:34,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24427 conditions, 3514 events. 2075/3514 cut-off events. For 226740/226743 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21825 event pairs, 415 based on Foata normal form. 1/3506 useless extension candidates. Maximal degree in co-relation 24304. Up to 2907 conditions per place. [2024-06-20 15:14:34,244 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 153 changer transitions 0/376 dead transitions. [2024-06-20 15:14:34,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 376 transitions, 6163 flow [2024-06-20 15:14:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:14:34,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:14:34,246 INFO L175 Difference]: Start difference. First operand has 277 places, 350 transitions, 5047 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:14:34,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 376 transitions, 6163 flow [2024-06-20 15:14:34,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 376 transitions, 5909 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:34,838 INFO L231 Difference]: Finished difference. Result has 280 places, 353 transitions, 5157 flow [2024-06-20 15:14:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5157, PETRI_PLACES=280, PETRI_TRANSITIONS=353} [2024-06-20 15:14:34,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 15:14:34,839 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 353 transitions, 5157 flow [2024-06-20 15:14:34,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:34,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:14:34,839 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)] === [2024-06-20 15:14:34,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1210562189, now seen corresponding path program 3 times [2024-06-20 15:14:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:34,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262799739] [2024-06-20 15:14:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:34,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:34,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:34,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262799739] [2024-06-20 15:14:34,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262799739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:34,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:34,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:34,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886416016] [2024-06-20 15:14:34,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:34,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:35,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:35,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 353 transitions, 5157 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:35,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:35,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:35,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:35,562 INFO L124 PetriNetUnfolderBase]: 2088/3536 cut-off events. [2024-06-20 15:14:35,562 INFO L125 PetriNetUnfolderBase]: For 236564/236567 co-relation queries the response was YES. [2024-06-20 15:14:35,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24756 conditions, 3536 events. 2088/3536 cut-off events. For 236564/236567 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21950 event pairs, 417 based on Foata normal form. 1/3528 useless extension candidates. Maximal degree in co-relation 24631. Up to 2922 conditions per place. [2024-06-20 15:14:35,607 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 159 changer transitions 0/381 dead transitions. [2024-06-20 15:14:35,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 381 transitions, 6479 flow [2024-06-20 15:14:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:14:35,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-20 15:14:35,608 INFO L175 Difference]: Start difference. First operand has 280 places, 353 transitions, 5157 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:14:35,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 381 transitions, 6479 flow [2024-06-20 15:14:36,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 381 transitions, 6125 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:36,105 INFO L231 Difference]: Finished difference. Result has 283 places, 359 transitions, 5237 flow [2024-06-20 15:14:36,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5237, PETRI_PLACES=283, PETRI_TRANSITIONS=359} [2024-06-20 15:14:36,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-20 15:14:36,106 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 359 transitions, 5237 flow [2024-06-20 15:14:36,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:36,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:36,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:14:36,107 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)] === [2024-06-20 15:14:36,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1438682819, now seen corresponding path program 4 times [2024-06-20 15:14:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:36,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096685609] [2024-06-20 15:14:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:36,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:36,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096685609] [2024-06-20 15:14:36,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096685609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:36,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:36,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:36,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775383553] [2024-06-20 15:14:36,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:36,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:36,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:36,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:36,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:36,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 359 transitions, 5237 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:36,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:36,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:36,846 INFO L124 PetriNetUnfolderBase]: 2101/3561 cut-off events. [2024-06-20 15:14:36,846 INFO L125 PetriNetUnfolderBase]: For 245277/245280 co-relation queries the response was YES. [2024-06-20 15:14:36,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25046 conditions, 3561 events. 2101/3561 cut-off events. For 245277/245280 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 22156 event pairs, 412 based on Foata normal form. 1/3556 useless extension candidates. Maximal degree in co-relation 24920. Up to 2937 conditions per place. [2024-06-20 15:14:36,891 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 217 selfloop transitions, 163 changer transitions 0/388 dead transitions. [2024-06-20 15:14:36,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 388 transitions, 6721 flow [2024-06-20 15:14:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 15:14:36,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-20 15:14:36,893 INFO L175 Difference]: Start difference. First operand has 283 places, 359 transitions, 5237 flow. Second operand 9 states and 217 transitions. [2024-06-20 15:14:36,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 388 transitions, 6721 flow [2024-06-20 15:14:37,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 388 transitions, 6411 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:37,404 INFO L231 Difference]: Finished difference. Result has 287 places, 365 transitions, 5369 flow [2024-06-20 15:14:37,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5369, PETRI_PLACES=287, PETRI_TRANSITIONS=365} [2024-06-20 15:14:37,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-20 15:14:37,405 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 365 transitions, 5369 flow [2024-06-20 15:14:37,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:37,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:37,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:37,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:14:37,406 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)] === [2024-06-20 15:14:37,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1470082885, now seen corresponding path program 5 times [2024-06-20 15:14:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:37,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913587657] [2024-06-20 15:14:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:37,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:37,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:37,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913587657] [2024-06-20 15:14:37,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913587657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:37,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:37,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383992032] [2024-06-20 15:14:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:37,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:37,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 365 transitions, 5369 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:37,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:37,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:37,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:38,152 INFO L124 PetriNetUnfolderBase]: 2098/3551 cut-off events. [2024-06-20 15:14:38,152 INFO L125 PetriNetUnfolderBase]: For 250171/250174 co-relation queries the response was YES. [2024-06-20 15:14:38,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24984 conditions, 3551 events. 2098/3551 cut-off events. For 250171/250174 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22031 event pairs, 421 based on Foata normal form. 1/3540 useless extension candidates. Maximal degree in co-relation 24856. Up to 2934 conditions per place. [2024-06-20 15:14:38,192 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 163 changer transitions 0/385 dead transitions. [2024-06-20 15:14:38,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 385 transitions, 6455 flow [2024-06-20 15:14:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:14:38,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:14:38,193 INFO L175 Difference]: Start difference. First operand has 287 places, 365 transitions, 5369 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:14:38,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 385 transitions, 6455 flow [2024-06-20 15:14:38,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 385 transitions, 5946 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:38,688 INFO L231 Difference]: Finished difference. Result has 288 places, 365 transitions, 5192 flow [2024-06-20 15:14:38,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5192, PETRI_PLACES=288, PETRI_TRANSITIONS=365} [2024-06-20 15:14:38,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 15:14:38,688 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 365 transitions, 5192 flow [2024-06-20 15:14:38,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:38,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:38,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:14:38,689 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)] === [2024-06-20 15:14:38,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -277289932, now seen corresponding path program 7 times [2024-06-20 15:14:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367664601] [2024-06-20 15:14:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:38,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:38,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:38,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367664601] [2024-06-20 15:14:38,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367664601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:38,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:38,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:38,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123549178] [2024-06-20 15:14:38,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:38,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:38,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:38,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:38,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:38,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:38,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 365 transitions, 5192 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:38,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:38,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:39,335 INFO L124 PetriNetUnfolderBase]: 2108/3569 cut-off events. [2024-06-20 15:14:39,335 INFO L125 PetriNetUnfolderBase]: For 258288/258288 co-relation queries the response was YES. [2024-06-20 15:14:39,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24843 conditions, 3569 events. 2108/3569 cut-off events. For 258288/258288 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22281 event pairs, 392 based on Foata normal form. 2/3563 useless extension candidates. Maximal degree in co-relation 24715. Up to 2910 conditions per place. [2024-06-20 15:14:39,378 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 106 changer transitions 0/391 dead transitions. [2024-06-20 15:14:39,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 391 transitions, 6366 flow [2024-06-20 15:14:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:14:39,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:14:39,379 INFO L175 Difference]: Start difference. First operand has 288 places, 365 transitions, 5192 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:14:39,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 391 transitions, 6366 flow [2024-06-20 15:14:39,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 391 transitions, 6032 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:39,842 INFO L231 Difference]: Finished difference. Result has 288 places, 369 transitions, 5143 flow [2024-06-20 15:14:39,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4858, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5143, PETRI_PLACES=288, PETRI_TRANSITIONS=369} [2024-06-20 15:14:39,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 15:14:39,842 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 369 transitions, 5143 flow [2024-06-20 15:14:39,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:39,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:39,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:14:39,843 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)] === [2024-06-20 15:14:39,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash -941709516, now seen corresponding path program 8 times [2024-06-20 15:14:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:39,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373362886] [2024-06-20 15:14:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373362886] [2024-06-20 15:14:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373362886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:39,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:39,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944243199] [2024-06-20 15:14:39,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:39,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:39,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:39,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:39,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 369 transitions, 5143 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:39,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:40,496 INFO L124 PetriNetUnfolderBase]: 2102/3561 cut-off events. [2024-06-20 15:14:40,496 INFO L125 PetriNetUnfolderBase]: For 258925/258925 co-relation queries the response was YES. [2024-06-20 15:14:40,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24634 conditions, 3561 events. 2102/3561 cut-off events. For 258925/258925 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22238 event pairs, 392 based on Foata normal form. 2/3555 useless extension candidates. Maximal degree in co-relation 24505. Up to 2905 conditions per place. [2024-06-20 15:14:40,538 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 103 changer transitions 0/388 dead transitions. [2024-06-20 15:14:40,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 388 transitions, 6241 flow [2024-06-20 15:14:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:14:40,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:14:40,540 INFO L175 Difference]: Start difference. First operand has 288 places, 369 transitions, 5143 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:14:40,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 388 transitions, 6241 flow [2024-06-20 15:14:41,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 388 transitions, 5894 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:41,039 INFO L231 Difference]: Finished difference. Result has 290 places, 369 transitions, 5009 flow [2024-06-20 15:14:41,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5009, PETRI_PLACES=290, PETRI_TRANSITIONS=369} [2024-06-20 15:14:41,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 15:14:41,040 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 369 transitions, 5009 flow [2024-06-20 15:14:41,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:41,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:41,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:41,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:14:41,041 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)] === [2024-06-20 15:14:41,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1481474854, now seen corresponding path program 9 times [2024-06-20 15:14:41,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:41,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194659672] [2024-06-20 15:14:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:41,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:41,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194659672] [2024-06-20 15:14:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194659672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:41,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:41,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:41,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243141438] [2024-06-20 15:14:41,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:41,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:41,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:41,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:41,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 369 transitions, 5009 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:41,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:41,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:41,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:41,741 INFO L124 PetriNetUnfolderBase]: 2138/3632 cut-off events. [2024-06-20 15:14:41,741 INFO L125 PetriNetUnfolderBase]: For 274450/274450 co-relation queries the response was YES. [2024-06-20 15:14:41,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25032 conditions, 3632 events. 2138/3632 cut-off events. For 274450/274450 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 22768 event pairs, 377 based on Foata normal form. 4/3634 useless extension candidates. Maximal degree in co-relation 24902. Up to 3214 conditions per place. [2024-06-20 15:14:41,787 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 52 changer transitions 0/399 dead transitions. [2024-06-20 15:14:41,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 399 transitions, 6173 flow [2024-06-20 15:14:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:14:41,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:14:41,789 INFO L175 Difference]: Start difference. First operand has 290 places, 369 transitions, 5009 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:14:41,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 399 transitions, 6173 flow [2024-06-20 15:14:42,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 399 transitions, 5951 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:42,362 INFO L231 Difference]: Finished difference. Result has 294 places, 383 transitions, 5139 flow [2024-06-20 15:14:42,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4797, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5139, PETRI_PLACES=294, PETRI_TRANSITIONS=383} [2024-06-20 15:14:42,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-20 15:14:42,363 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 383 transitions, 5139 flow [2024-06-20 15:14:42,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:42,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:42,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:14:42,365 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)] === [2024-06-20 15:14:42,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:42,365 INFO L85 PathProgramCache]: Analyzing trace with hash 80018466, now seen corresponding path program 10 times [2024-06-20 15:14:42,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:42,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885413068] [2024-06-20 15:14:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:42,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:42,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:42,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885413068] [2024-06-20 15:14:42,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885413068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:42,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:42,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039617009] [2024-06-20 15:14:42,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:42,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:42,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:42,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:42,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:42,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:42,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 383 transitions, 5139 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:42,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:42,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:43,077 INFO L124 PetriNetUnfolderBase]: 2188/3714 cut-off events. [2024-06-20 15:14:43,078 INFO L125 PetriNetUnfolderBase]: For 292880/292883 co-relation queries the response was YES. [2024-06-20 15:14:43,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26302 conditions, 3714 events. 2188/3714 cut-off events. For 292880/292883 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23377 event pairs, 386 based on Foata normal form. 4/3715 useless extension candidates. Maximal degree in co-relation 26170. Up to 3031 conditions per place. [2024-06-20 15:14:43,125 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 133 changer transitions 0/431 dead transitions. [2024-06-20 15:14:43,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 431 transitions, 6806 flow [2024-06-20 15:14:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:14:43,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 15:14:43,126 INFO L175 Difference]: Start difference. First operand has 294 places, 383 transitions, 5139 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:14:43,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 431 transitions, 6806 flow [2024-06-20 15:14:43,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 431 transitions, 6648 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:43,606 INFO L231 Difference]: Finished difference. Result has 298 places, 402 transitions, 5705 flow [2024-06-20 15:14:43,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5705, PETRI_PLACES=298, PETRI_TRANSITIONS=402} [2024-06-20 15:14:43,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-20 15:14:43,607 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 402 transitions, 5705 flow [2024-06-20 15:14:43,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:43,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:43,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:43,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:14:43,608 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)] === [2024-06-20 15:14:43,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1205570640, now seen corresponding path program 11 times [2024-06-20 15:14:43,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:43,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362917556] [2024-06-20 15:14:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:43,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:43,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:43,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362917556] [2024-06-20 15:14:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362917556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98457022] [2024-06-20 15:14:43,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:43,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:43,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:43,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 402 transitions, 5705 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:43,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:43,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:43,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:44,438 INFO L124 PetriNetUnfolderBase]: 2176/3697 cut-off events. [2024-06-20 15:14:44,439 INFO L125 PetriNetUnfolderBase]: For 296766/296766 co-relation queries the response was YES. [2024-06-20 15:14:44,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26950 conditions, 3697 events. 2176/3697 cut-off events. For 296766/296766 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23222 event pairs, 377 based on Foata normal form. 4/3699 useless extension candidates. Maximal degree in co-relation 26814. Up to 3021 conditions per place. [2024-06-20 15:14:44,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 129 changer transitions 0/433 dead transitions. [2024-06-20 15:14:44,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 433 transitions, 6785 flow [2024-06-20 15:14:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 15:14:44,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-20 15:14:44,483 INFO L175 Difference]: Start difference. First operand has 298 places, 402 transitions, 5705 flow. Second operand 8 states and 210 transitions. [2024-06-20 15:14:44,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 433 transitions, 6785 flow [2024-06-20 15:14:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 433 transitions, 6651 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:45,173 INFO L231 Difference]: Finished difference. Result has 304 places, 402 transitions, 5858 flow [2024-06-20 15:14:45,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5858, PETRI_PLACES=304, PETRI_TRANSITIONS=402} [2024-06-20 15:14:45,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-20 15:14:45,173 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 402 transitions, 5858 flow [2024-06-20 15:14:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:45,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:45,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:14:45,174 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)] === [2024-06-20 15:14:45,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash 806382934, now seen corresponding path program 12 times [2024-06-20 15:14:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:45,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83301397] [2024-06-20 15:14:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:45,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:45,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:45,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83301397] [2024-06-20 15:14:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83301397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:45,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:45,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61331559] [2024-06-20 15:14:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:45,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:45,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:45,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 402 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:45,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:45,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:45,975 INFO L124 PetriNetUnfolderBase]: 2170/3689 cut-off events. [2024-06-20 15:14:45,976 INFO L125 PetriNetUnfolderBase]: For 284674/284674 co-relation queries the response was YES. [2024-06-20 15:14:46,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26745 conditions, 3689 events. 2170/3689 cut-off events. For 284674/284674 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23182 event pairs, 377 based on Foata normal form. 2/3689 useless extension candidates. Maximal degree in co-relation 26608. Up to 3274 conditions per place. [2024-06-20 15:14:46,025 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 384 selfloop transitions, 35 changer transitions 0/427 dead transitions. [2024-06-20 15:14:46,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 427 transitions, 6760 flow [2024-06-20 15:14:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:14:46,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-20 15:14:46,026 INFO L175 Difference]: Start difference. First operand has 304 places, 402 transitions, 5858 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:14:46,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 427 transitions, 6760 flow [2024-06-20 15:14:46,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 427 transitions, 6392 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:46,684 INFO L231 Difference]: Finished difference. Result has 302 places, 402 transitions, 5574 flow [2024-06-20 15:14:46,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5574, PETRI_PLACES=302, PETRI_TRANSITIONS=402} [2024-06-20 15:14:46,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 15:14:46,685 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 402 transitions, 5574 flow [2024-06-20 15:14:46,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:46,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:46,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:46,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:14:46,686 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)] === [2024-06-20 15:14:46,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1966205021, now seen corresponding path program 6 times [2024-06-20 15:14:46,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:46,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928536284] [2024-06-20 15:14:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:46,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:46,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928536284] [2024-06-20 15:14:46,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928536284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:46,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:46,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305633254] [2024-06-20 15:14:46,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:46,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:46,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:46,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:46,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 402 transitions, 5574 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:46,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:46,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:46,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:47,392 INFO L124 PetriNetUnfolderBase]: 2167/3670 cut-off events. [2024-06-20 15:14:47,393 INFO L125 PetriNetUnfolderBase]: For 277070/277070 co-relation queries the response was YES. [2024-06-20 15:14:47,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26234 conditions, 3670 events. 2167/3670 cut-off events. For 277070/277070 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23058 event pairs, 389 based on Foata normal form. 1/3666 useless extension candidates. Maximal degree in co-relation 26097. Up to 3032 conditions per place. [2024-06-20 15:14:47,439 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 155 changer transitions 0/422 dead transitions. [2024-06-20 15:14:47,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 422 transitions, 6754 flow [2024-06-20 15:14:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:14:47,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:14:47,441 INFO L175 Difference]: Start difference. First operand has 302 places, 402 transitions, 5574 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:14:47,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 422 transitions, 6754 flow [2024-06-20 15:14:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 422 transitions, 6622 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:48,281 INFO L231 Difference]: Finished difference. Result has 303 places, 402 transitions, 5758 flow [2024-06-20 15:14:48,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5758, PETRI_PLACES=303, PETRI_TRANSITIONS=402} [2024-06-20 15:14:48,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-20 15:14:48,282 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 402 transitions, 5758 flow [2024-06-20 15:14:48,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:48,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:14:48,282 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)] === [2024-06-20 15:14:48,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1199609839, now seen corresponding path program 7 times [2024-06-20 15:14:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:48,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431845084] [2024-06-20 15:14:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:48,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431845084] [2024-06-20 15:14:48,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431845084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:48,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:48,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:48,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753946074] [2024-06-20 15:14:48,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:48,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:48,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:48,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 402 transitions, 5758 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:48,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:48,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:48,979 INFO L124 PetriNetUnfolderBase]: 2172/3679 cut-off events. [2024-06-20 15:14:48,980 INFO L125 PetriNetUnfolderBase]: For 284944/284944 co-relation queries the response was YES. [2024-06-20 15:14:49,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26653 conditions, 3679 events. 2172/3679 cut-off events. For 284944/284944 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23097 event pairs, 389 based on Foata normal form. 1/3675 useless extension candidates. Maximal degree in co-relation 26516. Up to 3038 conditions per place. [2024-06-20 15:14:49,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 168 changer transitions 0/425 dead transitions. [2024-06-20 15:14:49,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 425 transitions, 7006 flow [2024-06-20 15:14:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:14:49,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:14:49,024 INFO L175 Difference]: Start difference. First operand has 303 places, 402 transitions, 5758 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:14:49,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 425 transitions, 7006 flow [2024-06-20 15:14:49,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 425 transitions, 6786 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:49,655 INFO L231 Difference]: Finished difference. Result has 305 places, 405 transitions, 5938 flow [2024-06-20 15:14:49,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5938, PETRI_PLACES=305, PETRI_TRANSITIONS=405} [2024-06-20 15:14:49,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-20 15:14:49,657 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 405 transitions, 5938 flow [2024-06-20 15:14:49,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:49,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:49,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:49,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:14:49,657 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)] === [2024-06-20 15:14:49,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1200055309, now seen corresponding path program 8 times [2024-06-20 15:14:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:49,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226917117] [2024-06-20 15:14:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:49,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:49,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:49,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226917117] [2024-06-20 15:14:49,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226917117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:49,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:49,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176559289] [2024-06-20 15:14:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:49,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:49,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:49,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 405 transitions, 5938 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:49,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:49,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:49,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:50,439 INFO L124 PetriNetUnfolderBase]: 2169/3675 cut-off events. [2024-06-20 15:14:50,439 INFO L125 PetriNetUnfolderBase]: For 289652/289652 co-relation queries the response was YES. [2024-06-20 15:14:50,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26696 conditions, 3675 events. 2169/3675 cut-off events. For 289652/289652 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23065 event pairs, 389 based on Foata normal form. 1/3671 useless extension candidates. Maximal degree in co-relation 26558. Up to 3035 conditions per place. [2024-06-20 15:14:50,488 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 168 changer transitions 0/425 dead transitions. [2024-06-20 15:14:50,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 425 transitions, 7132 flow [2024-06-20 15:14:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:14:50,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:14:50,490 INFO L175 Difference]: Start difference. First operand has 305 places, 405 transitions, 5938 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:14:50,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 425 transitions, 7132 flow [2024-06-20 15:14:51,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 425 transitions, 6861 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:51,289 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 6009 flow [2024-06-20 15:14:51,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6009, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-06-20 15:14:51,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-20 15:14:51,290 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 6009 flow [2024-06-20 15:14:51,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:51,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:51,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:14:51,291 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)] === [2024-06-20 15:14:51,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1137395903, now seen corresponding path program 9 times [2024-06-20 15:14:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668474319] [2024-06-20 15:14:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:51,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:51,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:51,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668474319] [2024-06-20 15:14:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668474319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:51,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:51,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678988291] [2024-06-20 15:14:51,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:51,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:51,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:51,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:51,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 6009 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:51,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:51,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:52,171 INFO L124 PetriNetUnfolderBase]: 2166/3671 cut-off events. [2024-06-20 15:14:52,171 INFO L125 PetriNetUnfolderBase]: For 294037/294037 co-relation queries the response was YES. [2024-06-20 15:14:52,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26696 conditions, 3671 events. 2166/3671 cut-off events. For 294037/294037 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23043 event pairs, 389 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 26557. Up to 3032 conditions per place. [2024-06-20 15:14:52,226 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 158 changer transitions 0/425 dead transitions. [2024-06-20 15:14:52,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 425 transitions, 7207 flow [2024-06-20 15:14:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:14:52,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:14:52,227 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 6009 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:14:52,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 425 transitions, 7207 flow [2024-06-20 15:14:53,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 425 transitions, 6616 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:53,125 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5740 flow [2024-06-20 15:14:53,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5740, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-20 15:14:53,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 15:14:53,126 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5740 flow [2024-06-20 15:14:53,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:53,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:53,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:14:53,127 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)] === [2024-06-20 15:14:53,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash -597610787, now seen corresponding path program 10 times [2024-06-20 15:14:53,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:53,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653901246] [2024-06-20 15:14:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:53,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:53,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653901246] [2024-06-20 15:14:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653901246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:53,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:53,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109213548] [2024-06-20 15:14:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:53,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:53,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5740 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:53,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:53,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:53,946 INFO L124 PetriNetUnfolderBase]: 2163/3672 cut-off events. [2024-06-20 15:14:53,947 INFO L125 PetriNetUnfolderBase]: For 295046/295046 co-relation queries the response was YES. [2024-06-20 15:14:53,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26397 conditions, 3672 events. 2163/3672 cut-off events. For 295046/295046 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23089 event pairs, 377 based on Foata normal form. 1/3671 useless extension candidates. Maximal degree in co-relation 26258. Up to 3255 conditions per place. [2024-06-20 15:14:53,996 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 53 changer transitions 0/422 dead transitions. [2024-06-20 15:14:53,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 422 transitions, 6768 flow [2024-06-20 15:14:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:14:53,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-20 15:14:53,998 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5740 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:14:53,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 422 transitions, 6768 flow [2024-06-20 15:14:54,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 422 transitions, 6146 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:54,883 INFO L231 Difference]: Finished difference. Result has 306 places, 405 transitions, 5230 flow [2024-06-20 15:14:54,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5118, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5230, PETRI_PLACES=306, PETRI_TRANSITIONS=405} [2024-06-20 15:14:54,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-20 15:14:54,884 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 405 transitions, 5230 flow [2024-06-20 15:14:54,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:54,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:54,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:14:54,885 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)] === [2024-06-20 15:14:54,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1920550865, now seen corresponding path program 11 times [2024-06-20 15:14:54,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:54,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571401152] [2024-06-20 15:14:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:54,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571401152] [2024-06-20 15:14:55,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571401152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:55,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:55,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:55,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126832024] [2024-06-20 15:14:55,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:55,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:55,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:55,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:55,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 405 transitions, 5230 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:55,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:55,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:55,660 INFO L124 PetriNetUnfolderBase]: 2160/3668 cut-off events. [2024-06-20 15:14:55,660 INFO L125 PetriNetUnfolderBase]: For 293766/293766 co-relation queries the response was YES. [2024-06-20 15:14:55,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25950 conditions, 3668 events. 2160/3668 cut-off events. For 293766/293766 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23078 event pairs, 377 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 25812. Up to 3252 conditions per place. [2024-06-20 15:14:55,709 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 53 changer transitions 0/421 dead transitions. [2024-06-20 15:14:55,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 421 transitions, 6094 flow [2024-06-20 15:14:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 15:14:55,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 15:14:55,711 INFO L175 Difference]: Start difference. First operand has 306 places, 405 transitions, 5230 flow. Second operand 9 states and 205 transitions. [2024-06-20 15:14:55,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 421 transitions, 6094 flow [2024-06-20 15:14:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 421 transitions, 5954 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:56,561 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5202 flow [2024-06-20 15:14:56,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5202, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-20 15:14:56,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 15:14:56,562 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5202 flow [2024-06-20 15:14:56,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:56,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:56,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:14:56,562 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)] === [2024-06-20 15:14:56,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:56,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1363806639, now seen corresponding path program 12 times [2024-06-20 15:14:56,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:56,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044848759] [2024-06-20 15:14:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:56,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:56,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:56,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044848759] [2024-06-20 15:14:56,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044848759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:56,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:56,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:56,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239716728] [2024-06-20 15:14:56,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:56,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:56,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:56,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:56,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:56,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5202 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:56,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:56,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:57,358 INFO L124 PetriNetUnfolderBase]: 2157/3664 cut-off events. [2024-06-20 15:14:57,358 INFO L125 PetriNetUnfolderBase]: For 296915/296915 co-relation queries the response was YES. [2024-06-20 15:14:57,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 3664 events. 2157/3664 cut-off events. For 296915/296915 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23015 event pairs, 377 based on Foata normal form. 1/3663 useless extension candidates. Maximal degree in co-relation 25757. Up to 3107 conditions per place. [2024-06-20 15:14:57,408 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 312 selfloop transitions, 114 changer transitions 0/434 dead transitions. [2024-06-20 15:14:57,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 434 transitions, 6290 flow [2024-06-20 15:14:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 15:14:57,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-20 15:14:57,409 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5202 flow. Second operand 9 states and 221 transitions. [2024-06-20 15:14:57,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 434 transitions, 6290 flow [2024-06-20 15:14:58,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 434 transitions, 6150 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:58,283 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 5300 flow [2024-06-20 15:14:58,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5300, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-06-20 15:14:58,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-20 15:14:58,284 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 5300 flow [2024-06-20 15:14:58,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:58,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:58,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:14:58,284 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)] === [2024-06-20 15:14:58,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1372520739, now seen corresponding path program 13 times [2024-06-20 15:14:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:58,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190846176] [2024-06-20 15:14:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:58,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:58,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:58,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190846176] [2024-06-20 15:14:58,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190846176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:58,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:58,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:58,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122513196] [2024-06-20 15:14:58,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:58,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:58,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:58,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:58,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:14:58,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 5300 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:58,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:14:58,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:59,072 INFO L124 PetriNetUnfolderBase]: 2162/3673 cut-off events. [2024-06-20 15:14:59,072 INFO L125 PetriNetUnfolderBase]: For 304288/304288 co-relation queries the response was YES. [2024-06-20 15:14:59,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26216 conditions, 3673 events. 2162/3673 cut-off events. For 304288/304288 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23096 event pairs, 377 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 26076. Up to 3113 conditions per place. [2024-06-20 15:14:59,124 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 112 changer transitions 0/437 dead transitions. [2024-06-20 15:14:59,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 437 transitions, 6448 flow [2024-06-20 15:14:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 15:14:59,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:14:59,125 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 5300 flow. Second operand 9 states and 222 transitions. [2024-06-20 15:14:59,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 437 transitions, 6448 flow [2024-06-20 15:15:00,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 437 transitions, 6159 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:00,122 INFO L231 Difference]: Finished difference. Result has 308 places, 408 transitions, 5299 flow [2024-06-20 15:15:00,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5019, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5299, PETRI_PLACES=308, PETRI_TRANSITIONS=408} [2024-06-20 15:15:00,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-20 15:15:00,123 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 408 transitions, 5299 flow [2024-06-20 15:15:00,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:00,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:00,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:15:00,124 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)] === [2024-06-20 15:15:00,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 811157213, now seen corresponding path program 14 times [2024-06-20 15:15:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:00,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094622661] [2024-06-20 15:15:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094622661] [2024-06-20 15:15:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094622661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:00,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:00,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723838700] [2024-06-20 15:15:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:00,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:00,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:00,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 408 transitions, 5299 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:00,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:00,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:00,924 INFO L124 PetriNetUnfolderBase]: 2167/3683 cut-off events. [2024-06-20 15:15:00,924 INFO L125 PetriNetUnfolderBase]: For 304662/304665 co-relation queries the response was YES. [2024-06-20 15:15:00,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26228 conditions, 3683 events. 2167/3683 cut-off events. For 304662/304665 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23190 event pairs, 386 based on Foata normal form. 3/3683 useless extension candidates. Maximal degree in co-relation 26088. Up to 3119 conditions per place. [2024-06-20 15:15:00,974 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 312 selfloop transitions, 116 changer transitions 0/436 dead transitions. [2024-06-20 15:15:00,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 436 transitions, 6435 flow [2024-06-20 15:15:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:15:00,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:15:00,976 INFO L175 Difference]: Start difference. First operand has 308 places, 408 transitions, 5299 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:15:00,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 436 transitions, 6435 flow [2024-06-20 15:15:02,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 436 transitions, 6233 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:02,097 INFO L231 Difference]: Finished difference. Result has 309 places, 411 transitions, 5389 flow [2024-06-20 15:15:02,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5389, PETRI_PLACES=309, PETRI_TRANSITIONS=411} [2024-06-20 15:15:02,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-20 15:15:02,098 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 411 transitions, 5389 flow [2024-06-20 15:15:02,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:02,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:02,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:15:02,098 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)] === [2024-06-20 15:15:02,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash 87382795, now seen corresponding path program 15 times [2024-06-20 15:15:02,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:02,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653417063] [2024-06-20 15:15:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:02,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653417063] [2024-06-20 15:15:02,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653417063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:02,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:02,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:02,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359198026] [2024-06-20 15:15:02,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:02,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:02,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:02,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:02,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 411 transitions, 5389 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:02,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:02,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:02,887 INFO L124 PetriNetUnfolderBase]: 2164/3679 cut-off events. [2024-06-20 15:15:02,887 INFO L125 PetriNetUnfolderBase]: For 301643/301646 co-relation queries the response was YES. [2024-06-20 15:15:02,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26127 conditions, 3679 events. 2164/3679 cut-off events. For 301643/301646 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23197 event pairs, 386 based on Foata normal form. 3/3679 useless extension candidates. Maximal degree in co-relation 25987. Up to 3116 conditions per place. [2024-06-20 15:15:02,938 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 116 changer transitions 0/433 dead transitions. [2024-06-20 15:15:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 433 transitions, 6293 flow [2024-06-20 15:15:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-20 15:15:02,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 15:15:02,939 INFO L175 Difference]: Start difference. First operand has 309 places, 411 transitions, 5389 flow. Second operand 9 states and 213 transitions. [2024-06-20 15:15:02,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 433 transitions, 6293 flow [2024-06-20 15:15:03,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 433 transitions, 6071 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:04,000 INFO L231 Difference]: Finished difference. Result has 313 places, 411 transitions, 5405 flow [2024-06-20 15:15:04,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5405, PETRI_PLACES=313, PETRI_TRANSITIONS=411} [2024-06-20 15:15:04,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 15:15:04,001 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 411 transitions, 5405 flow [2024-06-20 15:15:04,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:04,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:04,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:15:04,001 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)] === [2024-06-20 15:15:04,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash -613418445, now seen corresponding path program 1 times [2024-06-20 15:15:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:04,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389255025] [2024-06-20 15:15:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:04,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:04,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:04,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389255025] [2024-06-20 15:15:04,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389255025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:04,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:04,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547403194] [2024-06-20 15:15:04,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:04,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:04,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:04,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:04,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 411 transitions, 5405 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:04,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:04,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:04,731 INFO L124 PetriNetUnfolderBase]: 2283/3875 cut-off events. [2024-06-20 15:15:04,731 INFO L125 PetriNetUnfolderBase]: For 398147/398147 co-relation queries the response was YES. [2024-06-20 15:15:04,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28545 conditions, 3875 events. 2283/3875 cut-off events. For 398147/398147 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24577 event pairs, 379 based on Foata normal form. 12/3882 useless extension candidates. Maximal degree in co-relation 28404. Up to 2750 conditions per place. [2024-06-20 15:15:04,781 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 193 changer transitions 0/445 dead transitions. [2024-06-20 15:15:04,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 445 transitions, 6637 flow [2024-06-20 15:15:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:15:04,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:15:04,782 INFO L175 Difference]: Start difference. First operand has 313 places, 411 transitions, 5405 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:15:04,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 445 transitions, 6637 flow [2024-06-20 15:15:05,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 445 transitions, 6182 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 15:15:05,538 INFO L231 Difference]: Finished difference. Result has 310 places, 415 transitions, 5429 flow [2024-06-20 15:15:05,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4950, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5429, PETRI_PLACES=310, PETRI_TRANSITIONS=415} [2024-06-20 15:15:05,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-20 15:15:05,541 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 415 transitions, 5429 flow [2024-06-20 15:15:05,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:05,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:05,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:15:05,542 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)] === [2024-06-20 15:15:05,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash 749067885, now seen corresponding path program 2 times [2024-06-20 15:15:05,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:05,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225320798] [2024-06-20 15:15:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:05,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:05,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:05,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225320798] [2024-06-20 15:15:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225320798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:05,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:05,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168727884] [2024-06-20 15:15:05,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:05,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:05,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:05,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:05,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 415 transitions, 5429 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:05,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:05,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:06,499 INFO L124 PetriNetUnfolderBase]: 2339/3966 cut-off events. [2024-06-20 15:15:06,499 INFO L125 PetriNetUnfolderBase]: For 424241/424241 co-relation queries the response was YES. [2024-06-20 15:15:06,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29361 conditions, 3966 events. 2339/3966 cut-off events. For 424241/424241 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25283 event pairs, 442 based on Foata normal form. 16/3977 useless extension candidates. Maximal degree in co-relation 29220. Up to 3241 conditions per place. [2024-06-20 15:15:06,545 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 176 changer transitions 0/439 dead transitions. [2024-06-20 15:15:06,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 439 transitions, 6413 flow [2024-06-20 15:15:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:15:06,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:15:06,547 INFO L175 Difference]: Start difference. First operand has 310 places, 415 transitions, 5429 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:15:06,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 439 transitions, 6413 flow [2024-06-20 15:15:07,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 439 transitions, 6164 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:07,336 INFO L231 Difference]: Finished difference. Result has 314 places, 417 transitions, 5588 flow [2024-06-20 15:15:07,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5588, PETRI_PLACES=314, PETRI_TRANSITIONS=417} [2024-06-20 15:15:07,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 15:15:07,337 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 417 transitions, 5588 flow [2024-06-20 15:15:07,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:07,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:07,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:15:07,337 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)] === [2024-06-20 15:15:07,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1199747789, now seen corresponding path program 3 times [2024-06-20 15:15:07,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:07,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133838842] [2024-06-20 15:15:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:07,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:07,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133838842] [2024-06-20 15:15:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133838842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201067593] [2024-06-20 15:15:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:07,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:07,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 417 transitions, 5588 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:07,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:07,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:08,172 INFO L124 PetriNetUnfolderBase]: 2379/4030 cut-off events. [2024-06-20 15:15:08,173 INFO L125 PetriNetUnfolderBase]: For 420303/420303 co-relation queries the response was YES. [2024-06-20 15:15:08,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30180 conditions, 4030 events. 2379/4030 cut-off events. For 420303/420303 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25746 event pairs, 438 based on Foata normal form. 12/4037 useless extension candidates. Maximal degree in co-relation 30037. Up to 3245 conditions per place. [2024-06-20 15:15:08,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 180 changer transitions 0/444 dead transitions. [2024-06-20 15:15:08,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 444 transitions, 6604 flow [2024-06-20 15:15:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:15:08,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:15:08,229 INFO L175 Difference]: Start difference. First operand has 314 places, 417 transitions, 5588 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:15:08,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 444 transitions, 6604 flow [2024-06-20 15:15:09,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 444 transitions, 6232 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:09,093 INFO L231 Difference]: Finished difference. Result has 316 places, 419 transitions, 5635 flow [2024-06-20 15:15:09,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5635, PETRI_PLACES=316, PETRI_TRANSITIONS=419} [2024-06-20 15:15:09,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 15:15:09,094 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 419 transitions, 5635 flow [2024-06-20 15:15:09,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:09,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:09,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:15:09,094 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)] === [2024-06-20 15:15:09,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 28126859, now seen corresponding path program 4 times [2024-06-20 15:15:09,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:09,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619546271] [2024-06-20 15:15:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:09,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:09,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:09,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619546271] [2024-06-20 15:15:09,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619546271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:09,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:09,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763837399] [2024-06-20 15:15:09,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:09,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:09,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 419 transitions, 5635 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:09,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:09,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:09,981 INFO L124 PetriNetUnfolderBase]: 2435/4127 cut-off events. [2024-06-20 15:15:09,981 INFO L125 PetriNetUnfolderBase]: For 446024/446024 co-relation queries the response was YES. [2024-06-20 15:15:10,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30880 conditions, 4127 events. 2435/4127 cut-off events. For 446024/446024 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26459 event pairs, 448 based on Foata normal form. 16/4141 useless extension candidates. Maximal degree in co-relation 30736. Up to 3619 conditions per place. [2024-06-20 15:15:10,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 55 changer transitions 0/441 dead transitions. [2024-06-20 15:15:10,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 441 transitions, 6625 flow [2024-06-20 15:15:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:15:10,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 15:15:10,043 INFO L175 Difference]: Start difference. First operand has 316 places, 419 transitions, 5635 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:15:10,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 441 transitions, 6625 flow [2024-06-20 15:15:10,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 441 transitions, 6234 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:10,961 INFO L231 Difference]: Finished difference. Result has 319 places, 421 transitions, 5418 flow [2024-06-20 15:15:10,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5418, PETRI_PLACES=319, PETRI_TRANSITIONS=421} [2024-06-20 15:15:10,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-20 15:15:10,962 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 421 transitions, 5418 flow [2024-06-20 15:15:10,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:10,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:10,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:10,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:15:10,963 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)] === [2024-06-20 15:15:10,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:10,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1920688815, now seen corresponding path program 5 times [2024-06-20 15:15:10,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:10,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824458268] [2024-06-20 15:15:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:10,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:11,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:11,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824458268] [2024-06-20 15:15:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824458268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:11,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:11,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:11,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454875551] [2024-06-20 15:15:11,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:11,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:11,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 421 transitions, 5418 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:11,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:11,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:11,885 INFO L124 PetriNetUnfolderBase]: 2521/4265 cut-off events. [2024-06-20 15:15:11,885 INFO L125 PetriNetUnfolderBase]: For 472679/472679 co-relation queries the response was YES. [2024-06-20 15:15:11,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32221 conditions, 4265 events. 2521/4265 cut-off events. For 472679/472679 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27450 event pairs, 458 based on Foata normal form. 12/4275 useless extension candidates. Maximal degree in co-relation 32076. Up to 3579 conditions per place. [2024-06-20 15:15:11,946 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 62 changer transitions 0/448 dead transitions. [2024-06-20 15:15:11,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 448 transitions, 6648 flow [2024-06-20 15:15:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:15:11,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-20 15:15:11,947 INFO L175 Difference]: Start difference. First operand has 319 places, 421 transitions, 5418 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:15:11,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 448 transitions, 6648 flow [2024-06-20 15:15:12,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 448 transitions, 6510 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:12,914 INFO L231 Difference]: Finished difference. Result has 321 places, 424 transitions, 5497 flow [2024-06-20 15:15:12,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5497, PETRI_PLACES=321, PETRI_TRANSITIONS=424} [2024-06-20 15:15:12,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-20 15:15:12,914 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 424 transitions, 5497 flow [2024-06-20 15:15:12,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:12,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:12,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:15:12,915 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)] === [2024-06-20 15:15:12,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-20 15:15:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:12,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235200623] [2024-06-20 15:15:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:12,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235200623] [2024-06-20 15:15:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235200623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:13,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:13,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160759513] [2024-06-20 15:15:13,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:13,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:13,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:13,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 424 transitions, 5497 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:13,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:13,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:13,854 INFO L124 PetriNetUnfolderBase]: 2627/4445 cut-off events. [2024-06-20 15:15:13,854 INFO L125 PetriNetUnfolderBase]: For 524105/524105 co-relation queries the response was YES. [2024-06-20 15:15:13,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34256 conditions, 4445 events. 2627/4445 cut-off events. For 524105/524105 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28777 event pairs, 493 based on Foata normal form. 12/4455 useless extension candidates. Maximal degree in co-relation 34110. Up to 3795 conditions per place. [2024-06-20 15:15:13,918 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 37 changer transitions 0/452 dead transitions. [2024-06-20 15:15:13,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 452 transitions, 6745 flow [2024-06-20 15:15:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:15:13,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 15:15:13,919 INFO L175 Difference]: Start difference. First operand has 321 places, 424 transitions, 5497 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:15:13,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 452 transitions, 6745 flow [2024-06-20 15:15:15,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 452 transitions, 6637 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:15,067 INFO L231 Difference]: Finished difference. Result has 326 places, 428 transitions, 5577 flow [2024-06-20 15:15:15,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5389, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5577, PETRI_PLACES=326, PETRI_TRANSITIONS=428} [2024-06-20 15:15:15,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-20 15:15:15,067 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 428 transitions, 5577 flow [2024-06-20 15:15:15,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:15,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:15,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:15:15,068 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)] === [2024-06-20 15:15:15,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1363796719, now seen corresponding path program 6 times [2024-06-20 15:15:15,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:15,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437126875] [2024-06-20 15:15:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:15,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:15,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:15,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437126875] [2024-06-20 15:15:15,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437126875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:15,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:15,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:15,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414792918] [2024-06-20 15:15:15,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:15,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:15,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:15,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:15,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:15,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 428 transitions, 5577 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:15,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:15,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:16,115 INFO L124 PetriNetUnfolderBase]: 2670/4526 cut-off events. [2024-06-20 15:15:16,115 INFO L125 PetriNetUnfolderBase]: For 544831/544831 co-relation queries the response was YES. [2024-06-20 15:15:16,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34850 conditions, 4526 events. 2670/4526 cut-off events. For 544831/544831 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29511 event pairs, 517 based on Foata normal form. 16/4540 useless extension candidates. Maximal degree in co-relation 34701. Up to 3782 conditions per place. [2024-06-20 15:15:16,168 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 124 changer transitions 0/462 dead transitions. [2024-06-20 15:15:16,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 462 transitions, 6649 flow [2024-06-20 15:15:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 15:15:16,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-20 15:15:16,169 INFO L175 Difference]: Start difference. First operand has 326 places, 428 transitions, 5577 flow. Second operand 9 states and 223 transitions. [2024-06-20 15:15:16,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 462 transitions, 6649 flow [2024-06-20 15:15:17,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 462 transitions, 6583 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:17,347 INFO L231 Difference]: Finished difference. Result has 331 places, 430 transitions, 5835 flow [2024-06-20 15:15:17,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5835, PETRI_PLACES=331, PETRI_TRANSITIONS=430} [2024-06-20 15:15:17,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-20 15:15:17,348 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 430 transitions, 5835 flow [2024-06-20 15:15:17,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:17,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:15:17,348 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)] === [2024-06-20 15:15:17,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1214159469, now seen corresponding path program 7 times [2024-06-20 15:15:17,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:17,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385179001] [2024-06-20 15:15:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:17,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:17,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385179001] [2024-06-20 15:15:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385179001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:17,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:17,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:17,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076194387] [2024-06-20 15:15:17,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:17,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:17,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 430 transitions, 5835 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:17,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:18,325 INFO L124 PetriNetUnfolderBase]: 2723/4612 cut-off events. [2024-06-20 15:15:18,325 INFO L125 PetriNetUnfolderBase]: For 551329/551329 co-relation queries the response was YES. [2024-06-20 15:15:18,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36060 conditions, 4612 events. 2723/4612 cut-off events. For 551329/551329 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30061 event pairs, 438 based on Foata normal form. 12/4622 useless extension candidates. Maximal degree in co-relation 35909. Up to 3473 conditions per place. [2024-06-20 15:15:18,395 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 141 changer transitions 0/471 dead transitions. [2024-06-20 15:15:18,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 471 transitions, 7133 flow [2024-06-20 15:15:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-20 15:15:18,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233062330623306 [2024-06-20 15:15:18,396 INFO L175 Difference]: Start difference. First operand has 331 places, 430 transitions, 5835 flow. Second operand 9 states and 230 transitions. [2024-06-20 15:15:18,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 471 transitions, 7133 flow [2024-06-20 15:15:19,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 471 transitions, 6859 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:19,764 INFO L231 Difference]: Finished difference. Result has 333 places, 432 transitions, 5913 flow [2024-06-20 15:15:19,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5913, PETRI_PLACES=333, PETRI_TRANSITIONS=432} [2024-06-20 15:15:19,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-20 15:15:19,765 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 432 transitions, 5913 flow [2024-06-20 15:15:19,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:19,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:19,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:19,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:15:19,765 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)] === [2024-06-20 15:15:19,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1358219137, now seen corresponding path program 2 times [2024-06-20 15:15:19,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:19,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197660054] [2024-06-20 15:15:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:19,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:19,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:19,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197660054] [2024-06-20 15:15:19,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197660054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:19,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:19,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:19,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814242661] [2024-06-20 15:15:19,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:19,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:19,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:19,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:19,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:19,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 432 transitions, 5913 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:19,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:19,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:19,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:21,025 INFO L124 PetriNetUnfolderBase]: 2905/4905 cut-off events. [2024-06-20 15:15:21,025 INFO L125 PetriNetUnfolderBase]: For 609911/609911 co-relation queries the response was YES. [2024-06-20 15:15:21,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39154 conditions, 4905 events. 2905/4905 cut-off events. For 609911/609911 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32275 event pairs, 534 based on Foata normal form. 12/4915 useless extension candidates. Maximal degree in co-relation 39002. Up to 3999 conditions per place. [2024-06-20 15:15:21,086 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 49 changer transitions 0/469 dead transitions. [2024-06-20 15:15:21,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 469 transitions, 7387 flow [2024-06-20 15:15:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:15:21,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:15:21,087 INFO L175 Difference]: Start difference. First operand has 333 places, 432 transitions, 5913 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:15:21,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 469 transitions, 7387 flow [2024-06-20 15:15:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 469 transitions, 7166 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:22,421 INFO L231 Difference]: Finished difference. Result has 338 places, 443 transitions, 6084 flow [2024-06-20 15:15:22,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6084, PETRI_PLACES=338, PETRI_TRANSITIONS=443} [2024-06-20 15:15:22,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-20 15:15:22,421 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 443 transitions, 6084 flow [2024-06-20 15:15:22,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:22,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:22,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:22,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:15:22,422 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)] === [2024-06-20 15:15:22,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1411749217, now seen corresponding path program 3 times [2024-06-20 15:15:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:22,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942602220] [2024-06-20 15:15:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:22,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:22,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942602220] [2024-06-20 15:15:22,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942602220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:22,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:22,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:22,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71781933] [2024-06-20 15:15:22,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:22,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:22,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:22,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 443 transitions, 6084 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:22,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:22,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:22,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:23,545 INFO L124 PetriNetUnfolderBase]: 3024/5117 cut-off events. [2024-06-20 15:15:23,545 INFO L125 PetriNetUnfolderBase]: For 662720/662720 co-relation queries the response was YES. [2024-06-20 15:15:23,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41892 conditions, 5117 events. 3024/5117 cut-off events. For 662720/662720 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34081 event pairs, 467 based on Foata normal form. 12/5127 useless extension candidates. Maximal degree in co-relation 41736. Up to 3727 conditions per place. [2024-06-20 15:15:23,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 372 selfloop transitions, 103 changer transitions 0/483 dead transitions. [2024-06-20 15:15:23,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 483 transitions, 7460 flow [2024-06-20 15:15:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:15:23,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-20 15:15:23,634 INFO L175 Difference]: Start difference. First operand has 338 places, 443 transitions, 6084 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:15:23,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 483 transitions, 7460 flow [2024-06-20 15:15:25,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 483 transitions, 7368 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:25,430 INFO L231 Difference]: Finished difference. Result has 344 places, 448 transitions, 6392 flow [2024-06-20 15:15:25,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6002, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6392, PETRI_PLACES=344, PETRI_TRANSITIONS=448} [2024-06-20 15:15:25,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-20 15:15:25,431 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 448 transitions, 6392 flow [2024-06-20 15:15:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:25,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:25,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:25,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:15:25,432 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)] === [2024-06-20 15:15:25,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1677446497, now seen corresponding path program 4 times [2024-06-20 15:15:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930486468] [2024-06-20 15:15:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:25,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:25,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:25,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930486468] [2024-06-20 15:15:25,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930486468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:25,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:25,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297879026] [2024-06-20 15:15:25,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:25,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:25,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:25,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:25,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:25,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 448 transitions, 6392 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:25,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:25,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:25,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:26,631 INFO L124 PetriNetUnfolderBase]: 3084/5232 cut-off events. [2024-06-20 15:15:26,632 INFO L125 PetriNetUnfolderBase]: For 670756/670759 co-relation queries the response was YES. [2024-06-20 15:15:26,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43430 conditions, 5232 events. 3084/5232 cut-off events. For 670756/670759 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 35118 event pairs, 494 based on Foata normal form. 14/5243 useless extension candidates. Maximal degree in co-relation 43271. Up to 3674 conditions per place. [2024-06-20 15:15:26,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 381 selfloop transitions, 97 changer transitions 0/486 dead transitions. [2024-06-20 15:15:26,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 486 transitions, 7964 flow [2024-06-20 15:15:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 15:15:26,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-20 15:15:26,706 INFO L175 Difference]: Start difference. First operand has 344 places, 448 transitions, 6392 flow. Second operand 7 states and 185 transitions. [2024-06-20 15:15:26,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 486 transitions, 7964 flow [2024-06-20 15:15:28,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 486 transitions, 7809 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:28,654 INFO L231 Difference]: Finished difference. Result has 349 places, 454 transitions, 6630 flow [2024-06-20 15:15:28,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6249, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6630, PETRI_PLACES=349, PETRI_TRANSITIONS=454} [2024-06-20 15:15:28,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-20 15:15:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 454 transitions, 6630 flow [2024-06-20 15:15:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:28,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:28,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:28,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:15:28,655 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)] === [2024-06-20 15:15:28,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1491753271, now seen corresponding path program 1 times [2024-06-20 15:15:28,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:28,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969801898] [2024-06-20 15:15:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:28,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969801898] [2024-06-20 15:15:28,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969801898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:28,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:28,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:28,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318070938] [2024-06-20 15:15:28,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:28,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:28,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:28,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 454 transitions, 6630 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:28,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:28,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:28,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:29,733 INFO L124 PetriNetUnfolderBase]: 3105/5257 cut-off events. [2024-06-20 15:15:29,733 INFO L125 PetriNetUnfolderBase]: For 634806/634806 co-relation queries the response was YES. [2024-06-20 15:15:29,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44413 conditions, 5257 events. 3105/5257 cut-off events. For 634806/634806 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35375 event pairs, 646 based on Foata normal form. 1/5250 useless extension candidates. Maximal degree in co-relation 44250. Up to 4582 conditions per place. [2024-06-20 15:15:29,815 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 105 changer transitions 0/480 dead transitions. [2024-06-20 15:15:29,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 480 transitions, 7940 flow [2024-06-20 15:15:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:15:29,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:15:29,817 INFO L175 Difference]: Start difference. First operand has 349 places, 454 transitions, 6630 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:15:29,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 480 transitions, 7940 flow [2024-06-20 15:15:31,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 480 transitions, 7801 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 15:15:31,814 INFO L231 Difference]: Finished difference. Result has 354 places, 463 transitions, 6910 flow [2024-06-20 15:15:31,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6491, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6910, PETRI_PLACES=354, PETRI_TRANSITIONS=463} [2024-06-20 15:15:31,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 15:15:31,815 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 463 transitions, 6910 flow [2024-06-20 15:15:31,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:31,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:31,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:31,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:15:31,816 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)] === [2024-06-20 15:15:31,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash -552932255, now seen corresponding path program 1 times [2024-06-20 15:15:31,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:31,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280121196] [2024-06-20 15:15:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:31,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:31,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280121196] [2024-06-20 15:15:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280121196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:31,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:31,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841419799] [2024-06-20 15:15:31,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:31,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:31,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:31,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:31,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 463 transitions, 6910 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:31,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:31,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:31,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:32,961 INFO L124 PetriNetUnfolderBase]: 3118/5289 cut-off events. [2024-06-20 15:15:32,961 INFO L125 PetriNetUnfolderBase]: For 651702/651702 co-relation queries the response was YES. [2024-06-20 15:15:33,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44822 conditions, 5289 events. 3118/5289 cut-off events. For 651702/651702 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35599 event pairs, 627 based on Foata normal form. 1/5288 useless extension candidates. Maximal degree in co-relation 44656. Up to 4703 conditions per place. [2024-06-20 15:15:33,043 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 61 changer transitions 0/497 dead transitions. [2024-06-20 15:15:33,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 497 transitions, 8264 flow [2024-06-20 15:15:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:15:33,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:15:33,044 INFO L175 Difference]: Start difference. First operand has 354 places, 463 transitions, 6910 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:15:33,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 497 transitions, 8264 flow [2024-06-20 15:15:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 497 transitions, 8114 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:35,128 INFO L231 Difference]: Finished difference. Result has 358 places, 469 transitions, 7016 flow [2024-06-20 15:15:35,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7016, PETRI_PLACES=358, PETRI_TRANSITIONS=469} [2024-06-20 15:15:35,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-20 15:15:35,129 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 469 transitions, 7016 flow [2024-06-20 15:15:35,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:35,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:35,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:35,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:15:35,130 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)] === [2024-06-20 15:15:35,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1409757315, now seen corresponding path program 2 times [2024-06-20 15:15:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325479538] [2024-06-20 15:15:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:35,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:35,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:35,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325479538] [2024-06-20 15:15:35,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325479538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:35,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:35,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:35,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416184296] [2024-06-20 15:15:35,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:35,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:35,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:35,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:35,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 469 transitions, 7016 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:35,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:35,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:35,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:36,276 INFO L124 PetriNetUnfolderBase]: 3123/5298 cut-off events. [2024-06-20 15:15:36,276 INFO L125 PetriNetUnfolderBase]: For 653931/653931 co-relation queries the response was YES. [2024-06-20 15:15:36,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45227 conditions, 5298 events. 3123/5298 cut-off events. For 653931/653931 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35666 event pairs, 626 based on Foata normal form. 1/5297 useless extension candidates. Maximal degree in co-relation 45061. Up to 4752 conditions per place. [2024-06-20 15:15:36,354 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 448 selfloop transitions, 43 changer transitions 0/499 dead transitions. [2024-06-20 15:15:36,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 499 transitions, 8116 flow [2024-06-20 15:15:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:15:36,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:15:36,355 INFO L175 Difference]: Start difference. First operand has 358 places, 469 transitions, 7016 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:15:36,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 499 transitions, 8116 flow [2024-06-20 15:15:38,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 499 transitions, 7906 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:38,525 INFO L231 Difference]: Finished difference. Result has 361 places, 472 transitions, 6954 flow [2024-06-20 15:15:38,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6954, PETRI_PLACES=361, PETRI_TRANSITIONS=472} [2024-06-20 15:15:38,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 15:15:38,525 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 472 transitions, 6954 flow [2024-06-20 15:15:38,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:38,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:38,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:15:38,526 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)] === [2024-06-20 15:15:38,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1232625609, now seen corresponding path program 2 times [2024-06-20 15:15:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:38,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95490062] [2024-06-20 15:15:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:38,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:38,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95490062] [2024-06-20 15:15:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95490062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:38,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:38,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:38,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332465569] [2024-06-20 15:15:38,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:38,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:38,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 472 transitions, 6954 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:38,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:39,634 INFO L124 PetriNetUnfolderBase]: 3141/5325 cut-off events. [2024-06-20 15:15:39,634 INFO L125 PetriNetUnfolderBase]: For 670995/670995 co-relation queries the response was YES. [2024-06-20 15:15:39,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45596 conditions, 5325 events. 3141/5325 cut-off events. For 670995/670995 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35847 event pairs, 627 based on Foata normal form. 1/5324 useless extension candidates. Maximal degree in co-relation 45430. Up to 4729 conditions per place. [2024-06-20 15:15:39,717 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 71 changer transitions 0/512 dead transitions. [2024-06-20 15:15:39,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 512 transitions, 8543 flow [2024-06-20 15:15:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-20 15:15:39,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-20 15:15:39,718 INFO L175 Difference]: Start difference. First operand has 361 places, 472 transitions, 6954 flow. Second operand 10 states and 239 transitions. [2024-06-20 15:15:39,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 512 transitions, 8543 flow [2024-06-20 15:15:41,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 512 transitions, 8423 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:41,944 INFO L231 Difference]: Finished difference. Result has 364 places, 481 transitions, 7111 flow [2024-06-20 15:15:41,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7111, PETRI_PLACES=364, PETRI_TRANSITIONS=481} [2024-06-20 15:15:41,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 15:15:41,945 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 481 transitions, 7111 flow [2024-06-20 15:15:41,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:41,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:41,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:15:41,945 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)] === [2024-06-20 15:15:41,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1232625795, now seen corresponding path program 3 times [2024-06-20 15:15:41,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:41,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134028761] [2024-06-20 15:15:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:41,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:42,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:42,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134028761] [2024-06-20 15:15:42,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134028761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:42,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:42,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939588976] [2024-06-20 15:15:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:42,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:42,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 481 transitions, 7111 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:42,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:42,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:43,151 INFO L124 PetriNetUnfolderBase]: 3146/5334 cut-off events. [2024-06-20 15:15:43,151 INFO L125 PetriNetUnfolderBase]: For 684277/684277 co-relation queries the response was YES. [2024-06-20 15:15:43,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45837 conditions, 5334 events. 3146/5334 cut-off events. For 684277/684277 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35915 event pairs, 626 based on Foata normal form. 1/5333 useless extension candidates. Maximal degree in co-relation 45670. Up to 4781 conditions per place. [2024-06-20 15:15:43,239 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 47 changer transitions 0/514 dead transitions. [2024-06-20 15:15:43,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 514 transitions, 8253 flow [2024-06-20 15:15:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-20 15:15:43,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-20 15:15:43,240 INFO L175 Difference]: Start difference. First operand has 364 places, 481 transitions, 7111 flow. Second operand 11 states and 249 transitions. [2024-06-20 15:15:43,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 514 transitions, 8253 flow [2024-06-20 15:15:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 514 transitions, 8063 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:45,704 INFO L231 Difference]: Finished difference. Result has 369 places, 484 transitions, 7083 flow [2024-06-20 15:15:45,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7083, PETRI_PLACES=369, PETRI_TRANSITIONS=484} [2024-06-20 15:15:45,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-20 15:15:45,704 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 484 transitions, 7083 flow [2024-06-20 15:15:45,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:45,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:45,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:45,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:15:45,705 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)] === [2024-06-20 15:15:45,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1232388459, now seen corresponding path program 3 times [2024-06-20 15:15:45,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:45,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57884070] [2024-06-20 15:15:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:45,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:45,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:45,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57884070] [2024-06-20 15:15:45,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57884070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:45,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:45,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:45,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576923033] [2024-06-20 15:15:45,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:45,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:45,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:45,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:45,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:45,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 484 transitions, 7083 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:45,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:45,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:45,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:46,835 INFO L124 PetriNetUnfolderBase]: 3143/5330 cut-off events. [2024-06-20 15:15:46,835 INFO L125 PetriNetUnfolderBase]: For 692654/692654 co-relation queries the response was YES. [2024-06-20 15:15:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45764 conditions, 5330 events. 3143/5330 cut-off events. For 692654/692654 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35910 event pairs, 627 based on Foata normal form. 1/5329 useless extension candidates. Maximal degree in co-relation 45596. Up to 4733 conditions per place. [2024-06-20 15:15:46,918 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 73 changer transitions 0/515 dead transitions. [2024-06-20 15:15:46,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 515 transitions, 8365 flow [2024-06-20 15:15:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-20 15:15:46,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-20 15:15:46,919 INFO L175 Difference]: Start difference. First operand has 369 places, 484 transitions, 7083 flow. Second operand 11 states and 254 transitions. [2024-06-20 15:15:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 515 transitions, 8365 flow [2024-06-20 15:15:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 515 transitions, 8219 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:48,980 INFO L231 Difference]: Finished difference. Result has 371 places, 484 transitions, 7089 flow [2024-06-20 15:15:48,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6937, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7089, PETRI_PLACES=371, PETRI_TRANSITIONS=484} [2024-06-20 15:15:48,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 15:15:48,981 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 484 transitions, 7089 flow [2024-06-20 15:15:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:48,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:48,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:15:48,982 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)] === [2024-06-20 15:15:48,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1498415145, now seen corresponding path program 1 times [2024-06-20 15:15:48,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:48,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636290638] [2024-06-20 15:15:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:49,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636290638] [2024-06-20 15:15:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636290638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530483298] [2024-06-20 15:15:49,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:49,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:49,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:49,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 484 transitions, 7089 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:49,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:49,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:49,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:50,293 INFO L124 PetriNetUnfolderBase]: 3223/5472 cut-off events. [2024-06-20 15:15:50,294 INFO L125 PetriNetUnfolderBase]: For 730630/730630 co-relation queries the response was YES. [2024-06-20 15:15:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46629 conditions, 5472 events. 3223/5472 cut-off events. For 730630/730630 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 37121 event pairs, 573 based on Foata normal form. 6/5476 useless extension candidates. Maximal degree in co-relation 46460. Up to 4679 conditions per place. [2024-06-20 15:15:50,380 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 461 selfloop transitions, 55 changer transitions 0/524 dead transitions. [2024-06-20 15:15:50,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 524 transitions, 8507 flow [2024-06-20 15:15:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:15:50,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:15:50,381 INFO L175 Difference]: Start difference. First operand has 371 places, 484 transitions, 7089 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:15:50,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 524 transitions, 8507 flow [2024-06-20 15:15:52,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 524 transitions, 8351 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:52,703 INFO L231 Difference]: Finished difference. Result has 370 places, 488 transitions, 7136 flow [2024-06-20 15:15:52,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7136, PETRI_PLACES=370, PETRI_TRANSITIONS=488} [2024-06-20 15:15:52,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-20 15:15:52,703 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 488 transitions, 7136 flow [2024-06-20 15:15:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:52,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:52,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:52,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:15:52,705 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)] === [2024-06-20 15:15:52,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1314593851, now seen corresponding path program 2 times [2024-06-20 15:15:52,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:52,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263431910] [2024-06-20 15:15:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:52,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263431910] [2024-06-20 15:15:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263431910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:52,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024493342] [2024-06-20 15:15:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:52,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:52,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:52,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:52,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 488 transitions, 7136 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:52,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:52,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:52,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:53,916 INFO L124 PetriNetUnfolderBase]: 3271/5552 cut-off events. [2024-06-20 15:15:53,917 INFO L125 PetriNetUnfolderBase]: For 746675/746675 co-relation queries the response was YES. [2024-06-20 15:15:53,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47455 conditions, 5552 events. 3271/5552 cut-off events. For 746675/746675 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37739 event pairs, 653 based on Foata normal form. 6/5556 useless extension candidates. Maximal degree in co-relation 47284. Up to 4918 conditions per place. [2024-06-20 15:15:54,006 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 48 changer transitions 0/521 dead transitions. [2024-06-20 15:15:54,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 521 transitions, 8320 flow [2024-06-20 15:15:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 15:15:54,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 15:15:54,007 INFO L175 Difference]: Start difference. First operand has 370 places, 488 transitions, 7136 flow. Second operand 8 states and 196 transitions. [2024-06-20 15:15:54,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 521 transitions, 8320 flow [2024-06-20 15:15:56,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 521 transitions, 8213 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:56,529 INFO L231 Difference]: Finished difference. Result has 374 places, 490 transitions, 7179 flow [2024-06-20 15:15:56,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7179, PETRI_PLACES=374, PETRI_TRANSITIONS=490} [2024-06-20 15:15:56,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 15:15:56,530 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 490 transitions, 7179 flow [2024-06-20 15:15:56,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:56,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:56,531 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] [2024-06-20 15:15:56,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:15:56,531 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)] === [2024-06-20 15:15:56,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:56,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1173546649, now seen corresponding path program 4 times [2024-06-20 15:15:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:56,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424845587] [2024-06-20 15:15:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:56,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:56,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424845587] [2024-06-20 15:15:56,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424845587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:56,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:56,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562147174] [2024-06-20 15:15:56,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:56,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:15:56,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 490 transitions, 7179 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:56,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:56,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:15:56,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:57,723 INFO L124 PetriNetUnfolderBase]: 3300/5586 cut-off events. [2024-06-20 15:15:57,724 INFO L125 PetriNetUnfolderBase]: For 752099/752099 co-relation queries the response was YES. [2024-06-20 15:15:57,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48093 conditions, 5586 events. 3300/5586 cut-off events. For 752099/752099 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38062 event pairs, 677 based on Foata normal form. 1/5579 useless extension candidates. Maximal degree in co-relation 47920. Up to 4742 conditions per place. [2024-06-20 15:15:57,804 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 162 changer transitions 0/525 dead transitions. [2024-06-20 15:15:57,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 525 transitions, 9060 flow [2024-06-20 15:15:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:15:57,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:15:57,805 INFO L175 Difference]: Start difference. First operand has 374 places, 490 transitions, 7179 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:15:57,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 525 transitions, 9060 flow [2024-06-20 15:16:00,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 525 transitions, 8958 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:00,008 INFO L231 Difference]: Finished difference. Result has 376 places, 502 transitions, 7604 flow [2024-06-20 15:16:00,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7077, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7604, PETRI_PLACES=376, PETRI_TRANSITIONS=502} [2024-06-20 15:16:00,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-20 15:16:00,008 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 502 transitions, 7604 flow [2024-06-20 15:16:00,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:00,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:00,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:16:00,009 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)] === [2024-06-20 15:16:00,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 421330035, now seen corresponding path program 5 times [2024-06-20 15:16:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:00,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762692305] [2024-06-20 15:16:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:00,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762692305] [2024-06-20 15:16:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762692305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:00,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685048473] [2024-06-20 15:16:00,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:00,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:00,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:00,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 502 transitions, 7604 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:00,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:00,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:00,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:01,158 INFO L124 PetriNetUnfolderBase]: 3313/5608 cut-off events. [2024-06-20 15:16:01,158 INFO L125 PetriNetUnfolderBase]: For 772163/772163 co-relation queries the response was YES. [2024-06-20 15:16:01,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48737 conditions, 5608 events. 3313/5608 cut-off events. For 772163/772163 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38182 event pairs, 677 based on Foata normal form. 1/5601 useless extension candidates. Maximal degree in co-relation 48563. Up to 4757 conditions per place. [2024-06-20 15:16:01,240 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 165 changer transitions 0/528 dead transitions. [2024-06-20 15:16:01,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 528 transitions, 9398 flow [2024-06-20 15:16:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:16:01,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:16:01,241 INFO L175 Difference]: Start difference. First operand has 376 places, 502 transitions, 7604 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:16:01,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 528 transitions, 9398 flow [2024-06-20 15:16:03,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 528 transitions, 8875 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:03,622 INFO L231 Difference]: Finished difference. Result has 378 places, 508 transitions, 7523 flow [2024-06-20 15:16:03,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7115, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7523, PETRI_PLACES=378, PETRI_TRANSITIONS=508} [2024-06-20 15:16:03,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 15:16:03,632 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 508 transitions, 7523 flow [2024-06-20 15:16:03,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:03,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:03,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:16:03,632 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)] === [2024-06-20 15:16:03,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1255514983, now seen corresponding path program 6 times [2024-06-20 15:16:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:03,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449878954] [2024-06-20 15:16:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:03,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:03,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449878954] [2024-06-20 15:16:03,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449878954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:03,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:03,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705865793] [2024-06-20 15:16:03,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:03,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:03,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:03,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:03,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 508 transitions, 7523 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:03,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:03,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:04,807 INFO L124 PetriNetUnfolderBase]: 3310/5604 cut-off events. [2024-06-20 15:16:04,808 INFO L125 PetriNetUnfolderBase]: For 779519/779519 co-relation queries the response was YES. [2024-06-20 15:16:04,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48617 conditions, 5604 events. 3310/5604 cut-off events. For 779519/779519 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38210 event pairs, 677 based on Foata normal form. 1/5597 useless extension candidates. Maximal degree in co-relation 48443. Up to 4754 conditions per place. [2024-06-20 15:16:04,889 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 366 selfloop transitions, 157 changer transitions 0/531 dead transitions. [2024-06-20 15:16:04,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 531 transitions, 9231 flow [2024-06-20 15:16:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:16:04,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:16:04,891 INFO L175 Difference]: Start difference. First operand has 378 places, 508 transitions, 7523 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:16:04,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 531 transitions, 9231 flow [2024-06-20 15:16:07,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 531 transitions, 8968 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:07,306 INFO L231 Difference]: Finished difference. Result has 382 places, 508 transitions, 7580 flow [2024-06-20 15:16:07,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7580, PETRI_PLACES=382, PETRI_TRANSITIONS=508} [2024-06-20 15:16:07,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-20 15:16:07,306 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 508 transitions, 7580 flow [2024-06-20 15:16:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:07,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:07,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:07,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:16:07,307 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)] === [2024-06-20 15:16:07,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1909289285, now seen corresponding path program 4 times [2024-06-20 15:16:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:07,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562624353] [2024-06-20 15:16:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:07,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562624353] [2024-06-20 15:16:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562624353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:07,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:07,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925507091] [2024-06-20 15:16:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:07,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:07,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 508 transitions, 7580 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:07,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:07,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:07,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:08,486 INFO L124 PetriNetUnfolderBase]: 3331/5629 cut-off events. [2024-06-20 15:16:08,486 INFO L125 PetriNetUnfolderBase]: For 807024/807027 co-relation queries the response was YES. [2024-06-20 15:16:08,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49272 conditions, 5629 events. 3331/5629 cut-off events. For 807024/807027 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 38324 event pairs, 735 based on Foata normal form. 1/5609 useless extension candidates. Maximal degree in co-relation 49097. Up to 4403 conditions per place. [2024-06-20 15:16:08,574 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 271 changer transitions 0/549 dead transitions. [2024-06-20 15:16:08,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 549 transitions, 9806 flow [2024-06-20 15:16:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:16:08,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:16:08,576 INFO L175 Difference]: Start difference. First operand has 382 places, 508 transitions, 7580 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:16:08,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 549 transitions, 9806 flow [2024-06-20 15:16:11,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 549 transitions, 9234 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:11,347 INFO L231 Difference]: Finished difference. Result has 382 places, 521 transitions, 7824 flow [2024-06-20 15:16:11,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7008, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7824, PETRI_PLACES=382, PETRI_TRANSITIONS=521} [2024-06-20 15:16:11,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-20 15:16:11,348 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 521 transitions, 7824 flow [2024-06-20 15:16:11,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:11,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:11,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:11,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:16:11,348 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)] === [2024-06-20 15:16:11,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1727024159, now seen corresponding path program 7 times [2024-06-20 15:16:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:11,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247305757] [2024-06-20 15:16:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:11,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:11,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:11,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247305757] [2024-06-20 15:16:11,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247305757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:11,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:11,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:11,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195324169] [2024-06-20 15:16:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:11,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:11,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:11,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:11,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 521 transitions, 7824 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:11,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:11,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:11,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:12,541 INFO L124 PetriNetUnfolderBase]: 3336/5630 cut-off events. [2024-06-20 15:16:12,541 INFO L125 PetriNetUnfolderBase]: For 826261/826264 co-relation queries the response was YES. [2024-06-20 15:16:12,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49858 conditions, 5630 events. 3336/5630 cut-off events. For 826261/826264 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38259 event pairs, 697 based on Foata normal form. 1/5614 useless extension candidates. Maximal degree in co-relation 49684. Up to 4789 conditions per place. [2024-06-20 15:16:12,627 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 168 changer transitions 0/550 dead transitions. [2024-06-20 15:16:12,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 550 transitions, 9419 flow [2024-06-20 15:16:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:16:12,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:16:12,628 INFO L175 Difference]: Start difference. First operand has 382 places, 521 transitions, 7824 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:16:12,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 550 transitions, 9419 flow [2024-06-20 15:16:15,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 550 transitions, 9256 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-20 15:16:15,220 INFO L231 Difference]: Finished difference. Result has 388 places, 524 transitions, 8038 flow [2024-06-20 15:16:15,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8038, PETRI_PLACES=388, PETRI_TRANSITIONS=524} [2024-06-20 15:16:15,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-20 15:16:15,221 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 524 transitions, 8038 flow [2024-06-20 15:16:15,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:15,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:15,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:16:15,222 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)] === [2024-06-20 15:16:15,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -65138629, now seen corresponding path program 8 times [2024-06-20 15:16:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:15,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088846288] [2024-06-20 15:16:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:15,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:15,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088846288] [2024-06-20 15:16:15,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088846288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:15,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:15,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592040331] [2024-06-20 15:16:15,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:15,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:15,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:15,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 524 transitions, 8038 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:15,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:15,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:15,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:16,462 INFO L124 PetriNetUnfolderBase]: 3349/5654 cut-off events. [2024-06-20 15:16:16,463 INFO L125 PetriNetUnfolderBase]: For 845063/845066 co-relation queries the response was YES. [2024-06-20 15:16:16,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50193 conditions, 5654 events. 3349/5654 cut-off events. For 845063/845066 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38455 event pairs, 695 based on Foata normal form. 1/5640 useless extension candidates. Maximal degree in co-relation 50016. Up to 4804 conditions per place. [2024-06-20 15:16:16,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 174 changer transitions 0/556 dead transitions. [2024-06-20 15:16:16,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 556 transitions, 9902 flow [2024-06-20 15:16:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-20 15:16:16,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-20 15:16:16,551 INFO L175 Difference]: Start difference. First operand has 388 places, 524 transitions, 8038 flow. Second operand 10 states and 236 transitions. [2024-06-20 15:16:16,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 556 transitions, 9902 flow [2024-06-20 15:16:19,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 556 transitions, 9644 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:19,542 INFO L231 Difference]: Finished difference. Result has 393 places, 530 transitions, 8216 flow [2024-06-20 15:16:19,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8216, PETRI_PLACES=393, PETRI_TRANSITIONS=530} [2024-06-20 15:16:19,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-20 15:16:19,543 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 530 transitions, 8216 flow [2024-06-20 15:16:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:19,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:19,543 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] [2024-06-20 15:16:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:16:19,544 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)] === [2024-06-20 15:16:19,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1047779959, now seen corresponding path program 9 times [2024-06-20 15:16:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:19,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064949580] [2024-06-20 15:16:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:19,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064949580] [2024-06-20 15:16:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064949580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:19,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:19,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:19,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777179448] [2024-06-20 15:16:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:19,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:19,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:19,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:19,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:19,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:19,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 530 transitions, 8216 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:19,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:19,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:19,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:20,766 INFO L124 PetriNetUnfolderBase]: 3346/5650 cut-off events. [2024-06-20 15:16:20,766 INFO L125 PetriNetUnfolderBase]: For 856279/856282 co-relation queries the response was YES. [2024-06-20 15:16:20,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50259 conditions, 5650 events. 3346/5650 cut-off events. For 856279/856282 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38400 event pairs, 695 based on Foata normal form. 1/5636 useless extension candidates. Maximal degree in co-relation 50080. Up to 4801 conditions per place. [2024-06-20 15:16:20,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 372 selfloop transitions, 173 changer transitions 0/553 dead transitions. [2024-06-20 15:16:20,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 553 transitions, 9782 flow [2024-06-20 15:16:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:16:20,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:16:20,857 INFO L175 Difference]: Start difference. First operand has 393 places, 530 transitions, 8216 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:16:20,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 553 transitions, 9782 flow [2024-06-20 15:16:23,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 553 transitions, 9396 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:23,441 INFO L231 Difference]: Finished difference. Result has 394 places, 530 transitions, 8182 flow [2024-06-20 15:16:23,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7830, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8182, PETRI_PLACES=394, PETRI_TRANSITIONS=530} [2024-06-20 15:16:23,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 15:16:23,442 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 530 transitions, 8182 flow [2024-06-20 15:16:23,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:23,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:23,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:16:23,442 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)] === [2024-06-20 15:16:23,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1047987163, now seen corresponding path program 5 times [2024-06-20 15:16:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:23,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986958311] [2024-06-20 15:16:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:23,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986958311] [2024-06-20 15:16:23,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986958311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:23,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:23,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166809715] [2024-06-20 15:16:23,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:23,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:23,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:23,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:23,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:23,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:23,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 530 transitions, 8182 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:23,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:23,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:23,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:24,795 INFO L124 PetriNetUnfolderBase]: 3359/5664 cut-off events. [2024-06-20 15:16:24,795 INFO L125 PetriNetUnfolderBase]: For 877373/877376 co-relation queries the response was YES. [2024-06-20 15:16:24,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50622 conditions, 5664 events. 3359/5664 cut-off events. For 877373/877376 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38448 event pairs, 728 based on Foata normal form. 1/5642 useless extension candidates. Maximal degree in co-relation 50442. Up to 4425 conditions per place. [2024-06-20 15:16:24,871 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 277 changer transitions 0/561 dead transitions. [2024-06-20 15:16:24,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 561 transitions, 10296 flow [2024-06-20 15:16:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:16:24,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:16:24,872 INFO L175 Difference]: Start difference. First operand has 394 places, 530 transitions, 8182 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:16:24,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 561 transitions, 10296 flow [2024-06-20 15:16:27,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 561 transitions, 9950 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:27,358 INFO L231 Difference]: Finished difference. Result has 395 places, 536 transitions, 8496 flow [2024-06-20 15:16:27,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7836, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8496, PETRI_PLACES=395, PETRI_TRANSITIONS=536} [2024-06-20 15:16:27,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 15:16:27,359 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 536 transitions, 8496 flow [2024-06-20 15:16:27,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:27,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:27,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:16:27,359 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)] === [2024-06-20 15:16:27,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1047601213, now seen corresponding path program 6 times [2024-06-20 15:16:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342896147] [2024-06-20 15:16:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342896147] [2024-06-20 15:16:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342896147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:27,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:27,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404229563] [2024-06-20 15:16:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:27,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:27,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:27,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:27,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 536 transitions, 8496 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:27,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:27,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:27,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:28,548 INFO L124 PetriNetUnfolderBase]: 3356/5660 cut-off events. [2024-06-20 15:16:28,548 INFO L125 PetriNetUnfolderBase]: For 888979/888982 co-relation queries the response was YES. [2024-06-20 15:16:28,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50889 conditions, 5660 events. 3356/5660 cut-off events. For 888979/888982 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38463 event pairs, 728 based on Foata normal form. 1/5638 useless extension candidates. Maximal degree in co-relation 50708. Up to 4423 conditions per place. [2024-06-20 15:16:28,636 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 279 changer transitions 0/560 dead transitions. [2024-06-20 15:16:28,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 560 transitions, 10300 flow [2024-06-20 15:16:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:16:28,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:16:28,639 INFO L175 Difference]: Start difference. First operand has 395 places, 536 transitions, 8496 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:16:28,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 560 transitions, 10300 flow [2024-06-20 15:16:31,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 560 transitions, 9858 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:31,501 INFO L231 Difference]: Finished difference. Result has 400 places, 536 transitions, 8618 flow [2024-06-20 15:16:31,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8054, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8618, PETRI_PLACES=400, PETRI_TRANSITIONS=536} [2024-06-20 15:16:31,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-20 15:16:31,502 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 536 transitions, 8618 flow [2024-06-20 15:16:31,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:31,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:31,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:31,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:16:31,504 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)] === [2024-06-20 15:16:31,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1649506053, now seen corresponding path program 10 times [2024-06-20 15:16:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:31,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562913302] [2024-06-20 15:16:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:31,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:31,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562913302] [2024-06-20 15:16:31,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562913302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:31,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:31,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:31,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831943242] [2024-06-20 15:16:31,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:31,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:31,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:31,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:31,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:31,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:31,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 536 transitions, 8618 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:31,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:31,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:32,746 INFO L124 PetriNetUnfolderBase]: 3369/5707 cut-off events. [2024-06-20 15:16:32,746 INFO L125 PetriNetUnfolderBase]: For 909246/909249 co-relation queries the response was YES. [2024-06-20 15:16:32,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51310 conditions, 5707 events. 3369/5707 cut-off events. For 909246/909249 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 39022 event pairs, 699 based on Foata normal form. 1/5698 useless extension candidates. Maximal degree in co-relation 51128. Up to 4830 conditions per place. [2024-06-20 15:16:32,832 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 179 changer transitions 0/565 dead transitions. [2024-06-20 15:16:32,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 565 transitions, 10734 flow [2024-06-20 15:16:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 15:16:32,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-20 15:16:32,834 INFO L175 Difference]: Start difference. First operand has 400 places, 536 transitions, 8618 flow. Second operand 9 states and 217 transitions. [2024-06-20 15:16:32,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 565 transitions, 10734 flow [2024-06-20 15:16:35,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 565 transitions, 10160 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:35,662 INFO L231 Difference]: Finished difference. Result has 402 places, 542 transitions, 8492 flow [2024-06-20 15:16:35,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8052, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8492, PETRI_PLACES=402, PETRI_TRANSITIONS=542} [2024-06-20 15:16:35,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-20 15:16:35,663 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 542 transitions, 8492 flow [2024-06-20 15:16:35,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:35,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:35,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:35,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:16:35,664 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)] === [2024-06-20 15:16:35,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -999847077, now seen corresponding path program 7 times [2024-06-20 15:16:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:35,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429690129] [2024-06-20 15:16:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:35,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:35,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:35,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429690129] [2024-06-20 15:16:35,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429690129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:35,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:35,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:35,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655476573] [2024-06-20 15:16:35,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:35,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:35,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:35,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:35,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 542 transitions, 8492 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:35,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:35,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:35,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:36,890 INFO L124 PetriNetUnfolderBase]: 3414/5741 cut-off events. [2024-06-20 15:16:36,891 INFO L125 PetriNetUnfolderBase]: For 959124/959127 co-relation queries the response was YES. [2024-06-20 15:16:36,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52275 conditions, 5741 events. 3414/5741 cut-off events. For 959124/959127 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 38981 event pairs, 720 based on Foata normal form. 1/5718 useless extension candidates. Maximal degree in co-relation 52092. Up to 4470 conditions per place. [2024-06-20 15:16:36,982 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 302 changer transitions 0/580 dead transitions. [2024-06-20 15:16:36,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 580 transitions, 10870 flow [2024-06-20 15:16:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:16:36,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:16:36,983 INFO L175 Difference]: Start difference. First operand has 402 places, 542 transitions, 8492 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:16:36,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 580 transitions, 10870 flow [2024-06-20 15:16:40,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 580 transitions, 10496 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:40,232 INFO L231 Difference]: Finished difference. Result has 405 places, 558 transitions, 9038 flow [2024-06-20 15:16:40,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8118, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9038, PETRI_PLACES=405, PETRI_TRANSITIONS=558} [2024-06-20 15:16:40,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-20 15:16:40,233 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 558 transitions, 9038 flow [2024-06-20 15:16:40,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:40,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:40,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:16:40,233 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)] === [2024-06-20 15:16:40,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1760019429, now seen corresponding path program 8 times [2024-06-20 15:16:40,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:40,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201589636] [2024-06-20 15:16:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:40,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:40,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201589636] [2024-06-20 15:16:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201589636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:40,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:40,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141804145] [2024-06-20 15:16:40,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:40,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:40,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:40,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:40,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 558 transitions, 9038 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:40,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:40,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:41,538 INFO L124 PetriNetUnfolderBase]: 3424/5792 cut-off events. [2024-06-20 15:16:41,538 INFO L125 PetriNetUnfolderBase]: For 974627/974627 co-relation queries the response was YES. [2024-06-20 15:16:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52723 conditions, 5792 events. 3424/5792 cut-off events. For 974627/974627 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39644 event pairs, 649 based on Foata normal form. 1/5791 useless extension candidates. Maximal degree in co-relation 52539. Up to 5188 conditions per place. [2024-06-20 15:16:41,631 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 525 selfloop transitions, 49 changer transitions 0/582 dead transitions. [2024-06-20 15:16:41,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 582 transitions, 10338 flow [2024-06-20 15:16:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:16:41,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-20 15:16:41,633 INFO L175 Difference]: Start difference. First operand has 405 places, 558 transitions, 9038 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:16:41,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 582 transitions, 10338 flow [2024-06-20 15:16:45,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 582 transitions, 9784 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:45,201 INFO L231 Difference]: Finished difference. Result has 410 places, 564 transitions, 8702 flow [2024-06-20 15:16:45,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8505, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8702, PETRI_PLACES=410, PETRI_TRANSITIONS=564} [2024-06-20 15:16:45,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-20 15:16:45,201 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 564 transitions, 8702 flow [2024-06-20 15:16:45,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:45,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:45,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:16:45,202 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)] === [2024-06-20 15:16:45,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1753554999, now seen corresponding path program 9 times [2024-06-20 15:16:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:45,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367458177] [2024-06-20 15:16:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:45,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:45,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367458177] [2024-06-20 15:16:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367458177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:45,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:45,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945101362] [2024-06-20 15:16:45,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:45,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:45,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:45,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:45,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:45,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 564 transitions, 8702 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:45,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:45,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:46,597 INFO L124 PetriNetUnfolderBase]: 3429/5766 cut-off events. [2024-06-20 15:16:46,597 INFO L125 PetriNetUnfolderBase]: For 992040/992043 co-relation queries the response was YES. [2024-06-20 15:16:46,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52102 conditions, 5766 events. 3429/5766 cut-off events. For 992040/992043 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39227 event pairs, 720 based on Foata normal form. 1/5743 useless extension candidates. Maximal degree in co-relation 51917. Up to 4482 conditions per place. [2024-06-20 15:16:46,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 303 changer transitions 0/590 dead transitions. [2024-06-20 15:16:46,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 590 transitions, 11072 flow [2024-06-20 15:16:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:16:46,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:16:46,683 INFO L175 Difference]: Start difference. First operand has 410 places, 564 transitions, 8702 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:16:46,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 590 transitions, 11072 flow [2024-06-20 15:16:50,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 590 transitions, 10956 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:50,379 INFO L231 Difference]: Finished difference. Result has 413 places, 567 transitions, 9240 flow [2024-06-20 15:16:50,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9240, PETRI_PLACES=413, PETRI_TRANSITIONS=567} [2024-06-20 15:16:50,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-20 15:16:50,380 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 567 transitions, 9240 flow [2024-06-20 15:16:50,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:50,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:50,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:50,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:16:50,380 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)] === [2024-06-20 15:16:50,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1524306563, now seen corresponding path program 10 times [2024-06-20 15:16:50,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:50,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568281907] [2024-06-20 15:16:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:50,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:50,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:50,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568281907] [2024-06-20 15:16:50,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568281907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:50,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:50,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:50,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837006592] [2024-06-20 15:16:50,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:50,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:50,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:50,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:50,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:50,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 567 transitions, 9240 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:50,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:50,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:50,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:51,744 INFO L124 PetriNetUnfolderBase]: 3426/5809 cut-off events. [2024-06-20 15:16:51,744 INFO L125 PetriNetUnfolderBase]: For 1002444/1002444 co-relation queries the response was YES. [2024-06-20 15:16:51,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52838 conditions, 5809 events. 3426/5809 cut-off events. For 1002444/1002444 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39834 event pairs, 659 based on Foata normal form. 1/5808 useless extension candidates. Maximal degree in co-relation 52652. Up to 5181 conditions per place. [2024-06-20 15:16:51,842 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 523 selfloop transitions, 57 changer transitions 0/588 dead transitions. [2024-06-20 15:16:51,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 588 transitions, 10674 flow [2024-06-20 15:16:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 15:16:51,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-20 15:16:51,843 INFO L175 Difference]: Start difference. First operand has 413 places, 567 transitions, 9240 flow. Second operand 10 states and 227 transitions. [2024-06-20 15:16:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 588 transitions, 10674 flow [2024-06-20 15:16:55,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 588 transitions, 10129 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:55,861 INFO L231 Difference]: Finished difference. Result has 420 places, 567 transitions, 8815 flow [2024-06-20 15:16:55,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8695, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8815, PETRI_PLACES=420, PETRI_TRANSITIONS=567} [2024-06-20 15:16:55,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-20 15:16:55,862 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 567 transitions, 8815 flow [2024-06-20 15:16:55,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:55,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:55,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:55,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:16:55,863 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)] === [2024-06-20 15:16:55,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1672064963, now seen corresponding path program 11 times [2024-06-20 15:16:55,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:55,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428106172] [2024-06-20 15:16:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428106172] [2024-06-20 15:16:55,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428106172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:55,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:55,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:55,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635312404] [2024-06-20 15:16:55,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:55,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:56,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:16:56,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 567 transitions, 8815 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:56,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:56,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:16:56,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:57,134 INFO L124 PetriNetUnfolderBase]: 3423/5758 cut-off events. [2024-06-20 15:16:57,135 INFO L125 PetriNetUnfolderBase]: For 1013435/1013438 co-relation queries the response was YES. [2024-06-20 15:16:57,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 5758 events. 3423/5758 cut-off events. For 1013435/1013438 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39251 event pairs, 720 based on Foata normal form. 1/5735 useless extension candidates. Maximal degree in co-relation 51942. Up to 4478 conditions per place. [2024-06-20 15:16:57,238 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 304 changer transitions 0/589 dead transitions. [2024-06-20 15:16:57,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 589 transitions, 10933 flow [2024-06-20 15:16:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:16:57,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:16:57,239 INFO L175 Difference]: Start difference. First operand has 420 places, 567 transitions, 8815 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:16:57,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 589 transitions, 10933 flow [2024-06-20 15:17:01,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 589 transitions, 10763 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:17:01,050 INFO L231 Difference]: Finished difference. Result has 421 places, 567 transitions, 9259 flow [2024-06-20 15:17:01,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8645, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9259, PETRI_PLACES=421, PETRI_TRANSITIONS=567} [2024-06-20 15:17:01,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-20 15:17:01,051 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 567 transitions, 9259 flow [2024-06-20 15:17:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:01,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:01,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:01,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:17:01,051 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)] === [2024-06-20 15:17:01,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1935763397, now seen corresponding path program 11 times [2024-06-20 15:17:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:01,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859356703] [2024-06-20 15:17:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:01,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859356703] [2024-06-20 15:17:01,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859356703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:01,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:01,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:01,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550998849] [2024-06-20 15:17:01,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:01,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:01,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:01,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:01,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 567 transitions, 9259 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:01,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:01,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:01,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:02,436 INFO L124 PetriNetUnfolderBase]: 3420/5777 cut-off events. [2024-06-20 15:17:02,436 INFO L125 PetriNetUnfolderBase]: For 1025602/1025602 co-relation queries the response was YES. [2024-06-20 15:17:02,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 5777 events. 3420/5777 cut-off events. For 1025602/1025602 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39498 event pairs, 638 based on Foata normal form. 1/5776 useless extension candidates. Maximal degree in co-relation 52608. Up to 5209 conditions per place. [2024-06-20 15:17:02,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 546 selfloop transitions, 31 changer transitions 0/585 dead transitions. [2024-06-20 15:17:02,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 585 transitions, 10457 flow [2024-06-20 15:17:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:17:02,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-20 15:17:02,523 INFO L175 Difference]: Start difference. First operand has 421 places, 567 transitions, 9259 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:17:02,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 585 transitions, 10457 flow [2024-06-20 15:17:06,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 585 transitions, 9954 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:06,132 INFO L231 Difference]: Finished difference. Result has 423 places, 567 transitions, 8824 flow [2024-06-20 15:17:06,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8756, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8824, PETRI_PLACES=423, PETRI_TRANSITIONS=567} [2024-06-20 15:17:06,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-20 15:17:06,133 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 567 transitions, 8824 flow [2024-06-20 15:17:06,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:06,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:06,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:06,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:17:06,134 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)] === [2024-06-20 15:17:06,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:06,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1524069413, now seen corresponding path program 12 times [2024-06-20 15:17:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:06,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391552009] [2024-06-20 15:17:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:06,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:06,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391552009] [2024-06-20 15:17:06,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391552009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:06,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:06,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614309408] [2024-06-20 15:17:06,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:06,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:06,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:06,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:06,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 567 transitions, 8824 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:06,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:06,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:06,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:07,411 INFO L124 PetriNetUnfolderBase]: 3417/5773 cut-off events. [2024-06-20 15:17:07,411 INFO L125 PetriNetUnfolderBase]: For 1033631/1033631 co-relation queries the response was YES. [2024-06-20 15:17:07,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 5773 events. 3417/5773 cut-off events. For 1033631/1033631 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39363 event pairs, 639 based on Foata normal form. 1/5772 useless extension candidates. Maximal degree in co-relation 51940. Up to 5170 conditions per place. [2024-06-20 15:17:07,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 56 changer transitions 0/585 dead transitions. [2024-06-20 15:17:07,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 585 transitions, 10022 flow [2024-06-20 15:17:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:17:07,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:17:07,504 INFO L175 Difference]: Start difference. First operand has 423 places, 567 transitions, 8824 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:17:07,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 585 transitions, 10022 flow [2024-06-20 15:17:11,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 585 transitions, 9934 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 15:17:11,586 INFO L231 Difference]: Finished difference. Result has 427 places, 567 transitions, 8854 flow [2024-06-20 15:17:11,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8854, PETRI_PLACES=427, PETRI_TRANSITIONS=567} [2024-06-20 15:17:11,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 15:17:11,587 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 567 transitions, 8854 flow [2024-06-20 15:17:11,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:11,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:11,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:11,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:17:11,588 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)] === [2024-06-20 15:17:11,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1671678827, now seen corresponding path program 12 times [2024-06-20 15:17:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:11,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335055369] [2024-06-20 15:17:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:11,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:11,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335055369] [2024-06-20 15:17:11,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335055369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:11,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:11,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:11,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948205856] [2024-06-20 15:17:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:11,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:11,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 567 transitions, 8854 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:11,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:11,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:11,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:12,891 INFO L124 PetriNetUnfolderBase]: 3414/5760 cut-off events. [2024-06-20 15:17:12,892 INFO L125 PetriNetUnfolderBase]: For 1045311/1045314 co-relation queries the response was YES. [2024-06-20 15:17:12,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52157 conditions, 5760 events. 3414/5760 cut-off events. For 1045311/1045314 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39267 event pairs, 679 based on Foata normal form. 1/5751 useless extension candidates. Maximal degree in co-relation 51967. Up to 4895 conditions per place. [2024-06-20 15:17:12,982 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 180 changer transitions 0/591 dead transitions. [2024-06-20 15:17:12,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 591 transitions, 10772 flow [2024-06-20 15:17:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-20 15:17:12,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-20 15:17:12,983 INFO L175 Difference]: Start difference. First operand has 427 places, 567 transitions, 8854 flow. Second operand 11 states and 254 transitions. [2024-06-20 15:17:12,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 591 transitions, 10772 flow [2024-06-20 15:17:16,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 591 transitions, 10654 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:17:17,003 INFO L231 Difference]: Finished difference. Result has 431 places, 567 transitions, 9102 flow [2024-06-20 15:17:17,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9102, PETRI_PLACES=431, PETRI_TRANSITIONS=567} [2024-06-20 15:17:17,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-20 15:17:17,004 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 567 transitions, 9102 flow [2024-06-20 15:17:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:17,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:17,004 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] [2024-06-20 15:17:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:17:17,005 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)] === [2024-06-20 15:17:17,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:17,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1523977157, now seen corresponding path program 3 times [2024-06-20 15:17:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213337614] [2024-06-20 15:17:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213337614] [2024-06-20 15:17:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213337614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:17,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471861399] [2024-06-20 15:17:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:17,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:17,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 567 transitions, 9102 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:17,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:17,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:17,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:18,417 INFO L124 PetriNetUnfolderBase]: 3434/5817 cut-off events. [2024-06-20 15:17:18,417 INFO L125 PetriNetUnfolderBase]: For 1095060/1095060 co-relation queries the response was YES. [2024-06-20 15:17:18,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52932 conditions, 5817 events. 3434/5817 cut-off events. For 1095060/1095060 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39906 event pairs, 649 based on Foata normal form. 6/5821 useless extension candidates. Maximal degree in co-relation 52741. Up to 5144 conditions per place. [2024-06-20 15:17:18,503 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 537 selfloop transitions, 48 changer transitions 0/593 dead transitions. [2024-06-20 15:17:18,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 593 transitions, 10400 flow [2024-06-20 15:17:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:17:18,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:17:18,505 INFO L175 Difference]: Start difference. First operand has 431 places, 567 transitions, 9102 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:17:18,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 593 transitions, 10400 flow [2024-06-20 15:17:22,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 593 transitions, 10085 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 15:17:22,982 INFO L231 Difference]: Finished difference. Result has 430 places, 568 transitions, 8915 flow [2024-06-20 15:17:22,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8787, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8915, PETRI_PLACES=430, PETRI_TRANSITIONS=568} [2024-06-20 15:17:22,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-20 15:17:22,983 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 568 transitions, 8915 flow [2024-06-20 15:17:22,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:22,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:22,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:22,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:17:22,984 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)] === [2024-06-20 15:17:22,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1047772023, now seen corresponding path program 1 times [2024-06-20 15:17:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:22,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799299659] [2024-06-20 15:17:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:22,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799299659] [2024-06-20 15:17:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799299659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:23,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:23,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:23,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893351815] [2024-06-20 15:17:23,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:23,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:23,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:23,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 568 transitions, 8915 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:23,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:23,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:23,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:24,318 INFO L124 PetriNetUnfolderBase]: 3442/5812 cut-off events. [2024-06-20 15:17:24,318 INFO L125 PetriNetUnfolderBase]: For 1088400/1088403 co-relation queries the response was YES. [2024-06-20 15:17:24,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52827 conditions, 5812 events. 3442/5812 cut-off events. For 1088400/1088403 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39754 event pairs, 666 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 52635. Up to 5145 conditions per place. [2024-06-20 15:17:24,412 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 511 selfloop transitions, 73 changer transitions 0/592 dead transitions. [2024-06-20 15:17:24,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 592 transitions, 10163 flow [2024-06-20 15:17:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:17:24,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 15:17:24,413 INFO L175 Difference]: Start difference. First operand has 430 places, 568 transitions, 8915 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:17:24,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 592 transitions, 10163 flow [2024-06-20 15:17:29,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 592 transitions, 10065 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:29,092 INFO L231 Difference]: Finished difference. Result has 433 places, 570 transitions, 8998 flow [2024-06-20 15:17:29,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8817, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8998, PETRI_PLACES=433, PETRI_TRANSITIONS=570} [2024-06-20 15:17:29,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-20 15:17:29,093 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 570 transitions, 8998 flow [2024-06-20 15:17:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:29,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:29,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:29,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:17:29,094 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)] === [2024-06-20 15:17:29,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash -965711339, now seen corresponding path program 1 times [2024-06-20 15:17:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:29,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321724135] [2024-06-20 15:17:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:29,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321724135] [2024-06-20 15:17:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321724135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:29,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:29,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:29,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729416028] [2024-06-20 15:17:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:29,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:29,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:29,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:29,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 570 transitions, 8998 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:29,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:29,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:29,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:30,454 INFO L124 PetriNetUnfolderBase]: 3450/5817 cut-off events. [2024-06-20 15:17:30,454 INFO L125 PetriNetUnfolderBase]: For 1107027/1107030 co-relation queries the response was YES. [2024-06-20 15:17:30,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53068 conditions, 5817 events. 3450/5817 cut-off events. For 1107027/1107030 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39766 event pairs, 690 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 52876. Up to 4999 conditions per place. [2024-06-20 15:17:30,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 182 changer transitions 0/594 dead transitions. [2024-06-20 15:17:30,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 594 transitions, 10276 flow [2024-06-20 15:17:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:17:30,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:17:30,552 INFO L175 Difference]: Start difference. First operand has 433 places, 570 transitions, 8998 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:17:30,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 594 transitions, 10276 flow [2024-06-20 15:17:34,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 594 transitions, 10117 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:34,928 INFO L231 Difference]: Finished difference. Result has 435 places, 572 transitions, 9264 flow [2024-06-20 15:17:34,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8839, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9264, PETRI_PLACES=435, PETRI_TRANSITIONS=572} [2024-06-20 15:17:34,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-20 15:17:34,928 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 572 transitions, 9264 flow [2024-06-20 15:17:34,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:34,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:34,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:34,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:17:34,929 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)] === [2024-06-20 15:17:34,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1649498117, now seen corresponding path program 2 times [2024-06-20 15:17:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:34,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598385014] [2024-06-20 15:17:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:34,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:35,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:35,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598385014] [2024-06-20 15:17:35,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598385014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:35,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243341714] [2024-06-20 15:17:35,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:35,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:35,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:35,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 572 transitions, 9264 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:35,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:35,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:35,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:36,300 INFO L124 PetriNetUnfolderBase]: 3458/5850 cut-off events. [2024-06-20 15:17:36,301 INFO L125 PetriNetUnfolderBase]: For 1123158/1123161 co-relation queries the response was YES. [2024-06-20 15:17:36,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53627 conditions, 5850 events. 3458/5850 cut-off events. For 1123158/1123161 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40118 event pairs, 672 based on Foata normal form. 2/5846 useless extension candidates. Maximal degree in co-relation 53434. Up to 5169 conditions per place. [2024-06-20 15:17:36,391 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 513 selfloop transitions, 73 changer transitions 0/594 dead transitions. [2024-06-20 15:17:36,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 594 transitions, 10514 flow [2024-06-20 15:17:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-20 15:17:36,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:17:36,393 INFO L175 Difference]: Start difference. First operand has 435 places, 572 transitions, 9264 flow. Second operand 9 states and 207 transitions. [2024-06-20 15:17:36,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 594 transitions, 10514 flow [2024-06-20 15:17:40,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 594 transitions, 10105 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:40,736 INFO L231 Difference]: Finished difference. Result has 438 places, 574 transitions, 9040 flow [2024-06-20 15:17:40,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8855, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9040, PETRI_PLACES=438, PETRI_TRANSITIONS=574} [2024-06-20 15:17:40,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-20 15:17:40,737 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 574 transitions, 9040 flow [2024-06-20 15:17:40,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:40,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:40,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:40,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:17:40,737 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)] === [2024-06-20 15:17:40,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1753954837, now seen corresponding path program 2 times [2024-06-20 15:17:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:40,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814273338] [2024-06-20 15:17:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:40,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814273338] [2024-06-20 15:17:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814273338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:40,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:40,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163188322] [2024-06-20 15:17:40,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:40,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:40,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:40,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 574 transitions, 9040 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:40,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:40,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:40,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:42,101 INFO L124 PetriNetUnfolderBase]: 3466/5855 cut-off events. [2024-06-20 15:17:42,101 INFO L125 PetriNetUnfolderBase]: For 1141030/1141033 co-relation queries the response was YES. [2024-06-20 15:17:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53561 conditions, 5855 events. 3466/5855 cut-off events. For 1141030/1141033 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40119 event pairs, 702 based on Foata normal form. 2/5844 useless extension candidates. Maximal degree in co-relation 53367. Up to 5023 conditions per place. [2024-06-20 15:17:42,197 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 180 changer transitions 0/595 dead transitions. [2024-06-20 15:17:42,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 595 transitions, 10316 flow [2024-06-20 15:17:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:17:42,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:17:42,198 INFO L175 Difference]: Start difference. First operand has 438 places, 574 transitions, 9040 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:17:42,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 595 transitions, 10316 flow [2024-06-20 15:17:46,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 595 transitions, 10153 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:17:46,864 INFO L231 Difference]: Finished difference. Result has 439 places, 576 transitions, 9302 flow [2024-06-20 15:17:46,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8877, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9302, PETRI_PLACES=439, PETRI_TRANSITIONS=576} [2024-06-20 15:17:46,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-20 15:17:46,864 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 576 transitions, 9302 flow [2024-06-20 15:17:46,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:46,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:46,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:46,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:17:46,865 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)] === [2024-06-20 15:17:46,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1981855987, now seen corresponding path program 3 times [2024-06-20 15:17:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:46,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962665993] [2024-06-20 15:17:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:46,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962665993] [2024-06-20 15:17:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962665993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:46,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:46,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478272042] [2024-06-20 15:17:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:47,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:47,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 576 transitions, 9302 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:47,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:47,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:47,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:48,181 INFO L124 PetriNetUnfolderBase]: 3474/5879 cut-off events. [2024-06-20 15:17:48,182 INFO L125 PetriNetUnfolderBase]: For 1158769/1158772 co-relation queries the response was YES. [2024-06-20 15:17:48,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54159 conditions, 5879 events. 3474/5879 cut-off events. For 1158769/1158772 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40341 event pairs, 714 based on Foata normal form. 2/5868 useless extension candidates. Maximal degree in co-relation 53964. Up to 5035 conditions per place. [2024-06-20 15:17:48,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 182 changer transitions 0/597 dead transitions. [2024-06-20 15:17:48,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 597 transitions, 10586 flow [2024-06-20 15:17:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:17:48,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:17:48,282 INFO L175 Difference]: Start difference. First operand has 439 places, 576 transitions, 9302 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:17:48,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 597 transitions, 10586 flow [2024-06-20 15:17:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 597 transitions, 10177 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:52,628 INFO L231 Difference]: Finished difference. Result has 441 places, 578 transitions, 9326 flow [2024-06-20 15:17:52,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8893, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9326, PETRI_PLACES=441, PETRI_TRANSITIONS=578} [2024-06-20 15:17:52,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-20 15:17:52,629 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 578 transitions, 9326 flow [2024-06-20 15:17:52,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:52,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:52,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:52,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:17:52,630 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)] === [2024-06-20 15:17:52,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:52,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1990426867, now seen corresponding path program 4 times [2024-06-20 15:17:52,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:52,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989117836] [2024-06-20 15:17:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:52,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:52,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:52,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989117836] [2024-06-20 15:17:52,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989117836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:52,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:52,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:52,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839773267] [2024-06-20 15:17:52,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:52,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:52,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:52,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:52,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:52,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 578 transitions, 9326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:52,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:52,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:52,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:53,982 INFO L124 PetriNetUnfolderBase]: 3541/5968 cut-off events. [2024-06-20 15:17:53,982 INFO L125 PetriNetUnfolderBase]: For 1260073/1260076 co-relation queries the response was YES. [2024-06-20 15:17:54,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56413 conditions, 5968 events. 3541/5968 cut-off events. For 1260073/1260076 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40930 event pairs, 713 based on Foata normal form. 2/5957 useless extension candidates. Maximal degree in co-relation 56217. Up to 5051 conditions per place. [2024-06-20 15:17:54,078 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 190 changer transitions 0/607 dead transitions. [2024-06-20 15:17:54,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 607 transitions, 10996 flow [2024-06-20 15:17:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:17:54,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:17:54,080 INFO L175 Difference]: Start difference. First operand has 441 places, 578 transitions, 9326 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:17:54,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 607 transitions, 10996 flow [2024-06-20 15:17:58,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 607 transitions, 10579 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:58,895 INFO L231 Difference]: Finished difference. Result has 444 places, 583 transitions, 9457 flow [2024-06-20 15:17:58,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8909, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9457, PETRI_PLACES=444, PETRI_TRANSITIONS=583} [2024-06-20 15:17:58,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-20 15:17:58,896 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 583 transitions, 9457 flow [2024-06-20 15:17:58,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:58,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:58,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:58,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:17:58,897 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)] === [2024-06-20 15:17:58,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:58,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1214016775, now seen corresponding path program 13 times [2024-06-20 15:17:58,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:58,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749385779] [2024-06-20 15:17:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:59,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749385779] [2024-06-20 15:17:59,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749385779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:59,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:59,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678839196] [2024-06-20 15:17:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:59,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:59,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:17:59,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 583 transitions, 9457 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:59,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:59,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:17:59,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:00,381 INFO L124 PetriNetUnfolderBase]: 3538/5976 cut-off events. [2024-06-20 15:18:00,382 INFO L125 PetriNetUnfolderBase]: For 1263060/1263060 co-relation queries the response was YES. [2024-06-20 15:18:00,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56554 conditions, 5976 events. 3538/5976 cut-off events. For 1263060/1263060 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 41092 event pairs, 696 based on Foata normal form. 1/5969 useless extension candidates. Maximal degree in co-relation 56356. Up to 5085 conditions per place. [2024-06-20 15:18:00,469 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 180 changer transitions 0/602 dead transitions. [2024-06-20 15:18:00,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 602 transitions, 10939 flow [2024-06-20 15:18:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:18:00,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:18:00,470 INFO L175 Difference]: Start difference. First operand has 444 places, 583 transitions, 9457 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:18:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 602 transitions, 10939 flow [2024-06-20 15:18:05,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 602 transitions, 10634 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 15:18:05,726 INFO L231 Difference]: Finished difference. Result has 448 places, 583 transitions, 9518 flow [2024-06-20 15:18:05,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9152, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9518, PETRI_PLACES=448, PETRI_TRANSITIONS=583} [2024-06-20 15:18:05,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 15:18:05,726 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 583 transitions, 9518 flow [2024-06-20 15:18:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:05,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:05,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:05,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:18:05,727 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)] === [2024-06-20 15:18:05,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1771724815, now seen corresponding path program 13 times [2024-06-20 15:18:05,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:05,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875024171] [2024-06-20 15:18:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875024171] [2024-06-20 15:18:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875024171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:05,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:05,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:05,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96695974] [2024-06-20 15:18:05,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:05,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:05,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:05,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:05,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 583 transitions, 9518 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:05,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:05,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:05,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:07,090 INFO L124 PetriNetUnfolderBase]: 3548/5982 cut-off events. [2024-06-20 15:18:07,091 INFO L125 PetriNetUnfolderBase]: For 1288455/1288455 co-relation queries the response was YES. [2024-06-20 15:18:07,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56937 conditions, 5982 events. 3548/5982 cut-off events. For 1288455/1288455 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 41086 event pairs, 693 based on Foata normal form. 2/5976 useless extension candidates. Maximal degree in co-relation 56737. Up to 4673 conditions per place. [2024-06-20 15:18:07,189 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 285 changer transitions 0/610 dead transitions. [2024-06-20 15:18:07,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 610 transitions, 11346 flow [2024-06-20 15:18:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:18:07,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:18:07,190 INFO L175 Difference]: Start difference. First operand has 448 places, 583 transitions, 9518 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:18:07,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 610 transitions, 11346 flow [2024-06-20 15:18:12,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 610 transitions, 10990 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:12,457 INFO L231 Difference]: Finished difference. Result has 450 places, 587 transitions, 9807 flow [2024-06-20 15:18:12,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9162, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9807, PETRI_PLACES=450, PETRI_TRANSITIONS=587} [2024-06-20 15:18:12,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-20 15:18:12,457 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 587 transitions, 9807 flow [2024-06-20 15:18:12,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:12,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:12,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:18:12,458 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)] === [2024-06-20 15:18:12,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 826195791, now seen corresponding path program 14 times [2024-06-20 15:18:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:12,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762650664] [2024-06-20 15:18:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:12,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:12,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762650664] [2024-06-20 15:18:12,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762650664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:12,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:12,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:12,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643315370] [2024-06-20 15:18:12,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:12,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:12,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:12,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 587 transitions, 9807 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:12,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:12,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:12,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:13,835 INFO L124 PetriNetUnfolderBase]: 3553/5979 cut-off events. [2024-06-20 15:18:13,835 INFO L125 PetriNetUnfolderBase]: For 1305037/1305037 co-relation queries the response was YES. [2024-06-20 15:18:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57268 conditions, 5979 events. 3553/5979 cut-off events. For 1305037/1305037 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 40966 event pairs, 676 based on Foata normal form. 1/5972 useless extension candidates. Maximal degree in co-relation 57068. Up to 5105 conditions per place. [2024-06-20 15:18:13,935 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 170 changer transitions 0/612 dead transitions. [2024-06-20 15:18:13,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 612 transitions, 11356 flow [2024-06-20 15:18:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:18:13,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-20 15:18:13,936 INFO L175 Difference]: Start difference. First operand has 450 places, 587 transitions, 9807 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:18:13,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 612 transitions, 11356 flow [2024-06-20 15:18:19,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 612 transitions, 10602 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:19,010 INFO L231 Difference]: Finished difference. Result has 451 places, 590 transitions, 9434 flow [2024-06-20 15:18:19,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9055, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9434, PETRI_PLACES=451, PETRI_TRANSITIONS=590} [2024-06-20 15:18:19,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 15:18:19,010 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 590 transitions, 9434 flow [2024-06-20 15:18:19,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:19,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:19,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:19,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:18:19,011 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)] === [2024-06-20 15:18:19,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1150937097, now seen corresponding path program 14 times [2024-06-20 15:18:19,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:19,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650891207] [2024-06-20 15:18:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:19,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:19,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650891207] [2024-06-20 15:18:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650891207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:19,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:19,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:19,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68164597] [2024-06-20 15:18:19,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:19,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:19,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:19,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:19,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:19,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:19,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 590 transitions, 9434 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:19,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:19,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:19,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:20,353 INFO L124 PetriNetUnfolderBase]: 3563/6009 cut-off events. [2024-06-20 15:18:20,353 INFO L125 PetriNetUnfolderBase]: For 1327257/1327257 co-relation queries the response was YES. [2024-06-20 15:18:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56882 conditions, 6009 events. 3563/6009 cut-off events. For 1327257/1327257 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41319 event pairs, 693 based on Foata normal form. 2/6003 useless extension candidates. Maximal degree in co-relation 56682. Up to 4687 conditions per place. [2024-06-20 15:18:20,451 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 328 selfloop transitions, 279 changer transitions 0/615 dead transitions. [2024-06-20 15:18:20,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 615 transitions, 11509 flow [2024-06-20 15:18:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:18:20,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:18:20,452 INFO L175 Difference]: Start difference. First operand has 451 places, 590 transitions, 9434 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:18:20,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 615 transitions, 11509 flow [2024-06-20 15:18:26,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 615 transitions, 11278 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:26,211 INFO L231 Difference]: Finished difference. Result has 453 places, 594 transitions, 9817 flow [2024-06-20 15:18:26,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9203, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9817, PETRI_PLACES=453, PETRI_TRANSITIONS=594} [2024-06-20 15:18:26,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-20 15:18:26,212 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 594 transitions, 9817 flow [2024-06-20 15:18:26,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:26,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:26,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:26,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:18:26,213 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)] === [2024-06-20 15:18:26,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash 871984521, now seen corresponding path program 15 times [2024-06-20 15:18:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:26,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410219195] [2024-06-20 15:18:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:26,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410219195] [2024-06-20 15:18:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410219195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:26,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:26,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781121896] [2024-06-20 15:18:26,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:26,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:26,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:26,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:26,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 594 transitions, 9817 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:26,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:27,697 INFO L124 PetriNetUnfolderBase]: 3560/6017 cut-off events. [2024-06-20 15:18:27,697 INFO L125 PetriNetUnfolderBase]: For 1333165/1333165 co-relation queries the response was YES. [2024-06-20 15:18:27,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57230 conditions, 6017 events. 3560/6017 cut-off events. For 1333165/1333165 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41486 event pairs, 696 based on Foata normal form. 1/6010 useless extension candidates. Maximal degree in co-relation 57029. Up to 5116 conditions per place. [2024-06-20 15:18:27,787 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 167 changer transitions 0/614 dead transitions. [2024-06-20 15:18:27,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 614 transitions, 11589 flow [2024-06-20 15:18:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:18:27,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:18:27,788 INFO L175 Difference]: Start difference. First operand has 453 places, 594 transitions, 9817 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:18:27,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 614 transitions, 11589 flow [2024-06-20 15:18:32,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 614 transitions, 11016 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:32,669 INFO L231 Difference]: Finished difference. Result has 455 places, 594 transitions, 9584 flow [2024-06-20 15:18:32,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9244, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9584, PETRI_PLACES=455, PETRI_TRANSITIONS=594} [2024-06-20 15:18:32,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 15:18:32,670 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 594 transitions, 9584 flow [2024-06-20 15:18:32,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:32,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:32,670 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] [2024-06-20 15:18:32,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:18:32,670 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)] === [2024-06-20 15:18:32,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash 872163267, now seen corresponding path program 15 times [2024-06-20 15:18:32,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:32,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589791067] [2024-06-20 15:18:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:32,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:32,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:32,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589791067] [2024-06-20 15:18:32,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589791067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:32,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:32,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:32,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460201751] [2024-06-20 15:18:32,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:32,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:32,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:32,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:32,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:32,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:32,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 594 transitions, 9584 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:32,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:32,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:32,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:34,046 INFO L124 PetriNetUnfolderBase]: 3554/6009 cut-off events. [2024-06-20 15:18:34,047 INFO L125 PetriNetUnfolderBase]: For 1343058/1343058 co-relation queries the response was YES. [2024-06-20 15:18:34,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56793 conditions, 6009 events. 3554/6009 cut-off events. For 1343058/1343058 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41401 event pairs, 703 based on Foata normal form. 2/6003 useless extension candidates. Maximal degree in co-relation 56591. Up to 4680 conditions per place. [2024-06-20 15:18:34,147 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 280 changer transitions 0/614 dead transitions. [2024-06-20 15:18:34,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 614 transitions, 11360 flow [2024-06-20 15:18:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:18:34,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:18:34,149 INFO L175 Difference]: Start difference. First operand has 455 places, 594 transitions, 9584 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:18:34,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 614 transitions, 11360 flow [2024-06-20 15:18:40,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 614 transitions, 10996 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:40,144 INFO L231 Difference]: Finished difference. Result has 457 places, 594 transitions, 9787 flow [2024-06-20 15:18:40,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9220, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9787, PETRI_PLACES=457, PETRI_TRANSITIONS=594} [2024-06-20 15:18:40,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-20 15:18:40,144 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 594 transitions, 9787 flow [2024-06-20 15:18:40,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:40,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:40,145 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] [2024-06-20 15:18:40,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:18:40,145 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)] === [2024-06-20 15:18:40,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1150936911, now seen corresponding path program 16 times [2024-06-20 15:18:40,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:40,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903251273] [2024-06-20 15:18:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:40,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:40,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903251273] [2024-06-20 15:18:40,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903251273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:40,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:40,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:40,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005705864] [2024-06-20 15:18:40,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:40,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:40,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:40,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:40,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 594 transitions, 9787 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:40,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:40,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:40,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:41,622 INFO L124 PetriNetUnfolderBase]: 3551/5981 cut-off events. [2024-06-20 15:18:41,622 INFO L125 PetriNetUnfolderBase]: For 1350730/1350730 co-relation queries the response was YES. [2024-06-20 15:18:41,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57021 conditions, 5981 events. 3551/5981 cut-off events. For 1350730/1350730 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41043 event pairs, 676 based on Foata normal form. 1/5974 useless extension candidates. Maximal degree in co-relation 56819. Up to 5105 conditions per place. [2024-06-20 15:18:41,736 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 168 changer transitions 0/615 dead transitions. [2024-06-20 15:18:41,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 615 transitions, 11311 flow [2024-06-20 15:18:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:18:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:18:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-20 15:18:41,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-20 15:18:41,738 INFO L175 Difference]: Start difference. First operand has 457 places, 594 transitions, 9787 flow. Second operand 10 states and 232 transitions. [2024-06-20 15:18:41,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 615 transitions, 11311 flow [2024-06-20 15:18:47,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 615 transitions, 10672 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:18:47,018 INFO L231 Difference]: Finished difference. Result has 459 places, 594 transitions, 9490 flow [2024-06-20 15:18:47,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9148, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9490, PETRI_PLACES=459, PETRI_TRANSITIONS=594} [2024-06-20 15:18:47,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 15:18:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 594 transitions, 9490 flow [2024-06-20 15:18:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:47,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:47,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:18:47,019 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)] === [2024-06-20 15:18:47,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash 322143625, now seen corresponding path program 17 times [2024-06-20 15:18:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868386356] [2024-06-20 15:18:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:47,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:47,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868386356] [2024-06-20 15:18:47,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868386356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:47,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:47,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:18:47,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975059288] [2024-06-20 15:18:47,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:47,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:18:47,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:18:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:18:47,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:47,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 594 transitions, 9490 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:47,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:47,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:47,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:48,490 INFO L124 PetriNetUnfolderBase]: 3553/6020 cut-off events. [2024-06-20 15:18:48,491 INFO L125 PetriNetUnfolderBase]: For 1363124/1363124 co-relation queries the response was YES. [2024-06-20 15:18:48,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56781 conditions, 6020 events. 3553/6020 cut-off events. For 1363124/1363124 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 41475 event pairs, 678 based on Foata normal form. 2/6020 useless extension candidates. Maximal degree in co-relation 56578. Up to 5386 conditions per place. [2024-06-20 15:18:48,603 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 547 selfloop transitions, 58 changer transitions 0/613 dead transitions. [2024-06-20 15:18:48,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 613 transitions, 11050 flow [2024-06-20 15:18:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:18:48,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:18:48,605 INFO L175 Difference]: Start difference. First operand has 459 places, 594 transitions, 9490 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:18:48,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 613 transitions, 11050 flow [2024-06-20 15:18:54,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 613 transitions, 10583 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:54,537 INFO L231 Difference]: Finished difference. Result has 457 places, 597 transitions, 9199 flow [2024-06-20 15:18:54,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9023, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9199, PETRI_PLACES=457, PETRI_TRANSITIONS=597} [2024-06-20 15:18:54,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-20 15:18:54,538 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 597 transitions, 9199 flow [2024-06-20 15:18:54,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:54,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:54,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:18:54,539 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)] === [2024-06-20 15:18:54,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1314973057, now seen corresponding path program 16 times [2024-06-20 15:18:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:54,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607526261] [2024-06-20 15:18:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:54,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607526261] [2024-06-20 15:18:54,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607526261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:54,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:54,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:54,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504773700] [2024-06-20 15:18:54,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:54,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:54,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:54,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:54,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:18:54,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 597 transitions, 9199 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:54,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:54,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:18:54,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:56,167 INFO L124 PetriNetUnfolderBase]: 3595/6078 cut-off events. [2024-06-20 15:18:56,167 INFO L125 PetriNetUnfolderBase]: For 1416750/1416750 co-relation queries the response was YES. [2024-06-20 15:18:56,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57528 conditions, 6078 events. 3595/6078 cut-off events. For 1416750/1416750 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41878 event pairs, 668 based on Foata normal form. 2/6078 useless extension candidates. Maximal degree in co-relation 57324. Up to 5392 conditions per place. [2024-06-20 15:18:56,271 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 544 selfloop transitions, 78 changer transitions 0/630 dead transitions. [2024-06-20 15:18:56,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 630 transitions, 11521 flow [2024-06-20 15:18:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-20 15:18:56,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-20 15:18:56,272 INFO L175 Difference]: Start difference. First operand has 457 places, 597 transitions, 9199 flow. Second operand 9 states and 212 transitions. [2024-06-20 15:18:56,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 630 transitions, 11521 flow [2024-06-20 15:19:02,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 630 transitions, 11387 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:02,978 INFO L231 Difference]: Finished difference. Result has 461 places, 611 transitions, 9516 flow [2024-06-20 15:19:02,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9065, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9516, PETRI_PLACES=461, PETRI_TRANSITIONS=611} [2024-06-20 15:19:02,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-20 15:19:02,978 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 611 transitions, 9516 flow [2024-06-20 15:19:02,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:02,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:02,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:19:02,980 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)] === [2024-06-20 15:19:02,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash 321936235, now seen corresponding path program 18 times [2024-06-20 15:19:02,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338016432] [2024-06-20 15:19:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:02,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:03,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338016432] [2024-06-20 15:19:03,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338016432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:03,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:03,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:03,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836475373] [2024-06-20 15:19:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:03,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:03,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:03,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 611 transitions, 9516 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:03,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:03,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:03,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:04,721 INFO L124 PetriNetUnfolderBase]: 3589/6082 cut-off events. [2024-06-20 15:19:04,722 INFO L125 PetriNetUnfolderBase]: For 1418077/1418077 co-relation queries the response was YES. [2024-06-20 15:19:04,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57514 conditions, 6082 events. 3589/6082 cut-off events. For 1418077/1418077 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42053 event pairs, 678 based on Foata normal form. 2/6082 useless extension candidates. Maximal degree in co-relation 57308. Up to 5438 conditions per place. [2024-06-20 15:19:04,822 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 56 changer transitions 0/626 dead transitions. [2024-06-20 15:19:04,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 626 transitions, 10788 flow [2024-06-20 15:19:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:19:04,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 15:19:04,823 INFO L175 Difference]: Start difference. First operand has 461 places, 611 transitions, 9516 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:19:04,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 626 transitions, 10788 flow [2024-06-20 15:19:11,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 626 transitions, 10666 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:11,555 INFO L231 Difference]: Finished difference. Result has 466 places, 611 transitions, 9516 flow [2024-06-20 15:19:11,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9394, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9516, PETRI_PLACES=466, PETRI_TRANSITIONS=611} [2024-06-20 15:19:11,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-20 15:19:11,556 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 611 transitions, 9516 flow [2024-06-20 15:19:11,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:11,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:11,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:11,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:19:11,557 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)] === [2024-06-20 15:19:11,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:11,558 INFO L85 PathProgramCache]: Analyzing trace with hash 321936421, now seen corresponding path program 17 times [2024-06-20 15:19:11,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:11,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113825521] [2024-06-20 15:19:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:11,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:11,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:11,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113825521] [2024-06-20 15:19:11,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113825521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:11,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:11,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:11,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486360645] [2024-06-20 15:19:11,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:11,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:11,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:11,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 611 transitions, 9516 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:11,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:11,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:11,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:13,327 INFO L124 PetriNetUnfolderBase]: 3583/6090 cut-off events. [2024-06-20 15:19:13,327 INFO L125 PetriNetUnfolderBase]: For 1419734/1419734 co-relation queries the response was YES. [2024-06-20 15:19:13,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57378 conditions, 6090 events. 3583/6090 cut-off events. For 1419734/1419734 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42196 event pairs, 690 based on Foata normal form. 2/6090 useless extension candidates. Maximal degree in co-relation 57170. Up to 5382 conditions per place. [2024-06-20 15:19:13,427 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 541 selfloop transitions, 80 changer transitions 0/629 dead transitions. [2024-06-20 15:19:13,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 629 transitions, 11336 flow [2024-06-20 15:19:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 15:19:13,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-20 15:19:13,428 INFO L175 Difference]: Start difference. First operand has 466 places, 611 transitions, 9516 flow. Second operand 9 states and 210 transitions. [2024-06-20 15:19:13,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 629 transitions, 11336 flow [2024-06-20 15:19:19,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 629 transitions, 11182 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:19,723 INFO L231 Difference]: Finished difference. Result has 468 places, 611 transitions, 9529 flow [2024-06-20 15:19:19,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9362, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9529, PETRI_PLACES=468, PETRI_TRANSITIONS=611} [2024-06-20 15:19:19,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-20 15:19:19,724 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 611 transitions, 9529 flow [2024-06-20 15:19:19,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:19,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:19,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:19,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:19:19,724 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)] === [2024-06-20 15:19:19,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash 401524193, now seen corresponding path program 18 times [2024-06-20 15:19:19,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:19,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482830350] [2024-06-20 15:19:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:19,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:19,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:19,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482830350] [2024-06-20 15:19:19,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482830350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:19,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:19,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186040236] [2024-06-20 15:19:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:19,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:19,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:19,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:19,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:19,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:19,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 611 transitions, 9529 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:19,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:19,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:19,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:21,447 INFO L124 PetriNetUnfolderBase]: 3617/6123 cut-off events. [2024-06-20 15:19:21,447 INFO L125 PetriNetUnfolderBase]: For 1470975/1470975 co-relation queries the response was YES. [2024-06-20 15:19:21,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58311 conditions, 6123 events. 3617/6123 cut-off events. For 1470975/1470975 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42328 event pairs, 670 based on Foata normal form. 2/6123 useless extension candidates. Maximal degree in co-relation 58102. Up to 5069 conditions per place. [2024-06-20 15:19:21,546 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 454 selfloop transitions, 193 changer transitions 0/655 dead transitions. [2024-06-20 15:19:21,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 655 transitions, 11949 flow [2024-06-20 15:19:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-20 15:19:21,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-20 15:19:21,547 INFO L175 Difference]: Start difference. First operand has 468 places, 611 transitions, 9529 flow. Second operand 9 states and 229 transitions. [2024-06-20 15:19:21,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 655 transitions, 11949 flow [2024-06-20 15:19:27,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 655 transitions, 11803 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:27,330 INFO L231 Difference]: Finished difference. Result has 471 places, 624 transitions, 10144 flow [2024-06-20 15:19:27,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10144, PETRI_PLACES=471, PETRI_TRANSITIONS=624} [2024-06-20 15:19:27,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-20 15:19:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 624 transitions, 10144 flow [2024-06-20 15:19:27,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:27,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:27,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:27,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:19:27,331 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)] === [2024-06-20 15:19:27,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1281807379, now seen corresponding path program 19 times [2024-06-20 15:19:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:27,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769343660] [2024-06-20 15:19:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:27,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:27,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:27,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769343660] [2024-06-20 15:19:27,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769343660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:27,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:27,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73143284] [2024-06-20 15:19:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:27,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:27,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:27,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 624 transitions, 10144 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:27,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:27,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:27,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:29,209 INFO L124 PetriNetUnfolderBase]: 3619/6112 cut-off events. [2024-06-20 15:19:29,209 INFO L125 PetriNetUnfolderBase]: For 1488780/1488780 co-relation queries the response was YES. [2024-06-20 15:19:29,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59019 conditions, 6112 events. 3619/6112 cut-off events. For 1488780/1488780 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42154 event pairs, 658 based on Foata normal form. 2/6112 useless extension candidates. Maximal degree in co-relation 58808. Up to 5220 conditions per place. [2024-06-20 15:19:29,304 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 492 selfloop transitions, 158 changer transitions 0/658 dead transitions. [2024-06-20 15:19:29,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 658 transitions, 11856 flow [2024-06-20 15:19:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:19:29,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-20 15:19:29,305 INFO L175 Difference]: Start difference. First operand has 471 places, 624 transitions, 10144 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:19:29,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 658 transitions, 11856 flow [2024-06-20 15:19:35,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 658 transitions, 11718 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:35,163 INFO L231 Difference]: Finished difference. Result has 475 places, 627 transitions, 10409 flow [2024-06-20 15:19:35,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10008, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10409, PETRI_PLACES=475, PETRI_TRANSITIONS=627} [2024-06-20 15:19:35,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-20 15:19:35,163 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 627 transitions, 10409 flow [2024-06-20 15:19:35,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:35,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:35,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:35,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:19:35,164 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)] === [2024-06-20 15:19:35,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash -101251227, now seen corresponding path program 19 times [2024-06-20 15:19:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:35,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408412040] [2024-06-20 15:19:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:35,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408412040] [2024-06-20 15:19:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408412040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:35,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:35,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:35,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469488936] [2024-06-20 15:19:35,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:35,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:35,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:35,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:35,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:35,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 627 transitions, 10409 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:35,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:35,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:35,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:36,913 INFO L124 PetriNetUnfolderBase]: 3632/6151 cut-off events. [2024-06-20 15:19:36,914 INFO L125 PetriNetUnfolderBase]: For 1490540/1490543 co-relation queries the response was YES. [2024-06-20 15:19:36,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59703 conditions, 6151 events. 3632/6151 cut-off events. For 1490540/1490543 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42577 event pairs, 679 based on Foata normal form. 3/6151 useless extension candidates. Maximal degree in co-relation 59491. Up to 5083 conditions per place. [2024-06-20 15:19:37,012 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 440 selfloop transitions, 210 changer transitions 0/658 dead transitions. [2024-06-20 15:19:37,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 658 transitions, 12996 flow [2024-06-20 15:19:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:19:37,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:19:37,013 INFO L175 Difference]: Start difference. First operand has 475 places, 627 transitions, 10409 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:19:37,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 658 transitions, 12996 flow [2024-06-20 15:19:43,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 658 transitions, 12642 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:43,506 INFO L231 Difference]: Finished difference. Result has 475 places, 633 transitions, 10636 flow [2024-06-20 15:19:43,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10071, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10636, PETRI_PLACES=475, PETRI_TRANSITIONS=633} [2024-06-20 15:19:43,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-20 15:19:43,506 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 633 transitions, 10636 flow [2024-06-20 15:19:43,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:43,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:43,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:43,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:19:43,507 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)] === [2024-06-20 15:19:43,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1282014769, now seen corresponding path program 20 times [2024-06-20 15:19:43,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:43,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495655178] [2024-06-20 15:19:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:43,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495655178] [2024-06-20 15:19:43,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495655178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:43,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:43,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235067378] [2024-06-20 15:19:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:43,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:43,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 633 transitions, 10636 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:43,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:43,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:43,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:45,233 INFO L124 PetriNetUnfolderBase]: 3634/6151 cut-off events. [2024-06-20 15:19:45,233 INFO L125 PetriNetUnfolderBase]: For 1468885/1468885 co-relation queries the response was YES. [2024-06-20 15:19:45,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59578 conditions, 6151 events. 3634/6151 cut-off events. For 1468885/1468885 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42549 event pairs, 668 based on Foata normal form. 2/6151 useless extension candidates. Maximal degree in co-relation 59367. Up to 5241 conditions per place. [2024-06-20 15:19:45,331 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 154 changer transitions 0/667 dead transitions. [2024-06-20 15:19:45,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 667 transitions, 12370 flow [2024-06-20 15:19:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:19:45,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-20 15:19:45,332 INFO L175 Difference]: Start difference. First operand has 475 places, 633 transitions, 10636 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:19:45,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 667 transitions, 12370 flow [2024-06-20 15:19:51,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 667 transitions, 11732 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:51,500 INFO L231 Difference]: Finished difference. Result has 478 places, 636 transitions, 10399 flow [2024-06-20 15:19:51,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10001, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10399, PETRI_PLACES=478, PETRI_TRANSITIONS=636} [2024-06-20 15:19:51,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-20 15:19:51,501 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 636 transitions, 10399 flow [2024-06-20 15:19:51,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:51,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:51,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:51,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:19:51,502 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)] === [2024-06-20 15:19:51,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash 401138243, now seen corresponding path program 20 times [2024-06-20 15:19:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:51,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720806206] [2024-06-20 15:19:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:51,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:51,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720806206] [2024-06-20 15:19:51,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720806206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:51,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:51,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:51,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920688469] [2024-06-20 15:19:51,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:51,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:51,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:51,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 636 transitions, 10399 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:51,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:51,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:51,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:53,297 INFO L124 PetriNetUnfolderBase]: 3628/6155 cut-off events. [2024-06-20 15:19:53,297 INFO L125 PetriNetUnfolderBase]: For 1466543/1466543 co-relation queries the response was YES. [2024-06-20 15:19:53,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59213 conditions, 6155 events. 3628/6155 cut-off events. For 1466543/1466543 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42716 event pairs, 678 based on Foata normal form. 2/6155 useless extension candidates. Maximal degree in co-relation 59001. Up to 5082 conditions per place. [2024-06-20 15:19:53,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 452 selfloop transitions, 209 changer transitions 0/669 dead transitions. [2024-06-20 15:19:53,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 669 transitions, 12347 flow [2024-06-20 15:19:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-20 15:19:53,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 15:19:53,396 INFO L175 Difference]: Start difference. First operand has 478 places, 636 transitions, 10399 flow. Second operand 9 states and 231 transitions. [2024-06-20 15:19:53,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 669 transitions, 12347 flow [2024-06-20 15:19:59,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 669 transitions, 12070 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:59,381 INFO L231 Difference]: Finished difference. Result has 480 places, 636 transitions, 10560 flow [2024-06-20 15:19:59,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10130, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10560, PETRI_PLACES=480, PETRI_TRANSITIONS=636} [2024-06-20 15:19:59,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 15:19:59,382 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 636 transitions, 10560 flow [2024-06-20 15:19:59,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:59,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:59,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:19:59,382 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)] === [2024-06-20 15:19:59,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash -623936031, now seen corresponding path program 21 times [2024-06-20 15:19:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104224301] [2024-06-20 15:19:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:59,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104224301] [2024-06-20 15:19:59,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104224301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:59,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:59,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632651623] [2024-06-20 15:19:59,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:59,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:59,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:59,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:59,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:59,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:59,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 636 transitions, 10560 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:59,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:59,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:01,138 INFO L124 PetriNetUnfolderBase]: 3633/6141 cut-off events. [2024-06-20 15:20:01,138 INFO L125 PetriNetUnfolderBase]: For 1442703/1442706 co-relation queries the response was YES. [2024-06-20 15:20:01,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59270 conditions, 6141 events. 3633/6141 cut-off events. For 1442703/1442706 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42469 event pairs, 667 based on Foata normal form. 3/6141 useless extension candidates. Maximal degree in co-relation 59059. Up to 5086 conditions per place. [2024-06-20 15:20:01,237 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 216 changer transitions 0/667 dead transitions. [2024-06-20 15:20:01,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 667 transitions, 13081 flow [2024-06-20 15:20:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:20:01,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:20:01,238 INFO L175 Difference]: Start difference. First operand has 480 places, 636 transitions, 10560 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:20:01,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 667 transitions, 13081 flow [2024-06-20 15:20:07,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 667 transitions, 12678 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:07,200 INFO L231 Difference]: Finished difference. Result has 480 places, 639 transitions, 10658 flow [2024-06-20 15:20:07,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10169, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10658, PETRI_PLACES=480, PETRI_TRANSITIONS=639} [2024-06-20 15:20:07,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 15:20:07,200 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 639 transitions, 10658 flow [2024-06-20 15:20:07,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:07,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:07,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:07,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:20:07,201 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)] === [2024-06-20 15:20:07,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:07,201 INFO L85 PathProgramCache]: Analyzing trace with hash -400796481, now seen corresponding path program 22 times [2024-06-20 15:20:07,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:07,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192922092] [2024-06-20 15:20:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:07,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:07,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192922092] [2024-06-20 15:20:07,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192922092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:07,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:07,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:07,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729187680] [2024-06-20 15:20:07,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:07,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:07,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:07,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:07,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 639 transitions, 10658 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:07,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:07,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:07,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:08,900 INFO L124 PetriNetUnfolderBase]: 3643/6168 cut-off events. [2024-06-20 15:20:08,900 INFO L125 PetriNetUnfolderBase]: For 1439883/1439883 co-relation queries the response was YES. [2024-06-20 15:20:08,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59432 conditions, 6168 events. 3643/6168 cut-off events. For 1439883/1439883 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 42712 event pairs, 668 based on Foata normal form. 1/6167 useless extension candidates. Maximal degree in co-relation 59221. Up to 5532 conditions per place. [2024-06-20 15:20:09,005 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 619 selfloop transitions, 35 changer transitions 0/662 dead transitions. [2024-06-20 15:20:09,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 662 transitions, 12115 flow [2024-06-20 15:20:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:09,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:20:09,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 15:20:09,007 INFO L175 Difference]: Start difference. First operand has 480 places, 639 transitions, 10658 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:20:09,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 662 transitions, 12115 flow [2024-06-20 15:20:15,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 662 transitions, 11501 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:15,617 INFO L231 Difference]: Finished difference. Result has 480 places, 645 transitions, 10233 flow [2024-06-20 15:20:15,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10065, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10233, PETRI_PLACES=480, PETRI_TRANSITIONS=645} [2024-06-20 15:20:15,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 15:20:15,618 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 645 transitions, 10233 flow [2024-06-20 15:20:15,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:15,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:15,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:15,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:20:15,618 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)] === [2024-06-20 15:20:15,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1958284139, now seen corresponding path program 23 times [2024-06-20 15:20:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:15,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92595263] [2024-06-20 15:20:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:15,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92595263] [2024-06-20 15:20:15,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92595263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:15,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:15,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:15,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378979691] [2024-06-20 15:20:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:15,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:15,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:15,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 645 transitions, 10233 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:17,320 INFO L124 PetriNetUnfolderBase]: 3640/6181 cut-off events. [2024-06-20 15:20:17,320 INFO L125 PetriNetUnfolderBase]: For 1444927/1444930 co-relation queries the response was YES. [2024-06-20 15:20:17,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58852 conditions, 6181 events. 3640/6181 cut-off events. For 1444927/1444930 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43016 event pairs, 689 based on Foata normal form. 3/6181 useless extension candidates. Maximal degree in co-relation 58640. Up to 5092 conditions per place. [2024-06-20 15:20:17,424 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 224 changer transitions 0/675 dead transitions. [2024-06-20 15:20:17,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 675 transitions, 12457 flow [2024-06-20 15:20:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:20:17,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:20:17,425 INFO L175 Difference]: Start difference. First operand has 480 places, 645 transitions, 10233 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:20:17,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 675 transitions, 12457 flow [2024-06-20 15:20:22,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 675 transitions, 12345 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:22,678 INFO L231 Difference]: Finished difference. Result has 484 places, 645 transitions, 10575 flow [2024-06-20 15:20:22,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10121, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10575, PETRI_PLACES=484, PETRI_TRANSITIONS=645} [2024-06-20 15:20:22,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-20 15:20:22,679 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 645 transitions, 10575 flow [2024-06-20 15:20:22,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:22,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:22,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:22,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:20:22,680 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)] === [2024-06-20 15:20:22,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash -771931767, now seen corresponding path program 21 times [2024-06-20 15:20:22,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:22,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735366396] [2024-06-20 15:20:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:22,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735366396] [2024-06-20 15:20:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735366396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:22,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:22,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:22,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662737509] [2024-06-20 15:20:22,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:22,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:22,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:22,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:22,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:22,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:22,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 645 transitions, 10575 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:22,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:22,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:22,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:24,301 INFO L124 PetriNetUnfolderBase]: 3634/6180 cut-off events. [2024-06-20 15:20:24,301 INFO L125 PetriNetUnfolderBase]: For 1454921/1454921 co-relation queries the response was YES. [2024-06-20 15:20:24,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59165 conditions, 6180 events. 3634/6180 cut-off events. For 1454921/1454921 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 43045 event pairs, 688 based on Foata normal form. 2/6180 useless extension candidates. Maximal degree in co-relation 58952. Up to 5403 conditions per place. [2024-06-20 15:20:24,398 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 581 selfloop transitions, 80 changer transitions 0/669 dead transitions. [2024-06-20 15:20:24,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 669 transitions, 11995 flow [2024-06-20 15:20:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 15:20:24,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-20 15:20:24,399 INFO L175 Difference]: Start difference. First operand has 484 places, 645 transitions, 10575 flow. Second operand 6 states and 161 transitions. [2024-06-20 15:20:24,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 669 transitions, 11995 flow [2024-06-20 15:20:30,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 669 transitions, 11525 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:30,496 INFO L231 Difference]: Finished difference. Result has 485 places, 647 transitions, 10394 flow [2024-06-20 15:20:30,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10109, 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=6, PETRI_FLOW=10394, PETRI_PLACES=485, PETRI_TRANSITIONS=647} [2024-06-20 15:20:30,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-20 15:20:30,497 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 647 transitions, 10394 flow [2024-06-20 15:20:30,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:30,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:30,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:30,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:20:30,497 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)] === [2024-06-20 15:20:30,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash -771694431, now seen corresponding path program 24 times [2024-06-20 15:20:30,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:30,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85540348] [2024-06-20 15:20:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:30,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:30,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85540348] [2024-06-20 15:20:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85540348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:30,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766955553] [2024-06-20 15:20:30,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:30,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:30,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:30,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:30,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 647 transitions, 10394 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:30,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:30,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:30,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:32,100 INFO L124 PetriNetUnfolderBase]: 3631/6176 cut-off events. [2024-06-20 15:20:32,100 INFO L125 PetriNetUnfolderBase]: For 1456940/1456940 co-relation queries the response was YES. [2024-06-20 15:20:32,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58935 conditions, 6176 events. 3631/6176 cut-off events. For 1456940/1456940 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 42993 event pairs, 688 based on Foata normal form. 1/6175 useless extension candidates. Maximal degree in co-relation 58720. Up to 5494 conditions per place. [2024-06-20 15:20:32,408 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 616 selfloop transitions, 52 changer transitions 0/676 dead transitions. [2024-06-20 15:20:32,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 676 transitions, 12078 flow [2024-06-20 15:20:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 15:20:32,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:20:32,409 INFO L175 Difference]: Start difference. First operand has 485 places, 647 transitions, 10394 flow. Second operand 9 states and 216 transitions. [2024-06-20 15:20:32,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 676 transitions, 12078 flow [2024-06-20 15:20:37,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 676 transitions, 11739 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:37,952 INFO L231 Difference]: Finished difference. Result has 486 places, 647 transitions, 10167 flow [2024-06-20 15:20:37,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10057, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10167, PETRI_PLACES=486, PETRI_TRANSITIONS=647} [2024-06-20 15:20:37,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-20 15:20:37,956 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 647 transitions, 10167 flow [2024-06-20 15:20:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:37,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:37,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:37,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:20:37,957 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)] === [2024-06-20 15:20:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1962003209, now seen corresponding path program 25 times [2024-06-20 15:20:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405234823] [2024-06-20 15:20:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:38,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405234823] [2024-06-20 15:20:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405234823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:38,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:38,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:38,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557294014] [2024-06-20 15:20:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:38,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:38,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:38,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:38,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 647 transitions, 10167 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:38,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:38,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:38,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:39,712 INFO L124 PetriNetUnfolderBase]: 3628/6172 cut-off events. [2024-06-20 15:20:39,712 INFO L125 PetriNetUnfolderBase]: For 1444671/1444671 co-relation queries the response was YES. [2024-06-20 15:20:39,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58432 conditions, 6172 events. 3628/6172 cut-off events. For 1444671/1444671 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 42944 event pairs, 688 based on Foata normal form. 1/6171 useless extension candidates. Maximal degree in co-relation 58219. Up to 5491 conditions per place. [2024-06-20 15:20:39,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 614 selfloop transitions, 51 changer transitions 0/673 dead transitions. [2024-06-20 15:20:39,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 673 transitions, 11563 flow [2024-06-20 15:20:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:20:39,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-20 15:20:39,810 INFO L175 Difference]: Start difference. First operand has 486 places, 647 transitions, 10167 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:20:39,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 673 transitions, 11563 flow [2024-06-20 15:20:45,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 673 transitions, 11313 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 15:20:45,787 INFO L231 Difference]: Finished difference. Result has 483 places, 647 transitions, 10025 flow [2024-06-20 15:20:45,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9917, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10025, PETRI_PLACES=483, PETRI_TRANSITIONS=647} [2024-06-20 15:20:45,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-20 15:20:45,788 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 647 transitions, 10025 flow [2024-06-20 15:20:45,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:45,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:45,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:45,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:20:45,789 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)] === [2024-06-20 15:20:45,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash -772023837, now seen corresponding path program 4 times [2024-06-20 15:20:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:45,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018700576] [2024-06-20 15:20:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018700576] [2024-06-20 15:20:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018700576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:45,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:45,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514241240] [2024-06-20 15:20:45,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:45,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:45,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:45,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 647 transitions, 10025 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:45,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:45,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:45,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:47,544 INFO L124 PetriNetUnfolderBase]: 3615/6157 cut-off events. [2024-06-20 15:20:47,544 INFO L125 PetriNetUnfolderBase]: For 1454489/1454489 co-relation queries the response was YES. [2024-06-20 15:20:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57524 conditions, 6157 events. 3615/6157 cut-off events. For 1454489/1454489 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42874 event pairs, 601 based on Foata normal form. 6/6161 useless extension candidates. Maximal degree in co-relation 57310. Up to 5368 conditions per place. [2024-06-20 15:20:47,641 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 632 selfloop transitions, 40 changer transitions 0/680 dead transitions. [2024-06-20 15:20:47,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 680 transitions, 11493 flow [2024-06-20 15:20:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:20:47,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:20:47,643 INFO L175 Difference]: Start difference. First operand has 483 places, 647 transitions, 10025 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:20:47,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 680 transitions, 11493 flow [2024-06-20 15:20:53,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 680 transitions, 11387 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:53,274 INFO L231 Difference]: Finished difference. Result has 484 places, 647 transitions, 10003 flow [2024-06-20 15:20:53,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9919, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10003, PETRI_PLACES=484, PETRI_TRANSITIONS=647} [2024-06-20 15:20:53,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-20 15:20:53,274 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 647 transitions, 10003 flow [2024-06-20 15:20:53,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:53,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:53,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:53,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:20:53,275 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)] === [2024-06-20 15:20:53,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1857268731, now seen corresponding path program 3 times [2024-06-20 15:20:53,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:53,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224206590] [2024-06-20 15:20:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:53,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224206590] [2024-06-20 15:20:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224206590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:53,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:53,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766141053] [2024-06-20 15:20:53,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:53,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:53,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:53,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:53,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:53,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 647 transitions, 10003 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:53,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:53,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:53,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:55,003 INFO L124 PetriNetUnfolderBase]: 3649/6199 cut-off events. [2024-06-20 15:20:55,003 INFO L125 PetriNetUnfolderBase]: For 1476429/1476429 co-relation queries the response was YES. [2024-06-20 15:20:55,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58669 conditions, 6199 events. 3649/6199 cut-off events. For 1476429/1476429 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 43100 event pairs, 686 based on Foata normal form. 2/6194 useless extension candidates. Maximal degree in co-relation 58454. Up to 5407 conditions per place. [2024-06-20 15:20:55,102 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 594 selfloop transitions, 74 changer transitions 0/676 dead transitions. [2024-06-20 15:20:55,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 676 transitions, 11811 flow [2024-06-20 15:20:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:20:55,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:20:55,103 INFO L175 Difference]: Start difference. First operand has 484 places, 647 transitions, 10003 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:20:55,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 676 transitions, 11811 flow [2024-06-20 15:21:01,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 676 transitions, 11705 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:01,122 INFO L231 Difference]: Finished difference. Result has 487 places, 653 transitions, 10205 flow [2024-06-20 15:21:01,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9897, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10205, PETRI_PLACES=487, PETRI_TRANSITIONS=653} [2024-06-20 15:21:01,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 15:21:01,123 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 653 transitions, 10205 flow [2024-06-20 15:21:01,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:01,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:01,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:01,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:21:01,123 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)] === [2024-06-20 15:21:01,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1575251991, now seen corresponding path program 4 times [2024-06-20 15:21:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:01,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639903211] [2024-06-20 15:21:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:01,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:01,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:01,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639903211] [2024-06-20 15:21:01,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639903211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:01,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:01,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:01,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578593574] [2024-06-20 15:21:01,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:01,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:01,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 653 transitions, 10205 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:01,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:01,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:01,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:02,789 INFO L124 PetriNetUnfolderBase]: 3657/6214 cut-off events. [2024-06-20 15:21:02,790 INFO L125 PetriNetUnfolderBase]: For 1497727/1497727 co-relation queries the response was YES. [2024-06-20 15:21:02,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59097 conditions, 6214 events. 3657/6214 cut-off events. For 1497727/1497727 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43306 event pairs, 693 based on Foata normal form. 2/6211 useless extension candidates. Maximal degree in co-relation 58880. Up to 5461 conditions per place. [2024-06-20 15:21:02,890 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 596 selfloop transitions, 69 changer transitions 0/673 dead transitions. [2024-06-20 15:21:02,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 673 transitions, 11631 flow [2024-06-20 15:21:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:21:02,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:21:02,891 INFO L175 Difference]: Start difference. First operand has 487 places, 653 transitions, 10205 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:21:02,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 673 transitions, 11631 flow [2024-06-20 15:21:09,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 673 transitions, 11445 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-20 15:21:09,495 INFO L231 Difference]: Finished difference. Result has 491 places, 655 transitions, 10218 flow [2024-06-20 15:21:09,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10041, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10218, PETRI_PLACES=491, PETRI_TRANSITIONS=655} [2024-06-20 15:21:09,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-20 15:21:09,496 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 655 transitions, 10218 flow [2024-06-20 15:21:09,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:09,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:09,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:09,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:21:09,504 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)] === [2024-06-20 15:21:09,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:09,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1151152237, now seen corresponding path program 5 times [2024-06-20 15:21:09,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:09,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016671082] [2024-06-20 15:21:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:09,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:09,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016671082] [2024-06-20 15:21:09,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016671082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:09,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:09,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:09,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396761476] [2024-06-20 15:21:09,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:09,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:09,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:09,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:09,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:09,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 655 transitions, 10218 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:09,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:09,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:09,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:11,241 INFO L124 PetriNetUnfolderBase]: 3652/6207 cut-off events. [2024-06-20 15:21:11,241 INFO L125 PetriNetUnfolderBase]: For 1497017/1497017 co-relation queries the response was YES. [2024-06-20 15:21:11,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58850 conditions, 6207 events. 3652/6207 cut-off events. For 1497017/1497017 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43218 event pairs, 692 based on Foata normal form. 2/6204 useless extension candidates. Maximal degree in co-relation 58631. Up to 5454 conditions per place. [2024-06-20 15:21:11,348 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 597 selfloop transitions, 69 changer transitions 0/674 dead transitions. [2024-06-20 15:21:11,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 674 transitions, 11596 flow [2024-06-20 15:21:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:21:11,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 15:21:11,350 INFO L175 Difference]: Start difference. First operand has 491 places, 655 transitions, 10218 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:21:11,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 674 transitions, 11596 flow [2024-06-20 15:21:18,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 674 transitions, 11427 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:18,236 INFO L231 Difference]: Finished difference. Result has 494 places, 655 transitions, 10192 flow [2024-06-20 15:21:18,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10049, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10192, PETRI_PLACES=494, PETRI_TRANSITIONS=655} [2024-06-20 15:21:18,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 15:21:18,237 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 655 transitions, 10192 flow [2024-06-20 15:21:18,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:18,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:18,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:18,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:21:18,237 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)] === [2024-06-20 15:21:18,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:18,238 INFO L85 PathProgramCache]: Analyzing trace with hash 872177155, now seen corresponding path program 5 times [2024-06-20 15:21:18,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:18,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161771312] [2024-06-20 15:21:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:18,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:18,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:18,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161771312] [2024-06-20 15:21:18,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161771312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:18,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:18,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125705271] [2024-06-20 15:21:18,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:18,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:18,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:18,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:18,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 655 transitions, 10192 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:18,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:18,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:18,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:19,961 INFO L124 PetriNetUnfolderBase]: 3629/6174 cut-off events. [2024-06-20 15:21:19,962 INFO L125 PetriNetUnfolderBase]: For 1496429/1496429 co-relation queries the response was YES. [2024-06-20 15:21:20,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57257 conditions, 6174 events. 3629/6174 cut-off events. For 1496429/1496429 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43037 event pairs, 687 based on Foata normal form. 10/6179 useless extension candidates. Maximal degree in co-relation 57037. Up to 5231 conditions per place. [2024-06-20 15:21:20,064 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 496 selfloop transitions, 174 changer transitions 0/678 dead transitions. [2024-06-20 15:21:20,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 678 transitions, 11637 flow [2024-06-20 15:21:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:21:20,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:21:20,066 INFO L175 Difference]: Start difference. First operand has 494 places, 655 transitions, 10192 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:21:20,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 678 transitions, 11637 flow [2024-06-20 15:21:26,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 678 transitions, 11456 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:26,490 INFO L231 Difference]: Finished difference. Result has 496 places, 656 transitions, 10392 flow [2024-06-20 15:21:26,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10019, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10392, PETRI_PLACES=496, PETRI_TRANSITIONS=656} [2024-06-20 15:21:26,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-20 15:21:26,491 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 656 transitions, 10392 flow [2024-06-20 15:21:26,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:26,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:26,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:26,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:21:26,491 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)] === [2024-06-20 15:21:26,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1295408123, now seen corresponding path program 6 times [2024-06-20 15:21:26,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:26,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076208149] [2024-06-20 15:21:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:26,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:26,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076208149] [2024-06-20 15:21:26,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076208149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:26,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:26,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:26,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370891309] [2024-06-20 15:21:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:26,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:26,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:26,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:26,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 656 transitions, 10392 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:26,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:26,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:28,263 INFO L124 PetriNetUnfolderBase]: 3637/6190 cut-off events. [2024-06-20 15:21:28,264 INFO L125 PetriNetUnfolderBase]: For 1435464/1435464 co-relation queries the response was YES. [2024-06-20 15:21:28,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57646 conditions, 6190 events. 3637/6190 cut-off events. For 1435464/1435464 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 43038 event pairs, 562 based on Foata normal form. 2/6187 useless extension candidates. Maximal degree in co-relation 57425. Up to 5220 conditions per place. [2024-06-20 15:21:28,363 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 586 selfloop transitions, 92 changer transitions 0/686 dead transitions. [2024-06-20 15:21:28,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 686 transitions, 12514 flow [2024-06-20 15:21:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:21:28,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:21:28,364 INFO L175 Difference]: Start difference. First operand has 496 places, 656 transitions, 10392 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:21:28,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 686 transitions, 12514 flow [2024-06-20 15:21:35,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 686 transitions, 12158 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:35,315 INFO L231 Difference]: Finished difference. Result has 498 places, 661 transitions, 10372 flow [2024-06-20 15:21:35,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10036, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10372, PETRI_PLACES=498, PETRI_TRANSITIONS=661} [2024-06-20 15:21:35,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-20 15:21:35,316 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 661 transitions, 10372 flow [2024-06-20 15:21:35,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:35,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:35,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:35,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:21:35,316 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)] === [2024-06-20 15:21:35,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1283027963, now seen corresponding path program 7 times [2024-06-20 15:21:35,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:35,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567715600] [2024-06-20 15:21:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:35,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567715600] [2024-06-20 15:21:35,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567715600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:35,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:35,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112879413] [2024-06-20 15:21:35,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:35,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:35,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:35,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 661 transitions, 10372 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:35,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:35,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:35,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:37,100 INFO L124 PetriNetUnfolderBase]: 3645/6218 cut-off events. [2024-06-20 15:21:37,101 INFO L125 PetriNetUnfolderBase]: For 1453301/1453301 co-relation queries the response was YES. [2024-06-20 15:21:37,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57897 conditions, 6218 events. 3645/6218 cut-off events. For 1453301/1453301 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43514 event pairs, 586 based on Foata normal form. 2/6215 useless extension candidates. Maximal degree in co-relation 57674. Up to 5337 conditions per place. [2024-06-20 15:21:37,202 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 93 changer transitions 0/687 dead transitions. [2024-06-20 15:21:37,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 687 transitions, 11844 flow [2024-06-20 15:21:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:21:37,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:21:37,203 INFO L175 Difference]: Start difference. First operand has 498 places, 661 transitions, 10372 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:21:37,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 687 transitions, 11844 flow [2024-06-20 15:21:43,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 687 transitions, 11565 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:43,815 INFO L231 Difference]: Finished difference. Result has 502 places, 663 transitions, 10344 flow [2024-06-20 15:21:43,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10344, PETRI_PLACES=502, PETRI_TRANSITIONS=663} [2024-06-20 15:21:43,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-20 15:21:43,816 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 663 transitions, 10344 flow [2024-06-20 15:21:43,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:43,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:43,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:21:43,817 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)] === [2024-06-20 15:21:43,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1462510597, now seen corresponding path program 8 times [2024-06-20 15:21:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:43,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537451902] [2024-06-20 15:21:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:43,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:43,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:43,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537451902] [2024-06-20 15:21:43,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537451902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:43,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:43,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500973759] [2024-06-20 15:21:43,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:43,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:43,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:43,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:43,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 663 transitions, 10344 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:43,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:43,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:43,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:45,375 INFO L124 PetriNetUnfolderBase]: 3640/6195 cut-off events. [2024-06-20 15:21:45,375 INFO L125 PetriNetUnfolderBase]: For 1449263/1449263 co-relation queries the response was YES. [2024-06-20 15:21:45,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57430 conditions, 6195 events. 3640/6195 cut-off events. For 1449263/1449263 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43213 event pairs, 680 based on Foata normal form. 2/6188 useless extension candidates. Maximal degree in co-relation 57206. Up to 5415 conditions per place. [2024-06-20 15:21:45,673 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 599 selfloop transitions, 78 changer transitions 0/685 dead transitions. [2024-06-20 15:21:45,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 685 transitions, 12042 flow [2024-06-20 15:21:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:21:45,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 15:21:45,675 INFO L175 Difference]: Start difference. First operand has 502 places, 663 transitions, 10344 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:21:45,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 685 transitions, 12042 flow [2024-06-20 15:21:52,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 685 transitions, 11839 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:52,294 INFO L231 Difference]: Finished difference. Result has 505 places, 663 transitions, 10302 flow [2024-06-20 15:21:52,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10141, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10302, PETRI_PLACES=505, PETRI_TRANSITIONS=663} [2024-06-20 15:21:52,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-20 15:21:52,294 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 663 transitions, 10302 flow [2024-06-20 15:21:52,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:52,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:52,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:52,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:21:52,295 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)] === [2024-06-20 15:21:52,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1452987397, now seen corresponding path program 9 times [2024-06-20 15:21:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:52,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742288504] [2024-06-20 15:21:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:52,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742288504] [2024-06-20 15:21:52,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742288504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:52,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:52,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033186570] [2024-06-20 15:21:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:52,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:52,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 663 transitions, 10302 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:52,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:52,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:52,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:54,095 INFO L124 PetriNetUnfolderBase]: 3635/6192 cut-off events. [2024-06-20 15:21:54,096 INFO L125 PetriNetUnfolderBase]: For 1446175/1446175 co-relation queries the response was YES. [2024-06-20 15:21:54,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57107 conditions, 6192 events. 3635/6192 cut-off events. For 1446175/1446175 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43252 event pairs, 685 based on Foata normal form. 2/6189 useless extension candidates. Maximal degree in co-relation 56882. Up to 5431 conditions per place. [2024-06-20 15:21:54,198 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 601 selfloop transitions, 73 changer transitions 0/682 dead transitions. [2024-06-20 15:21:54,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 682 transitions, 11696 flow [2024-06-20 15:21:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:21:54,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 15:21:54,199 INFO L175 Difference]: Start difference. First operand has 505 places, 663 transitions, 10302 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:21:54,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 682 transitions, 11696 flow [2024-06-20 15:22:00,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 682 transitions, 11502 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:00,939 INFO L231 Difference]: Finished difference. Result has 507 places, 663 transitions, 10259 flow [2024-06-20 15:22:00,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10108, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10259, PETRI_PLACES=507, PETRI_TRANSITIONS=663} [2024-06-20 15:22:00,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-20 15:22:00,942 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 663 transitions, 10259 flow [2024-06-20 15:22:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:00,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:00,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:00,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:22:00,942 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)] === [2024-06-20 15:22:00,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash 578652071, now seen corresponding path program 10 times [2024-06-20 15:22:00,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:00,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139430084] [2024-06-20 15:22:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:01,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:01,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139430084] [2024-06-20 15:22:01,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139430084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:01,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:01,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:01,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652471280] [2024-06-20 15:22:01,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:01,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:01,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:01,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 663 transitions, 10259 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:01,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:01,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:01,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:02,736 INFO L124 PetriNetUnfolderBase]: 3679/6271 cut-off events. [2024-06-20 15:22:02,736 INFO L125 PetriNetUnfolderBase]: For 1575218/1575218 co-relation queries the response was YES. [2024-06-20 15:22:02,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57807 conditions, 6271 events. 3679/6271 cut-off events. For 1575218/1575218 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43889 event pairs, 683 based on Foata normal form. 12/6281 useless extension candidates. Maximal degree in co-relation 57581. Up to 5555 conditions per place. [2024-06-20 15:22:02,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 634 selfloop transitions, 44 changer transitions 0/686 dead transitions. [2024-06-20 15:22:02,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 686 transitions, 11785 flow [2024-06-20 15:22:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:22:02,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:22:02,842 INFO L175 Difference]: Start difference. First operand has 507 places, 663 transitions, 10259 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:22:02,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 686 transitions, 11785 flow [2024-06-20 15:22:09,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 686 transitions, 11635 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:09,115 INFO L231 Difference]: Finished difference. Result has 508 places, 667 transitions, 10312 flow [2024-06-20 15:22:09,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10109, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10312, PETRI_PLACES=508, PETRI_TRANSITIONS=667} [2024-06-20 15:22:09,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-20 15:22:09,116 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 667 transitions, 10312 flow [2024-06-20 15:22:09,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:09,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:09,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:22:09,117 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)] === [2024-06-20 15:22:09,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 867335051, now seen corresponding path program 11 times [2024-06-20 15:22:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211679983] [2024-06-20 15:22:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:09,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:09,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:09,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211679983] [2024-06-20 15:22:09,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211679983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:09,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255199356] [2024-06-20 15:22:09,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:09,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:09,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:09,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:09,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 667 transitions, 10312 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:09,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:09,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:09,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:10,749 INFO L124 PetriNetUnfolderBase]: 3657/6235 cut-off events. [2024-06-20 15:22:10,749 INFO L125 PetriNetUnfolderBase]: For 1483449/1483449 co-relation queries the response was YES. [2024-06-20 15:22:10,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56114 conditions, 6235 events. 3657/6235 cut-off events. For 1483449/1483449 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 43650 event pairs, 651 based on Foata normal form. 12/6241 useless extension candidates. Maximal degree in co-relation 55887. Up to 5315 conditions per place. [2024-06-20 15:22:10,854 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 633 selfloop transitions, 51 changer transitions 0/692 dead transitions. [2024-06-20 15:22:10,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 692 transitions, 11820 flow [2024-06-20 15:22:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:22:10,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:22:10,855 INFO L175 Difference]: Start difference. First operand has 508 places, 667 transitions, 10312 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:22:10,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 692 transitions, 11820 flow [2024-06-20 15:22:16,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 692 transitions, 11689 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:16,414 INFO L231 Difference]: Finished difference. Result has 510 places, 669 transitions, 10329 flow [2024-06-20 15:22:16,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10329, PETRI_PLACES=510, PETRI_TRANSITIONS=669} [2024-06-20 15:22:16,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-20 15:22:16,415 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 669 transitions, 10329 flow [2024-06-20 15:22:16,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:16,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:16,415 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] [2024-06-20 15:22:16,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:22:16,416 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)] === [2024-06-20 15:22:16,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:16,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1066897403, now seen corresponding path program 6 times [2024-06-20 15:22:16,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:16,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132005406] [2024-06-20 15:22:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:16,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:16,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:16,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132005406] [2024-06-20 15:22:16,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132005406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:16,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:16,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494868786] [2024-06-20 15:22:16,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:16,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:16,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:16,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 669 transitions, 10329 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:16,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:16,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:16,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:18,188 INFO L124 PetriNetUnfolderBase]: 3693/6301 cut-off events. [2024-06-20 15:22:18,188 INFO L125 PetriNetUnfolderBase]: For 1482301/1482301 co-relation queries the response was YES. [2024-06-20 15:22:18,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56685 conditions, 6301 events. 3693/6301 cut-off events. For 1482301/1482301 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 44242 event pairs, 681 based on Foata normal form. 10/6309 useless extension candidates. Maximal degree in co-relation 56457. Up to 5565 conditions per place. [2024-06-20 15:22:18,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 628 selfloop transitions, 55 changer transitions 0/691 dead transitions. [2024-06-20 15:22:18,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 691 transitions, 11839 flow [2024-06-20 15:22:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:22:18,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 15:22:18,293 INFO L175 Difference]: Start difference. First operand has 510 places, 669 transitions, 10329 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:22:18,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 691 transitions, 11839 flow [2024-06-20 15:22:24,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 691 transitions, 11723 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:24,871 INFO L231 Difference]: Finished difference. Result has 513 places, 671 transitions, 10403 flow [2024-06-20 15:22:24,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10213, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10403, PETRI_PLACES=513, PETRI_TRANSITIONS=671} [2024-06-20 15:22:24,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-20 15:22:24,872 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 671 transitions, 10403 flow [2024-06-20 15:22:24,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:24,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:24,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:24,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:22:24,873 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)] === [2024-06-20 15:22:24,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:24,873 INFO L85 PathProgramCache]: Analyzing trace with hash 657853893, now seen corresponding path program 12 times [2024-06-20 15:22:24,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:24,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913845645] [2024-06-20 15:22:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:24,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:25,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:25,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913845645] [2024-06-20 15:22:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913845645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:25,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:25,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:25,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904621992] [2024-06-20 15:22:25,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:25,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:25,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:25,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:25,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 671 transitions, 10403 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:25,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:25,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:25,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:26,724 INFO L124 PetriNetUnfolderBase]: 3760/6405 cut-off events. [2024-06-20 15:22:26,724 INFO L125 PetriNetUnfolderBase]: For 1619822/1619822 co-relation queries the response was YES. [2024-06-20 15:22:26,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57485 conditions, 6405 events. 3760/6405 cut-off events. For 1619822/1619822 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 45002 event pairs, 681 based on Foata normal form. 22/6425 useless extension candidates. Maximal degree in co-relation 57256. Up to 5465 conditions per place. [2024-06-20 15:22:26,835 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 603 selfloop transitions, 98 changer transitions 0/709 dead transitions. [2024-06-20 15:22:26,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 709 transitions, 12040 flow [2024-06-20 15:22:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:22:26,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-20 15:22:26,837 INFO L175 Difference]: Start difference. First operand has 513 places, 671 transitions, 10403 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:22:26,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 709 transitions, 12040 flow [2024-06-20 15:22:33,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 709 transitions, 11876 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:33,376 INFO L231 Difference]: Finished difference. Result has 514 places, 675 transitions, 10589 flow [2024-06-20 15:22:33,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10239, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10589, PETRI_PLACES=514, PETRI_TRANSITIONS=675} [2024-06-20 15:22:33,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-20 15:22:33,376 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 675 transitions, 10589 flow [2024-06-20 15:22:33,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:33,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:33,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:22:33,377 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)] === [2024-06-20 15:22:33,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1015775733, now seen corresponding path program 13 times [2024-06-20 15:22:33,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553213206] [2024-06-20 15:22:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:33,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553213206] [2024-06-20 15:22:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553213206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:33,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:33,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074978327] [2024-06-20 15:22:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:33,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:33,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:33,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 675 transitions, 10589 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:33,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:33,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:35,232 INFO L124 PetriNetUnfolderBase]: 3715/6357 cut-off events. [2024-06-20 15:22:35,232 INFO L125 PetriNetUnfolderBase]: For 1407414/1407414 co-relation queries the response was YES. [2024-06-20 15:22:35,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54141 conditions, 6357 events. 3715/6357 cut-off events. For 1407414/1407414 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 44872 event pairs, 516 based on Foata normal form. 22/6377 useless extension candidates. Maximal degree in co-relation 53911. Up to 4719 conditions per place. [2024-06-20 15:22:35,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 589 selfloop transitions, 119 changer transitions 0/716 dead transitions. [2024-06-20 15:22:35,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 716 transitions, 12523 flow [2024-06-20 15:22:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:22:35,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-20 15:22:35,339 INFO L175 Difference]: Start difference. First operand has 514 places, 675 transitions, 10589 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:22:35,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 716 transitions, 12523 flow [2024-06-20 15:22:40,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 716 transitions, 12274 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:40,994 INFO L231 Difference]: Finished difference. Result has 516 places, 677 transitions, 10671 flow [2024-06-20 15:22:40,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10342, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10671, PETRI_PLACES=516, PETRI_TRANSITIONS=677} [2024-06-20 15:22:40,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-20 15:22:40,995 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 677 transitions, 10671 flow [2024-06-20 15:22:40,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:40,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:40,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:40,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:22:40,996 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)] === [2024-06-20 15:22:40,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash -387746783, now seen corresponding path program 7 times [2024-06-20 15:22:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:40,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444558021] [2024-06-20 15:22:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:41,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:41,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444558021] [2024-06-20 15:22:41,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444558021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:41,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:41,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12439940] [2024-06-20 15:22:41,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:41,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:41,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 677 transitions, 10671 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:41,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:41,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:41,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:42,837 INFO L124 PetriNetUnfolderBase]: 3723/6362 cut-off events. [2024-06-20 15:22:42,838 INFO L125 PetriNetUnfolderBase]: For 1185026/1185029 co-relation queries the response was YES. [2024-06-20 15:22:42,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54382 conditions, 6362 events. 3723/6362 cut-off events. For 1185026/1185029 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 44848 event pairs, 682 based on Foata normal form. 4/6363 useless extension candidates. Maximal degree in co-relation 54151. Up to 5497 conditions per place. [2024-06-20 15:22:42,942 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 567 selfloop transitions, 126 changer transitions 0/701 dead transitions. [2024-06-20 15:22:42,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 701 transitions, 12185 flow [2024-06-20 15:22:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:22:42,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:22:42,943 INFO L175 Difference]: Start difference. First operand has 516 places, 677 transitions, 10671 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:22:42,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 701 transitions, 12185 flow [2024-06-20 15:22:48,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 701 transitions, 11982 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:48,195 INFO L231 Difference]: Finished difference. Result has 519 places, 679 transitions, 10803 flow [2024-06-20 15:22:48,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10468, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10803, PETRI_PLACES=519, PETRI_TRANSITIONS=679} [2024-06-20 15:22:48,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-20 15:22:48,196 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 679 transitions, 10803 flow [2024-06-20 15:22:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:48,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:48,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:22:48,196 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)] === [2024-06-20 15:22:48,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash 401538081, now seen corresponding path program 8 times [2024-06-20 15:22:48,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:48,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108730957] [2024-06-20 15:22:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:48,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:48,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108730957] [2024-06-20 15:22:48,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108730957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:48,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:48,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:48,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115470404] [2024-06-20 15:22:48,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:48,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:48,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:48,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 679 transitions, 10803 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:48,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:48,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:48,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:50,147 INFO L124 PetriNetUnfolderBase]: 3759/6417 cut-off events. [2024-06-20 15:22:50,147 INFO L125 PetriNetUnfolderBase]: For 1277747/1277747 co-relation queries the response was YES. [2024-06-20 15:22:50,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54648 conditions, 6417 events. 3759/6417 cut-off events. For 1277747/1277747 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 45311 event pairs, 679 based on Foata normal form. 10/6425 useless extension candidates. Maximal degree in co-relation 54416. Up to 5483 conditions per place. [2024-06-20 15:22:50,254 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 127 changer transitions 0/713 dead transitions. [2024-06-20 15:22:50,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 713 transitions, 12397 flow [2024-06-20 15:22:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 15:22:50,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-20 15:22:50,255 INFO L175 Difference]: Start difference. First operand has 519 places, 679 transitions, 10803 flow. Second operand 9 states and 224 transitions. [2024-06-20 15:22:50,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 713 transitions, 12397 flow [2024-06-20 15:22:55,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 713 transitions, 12078 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:55,781 INFO L231 Difference]: Finished difference. Result has 522 places, 681 transitions, 10830 flow [2024-06-20 15:22:55,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10484, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10830, PETRI_PLACES=522, PETRI_TRANSITIONS=681} [2024-06-20 15:22:55,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-20 15:22:55,782 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 681 transitions, 10830 flow [2024-06-20 15:22:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:55,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:55,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:55,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:22:55,783 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)] === [2024-06-20 15:22:55,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:55,783 INFO L85 PathProgramCache]: Analyzing trace with hash -31032287, now seen corresponding path program 9 times [2024-06-20 15:22:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:55,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808061702] [2024-06-20 15:22:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:55,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:55,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:55,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808061702] [2024-06-20 15:22:55,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808061702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:55,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:55,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655628302] [2024-06-20 15:22:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:55,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:55,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:55,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 681 transitions, 10830 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:55,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:55,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:55,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:57,564 INFO L124 PetriNetUnfolderBase]: 3747/6396 cut-off events. [2024-06-20 15:22:57,564 INFO L125 PetriNetUnfolderBase]: For 1176495/1176498 co-relation queries the response was YES. [2024-06-20 15:22:57,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54293 conditions, 6396 events. 3747/6396 cut-off events. For 1176495/1176498 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 45129 event pairs, 684 based on Foata normal form. 4/6397 useless extension candidates. Maximal degree in co-relation 54060. Up to 5584 conditions per place. [2024-06-20 15:22:57,673 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 609 selfloop transitions, 88 changer transitions 0/705 dead transitions. [2024-06-20 15:22:57,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 705 transitions, 12284 flow [2024-06-20 15:22:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:22:57,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:22:57,674 INFO L175 Difference]: Start difference. First operand has 522 places, 681 transitions, 10830 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:22:57,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 705 transitions, 12284 flow [2024-06-20 15:23:03,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 705 transitions, 11966 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:03,451 INFO L231 Difference]: Finished difference. Result has 522 places, 681 transitions, 10693 flow [2024-06-20 15:23:03,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10512, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10693, PETRI_PLACES=522, PETRI_TRANSITIONS=681} [2024-06-20 15:23:03,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-20 15:23:03,451 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 681 transitions, 10693 flow [2024-06-20 15:23:03,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:03,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:03,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:03,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 15:23:03,452 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)] === [2024-06-20 15:23:03,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1248108581, now seen corresponding path program 10 times [2024-06-20 15:23:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531801184] [2024-06-20 15:23:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:03,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:03,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531801184] [2024-06-20 15:23:03,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531801184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:03,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:03,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:03,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248959186] [2024-06-20 15:23:03,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:03,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:03,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:03,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:03,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 681 transitions, 10693 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:03,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:03,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:05,213 INFO L124 PetriNetUnfolderBase]: 3755/6399 cut-off events. [2024-06-20 15:23:05,213 INFO L125 PetriNetUnfolderBase]: For 1172880/1172883 co-relation queries the response was YES. [2024-06-20 15:23:05,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53877 conditions, 6399 events. 3755/6399 cut-off events. For 1172880/1172883 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45117 event pairs, 667 based on Foata normal form. 4/6400 useless extension candidates. Maximal degree in co-relation 53643. Up to 5438 conditions per place. [2024-06-20 15:23:05,319 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 603 selfloop transitions, 101 changer transitions 0/712 dead transitions. [2024-06-20 15:23:05,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 712 transitions, 12267 flow [2024-06-20 15:23:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:23:05,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:23:05,321 INFO L175 Difference]: Start difference. First operand has 522 places, 681 transitions, 10693 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:23:05,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 712 transitions, 12267 flow [2024-06-20 15:23:11,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 712 transitions, 11935 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:11,374 INFO L231 Difference]: Finished difference. Result has 523 places, 684 transitions, 10671 flow [2024-06-20 15:23:11,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10361, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10671, PETRI_PLACES=523, PETRI_TRANSITIONS=684} [2024-06-20 15:23:11,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-20 15:23:11,375 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 684 transitions, 10671 flow [2024-06-20 15:23:11,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:11,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:11,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 15:23:11,376 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)] === [2024-06-20 15:23:11,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash -623922143, now seen corresponding path program 11 times [2024-06-20 15:23:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:11,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232055508] [2024-06-20 15:23:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:11,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:11,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:11,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232055508] [2024-06-20 15:23:11,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232055508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:11,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:11,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856316623] [2024-06-20 15:23:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:11,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:11,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:11,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:11,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 684 transitions, 10671 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:11,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:11,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:13,252 INFO L124 PetriNetUnfolderBase]: 3763/6424 cut-off events. [2024-06-20 15:23:13,253 INFO L125 PetriNetUnfolderBase]: For 1184948/1184951 co-relation queries the response was YES. [2024-06-20 15:23:13,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54149 conditions, 6424 events. 3763/6424 cut-off events. For 1184948/1184951 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45414 event pairs, 686 based on Foata normal form. 4/6425 useless extension candidates. Maximal degree in co-relation 53913. Up to 5557 conditions per place. [2024-06-20 15:23:13,374 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 577 selfloop transitions, 126 changer transitions 0/711 dead transitions. [2024-06-20 15:23:13,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 711 transitions, 12217 flow [2024-06-20 15:23:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:23:13,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:23:13,375 INFO L175 Difference]: Start difference. First operand has 523 places, 684 transitions, 10671 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:23:13,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 711 transitions, 12217 flow [2024-06-20 15:23:19,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 711 transitions, 12001 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:19,863 INFO L231 Difference]: Finished difference. Result has 527 places, 686 transitions, 10794 flow [2024-06-20 15:23:19,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10794, PETRI_PLACES=527, PETRI_TRANSITIONS=686} [2024-06-20 15:23:19,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-20 15:23:19,864 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 686 transitions, 10794 flow [2024-06-20 15:23:19,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:19,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:19,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:19,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 15:23:19,864 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)] === [2024-06-20 15:23:19,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:19,865 INFO L85 PathProgramCache]: Analyzing trace with hash -387450113, now seen corresponding path program 12 times [2024-06-20 15:23:19,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:19,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291228645] [2024-06-20 15:23:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:19,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:19,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:19,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291228645] [2024-06-20 15:23:19,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291228645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:19,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:19,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240226403] [2024-06-20 15:23:19,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:19,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:19,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:19,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:19,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:20,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:20,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 686 transitions, 10794 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:20,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:20,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:20,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:21,719 INFO L124 PetriNetUnfolderBase]: 3758/6415 cut-off events. [2024-06-20 15:23:21,719 INFO L125 PetriNetUnfolderBase]: For 1176067/1176070 co-relation queries the response was YES. [2024-06-20 15:23:21,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53838 conditions, 6415 events. 3758/6415 cut-off events. For 1176067/1176070 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45327 event pairs, 681 based on Foata normal form. 4/6416 useless extension candidates. Maximal degree in co-relation 53601. Up to 5454 conditions per place. [2024-06-20 15:23:22,035 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 573 selfloop transitions, 135 changer transitions 0/716 dead transitions. [2024-06-20 15:23:22,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 716 transitions, 12434 flow [2024-06-20 15:23:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:23:22,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:23:22,036 INFO L175 Difference]: Start difference. First operand has 527 places, 686 transitions, 10794 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:23:22,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 716 transitions, 12434 flow [2024-06-20 15:23:28,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 716 transitions, 12111 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:28,268 INFO L231 Difference]: Finished difference. Result has 530 places, 690 transitions, 10903 flow [2024-06-20 15:23:28,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10471, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10903, PETRI_PLACES=530, PETRI_TRANSITIONS=690} [2024-06-20 15:23:28,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-20 15:23:28,268 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 690 transitions, 10903 flow [2024-06-20 15:23:28,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:28,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:28,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:28,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 15:23:28,269 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)] === [2024-06-20 15:23:28,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1108562069, now seen corresponding path program 13 times [2024-06-20 15:23:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:28,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424872466] [2024-06-20 15:23:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:28,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:28,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424872466] [2024-06-20 15:23:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424872466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:28,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880319600] [2024-06-20 15:23:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:28,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:28,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 690 transitions, 10903 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:28,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:28,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:28,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:30,037 INFO L124 PetriNetUnfolderBase]: 3753/6407 cut-off events. [2024-06-20 15:23:30,037 INFO L125 PetriNetUnfolderBase]: For 1191344/1191347 co-relation queries the response was YES. [2024-06-20 15:23:30,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53068 conditions, 6407 events. 3753/6407 cut-off events. For 1191344/1191347 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 45264 event pairs, 536 based on Foata normal form. 10/6414 useless extension candidates. Maximal degree in co-relation 52829. Up to 4637 conditions per place. [2024-06-20 15:23:30,154 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 604 selfloop transitions, 111 changer transitions 0/723 dead transitions. [2024-06-20 15:23:30,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 723 transitions, 12822 flow [2024-06-20 15:23:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:23:30,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-20 15:23:30,155 INFO L175 Difference]: Start difference. First operand has 530 places, 690 transitions, 10903 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:23:30,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 723 transitions, 12822 flow [2024-06-20 15:23:36,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 723 transitions, 12553 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:36,359 INFO L231 Difference]: Finished difference. Result has 533 places, 692 transitions, 10913 flow [2024-06-20 15:23:36,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10913, PETRI_PLACES=533, PETRI_TRANSITIONS=692} [2024-06-20 15:23:36,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-20 15:23:36,360 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 692 transitions, 10913 flow [2024-06-20 15:23:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:36,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 15:23:36,361 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)] === [2024-06-20 15:23:36,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash 454559773, now seen corresponding path program 14 times [2024-06-20 15:23:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:36,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281529387] [2024-06-20 15:23:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281529387] [2024-06-20 15:23:36,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281529387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:36,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:36,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:36,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660601834] [2024-06-20 15:23:36,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:36,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:36,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:36,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:36,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 692 transitions, 10913 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:36,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:36,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:36,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:38,274 INFO L124 PetriNetUnfolderBase]: 3741/6398 cut-off events. [2024-06-20 15:23:38,275 INFO L125 PetriNetUnfolderBase]: For 1107929/1107932 co-relation queries the response was YES. [2024-06-20 15:23:38,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53035 conditions, 6398 events. 3741/6398 cut-off events. For 1107929/1107932 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 45302 event pairs, 487 based on Foata normal form. 4/6399 useless extension candidates. Maximal degree in co-relation 52794. Up to 4629 conditions per place. [2024-06-20 15:23:38,380 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 591 selfloop transitions, 125 changer transitions 0/724 dead transitions. [2024-06-20 15:23:38,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 724 transitions, 12477 flow [2024-06-20 15:23:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 15:23:38,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515679442508711 [2024-06-20 15:23:38,381 INFO L175 Difference]: Start difference. First operand has 533 places, 692 transitions, 10913 flow. Second operand 7 states and 187 transitions. [2024-06-20 15:23:38,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 724 transitions, 12477 flow [2024-06-20 15:23:43,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 724 transitions, 12222 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:43,963 INFO L231 Difference]: Finished difference. Result has 536 places, 692 transitions, 10913 flow [2024-06-20 15:23:43,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10913, PETRI_PLACES=536, PETRI_TRANSITIONS=692} [2024-06-20 15:23:43,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 494 predicate places. [2024-06-20 15:23:43,964 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 692 transitions, 10913 flow [2024-06-20 15:23:43,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:43,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:43,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:43,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 15:23:43,965 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)] === [2024-06-20 15:23:43,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1750105389, now seen corresponding path program 1 times [2024-06-20 15:23:43,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:43,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68790922] [2024-06-20 15:23:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:43,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68790922] [2024-06-20 15:23:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68790922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:44,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:44,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:44,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668875085] [2024-06-20 15:23:44,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:44,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:44,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:44,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 692 transitions, 10913 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:44,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:44,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:44,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:45,981 INFO L124 PetriNetUnfolderBase]: 3775/6437 cut-off events. [2024-06-20 15:23:45,981 INFO L125 PetriNetUnfolderBase]: For 1172906/1172906 co-relation queries the response was YES. [2024-06-20 15:23:46,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54333 conditions, 6437 events. 3775/6437 cut-off events. For 1172906/1172906 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 45488 event pairs, 563 based on Foata normal form. 2/6437 useless extension candidates. Maximal degree in co-relation 54091. Up to 5585 conditions per place. [2024-06-20 15:23:46,095 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 672 selfloop transitions, 57 changer transitions 0/737 dead transitions. [2024-06-20 15:23:46,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 737 transitions, 13291 flow [2024-06-20 15:23:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 15:23:46,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:23:46,096 INFO L175 Difference]: Start difference. First operand has 536 places, 692 transitions, 10913 flow. Second operand 9 states and 222 transitions. [2024-06-20 15:23:46,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 737 transitions, 13291 flow [2024-06-20 15:23:52,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 737 transitions, 12995 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:52,307 INFO L231 Difference]: Finished difference. Result has 538 places, 698 transitions, 10932 flow [2024-06-20 15:23:52,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10617, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10932, PETRI_PLACES=538, PETRI_TRANSITIONS=698} [2024-06-20 15:23:52,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-20 15:23:52,307 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 698 transitions, 10932 flow [2024-06-20 15:23:52,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:52,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:52,308 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] [2024-06-20 15:23:52,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 15:23:52,308 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)] === [2024-06-20 15:23:52,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1744391469, now seen corresponding path program 2 times [2024-06-20 15:23:52,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:52,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658513203] [2024-06-20 15:23:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658513203] [2024-06-20 15:23:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658513203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:52,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:52,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847787436] [2024-06-20 15:23:52,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:52,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:52,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:52,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:52,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 698 transitions, 10932 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:52,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:52,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:52,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:54,285 INFO L124 PetriNetUnfolderBase]: 3796/6468 cut-off events. [2024-06-20 15:23:54,286 INFO L125 PetriNetUnfolderBase]: For 1210876/1210876 co-relation queries the response was YES. [2024-06-20 15:23:54,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54577 conditions, 6468 events. 3796/6468 cut-off events. For 1210876/1210876 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 45683 event pairs, 567 based on Foata normal form. 2/6468 useless extension candidates. Maximal degree in co-relation 54335. Up to 5605 conditions per place. [2024-06-20 15:23:54,394 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 671 selfloop transitions, 59 changer transitions 0/738 dead transitions. [2024-06-20 15:23:54,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 738 transitions, 13252 flow [2024-06-20 15:23:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:23:54,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:23:54,395 INFO L175 Difference]: Start difference. First operand has 538 places, 698 transitions, 10932 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:23:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 738 transitions, 13252 flow [2024-06-20 15:24:01,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 738 transitions, 13034 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-20 15:24:01,133 INFO L231 Difference]: Finished difference. Result has 543 places, 702 transitions, 10973 flow [2024-06-20 15:24:01,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10768, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10973, PETRI_PLACES=543, PETRI_TRANSITIONS=702} [2024-06-20 15:24:01,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 501 predicate places. [2024-06-20 15:24:01,134 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 702 transitions, 10973 flow [2024-06-20 15:24:01,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:01,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:01,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:01,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-20 15:24:01,135 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)] === [2024-06-20 15:24:01,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash 846142627, now seen corresponding path program 3 times [2024-06-20 15:24:01,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:01,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76031949] [2024-06-20 15:24:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:01,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76031949] [2024-06-20 15:24:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76031949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:01,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:01,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608814003] [2024-06-20 15:24:01,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:01,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:01,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:01,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 702 transitions, 10973 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:01,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:01,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:01,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:03,015 INFO L124 PetriNetUnfolderBase]: 3791/6456 cut-off events. [2024-06-20 15:24:03,016 INFO L125 PetriNetUnfolderBase]: For 1196299/1196299 co-relation queries the response was YES. [2024-06-20 15:24:03,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54028 conditions, 6456 events. 3791/6456 cut-off events. For 1196299/1196299 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 45590 event pairs, 667 based on Foata normal form. 2/6451 useless extension candidates. Maximal degree in co-relation 53784. Up to 5715 conditions per place. [2024-06-20 15:24:03,126 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 45 changer transitions 0/735 dead transitions. [2024-06-20 15:24:03,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 735 transitions, 12829 flow [2024-06-20 15:24:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:24:03,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:24:03,128 INFO L175 Difference]: Start difference. First operand has 543 places, 702 transitions, 10973 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:24:03,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 735 transitions, 12829 flow [2024-06-20 15:24:09,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 735 transitions, 12680 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:09,826 INFO L231 Difference]: Finished difference. Result has 546 places, 702 transitions, 10919 flow [2024-06-20 15:24:09,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10919, PETRI_PLACES=546, PETRI_TRANSITIONS=702} [2024-06-20 15:24:09,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-20 15:24:09,827 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 702 transitions, 10919 flow [2024-06-20 15:24:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:09,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:09,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-20 15:24:09,829 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)] === [2024-06-20 15:24:09,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1914592077, now seen corresponding path program 4 times [2024-06-20 15:24:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824355123] [2024-06-20 15:24:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:09,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:09,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824355123] [2024-06-20 15:24:09,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824355123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:09,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:09,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:09,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876015141] [2024-06-20 15:24:09,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:09,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:10,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:10,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 702 transitions, 10919 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:10,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:10,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:10,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:11,681 INFO L124 PetriNetUnfolderBase]: 3799/6473 cut-off events. [2024-06-20 15:24:11,682 INFO L125 PetriNetUnfolderBase]: For 1210346/1210346 co-relation queries the response was YES. [2024-06-20 15:24:11,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54085 conditions, 6473 events. 3799/6473 cut-off events. For 1210346/1210346 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 45772 event pairs, 674 based on Foata normal form. 2/6473 useless extension candidates. Maximal degree in co-relation 53840. Up to 5762 conditions per place. [2024-06-20 15:24:11,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 42 changer transitions 0/732 dead transitions. [2024-06-20 15:24:11,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 732 transitions, 12485 flow [2024-06-20 15:24:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:24:11,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:24:11,794 INFO L175 Difference]: Start difference. First operand has 546 places, 702 transitions, 10919 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:24:11,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 732 transitions, 12485 flow [2024-06-20 15:24:18,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 732 transitions, 12340 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:18,559 INFO L231 Difference]: Finished difference. Result has 546 places, 704 transitions, 10915 flow [2024-06-20 15:24:18,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10780, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10915, PETRI_PLACES=546, PETRI_TRANSITIONS=704} [2024-06-20 15:24:18,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-20 15:24:18,560 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 704 transitions, 10915 flow [2024-06-20 15:24:18,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:18,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:18,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:18,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-20 15:24:18,561 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)] === [2024-06-20 15:24:18,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2094853421, now seen corresponding path program 5 times [2024-06-20 15:24:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:18,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793530961] [2024-06-20 15:24:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:18,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:18,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793530961] [2024-06-20 15:24:18,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793530961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:18,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:18,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102959743] [2024-06-20 15:24:18,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:18,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:18,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:18,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 704 transitions, 10915 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:18,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:18,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:18,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:20,390 INFO L124 PetriNetUnfolderBase]: 3807/6485 cut-off events. [2024-06-20 15:24:20,390 INFO L125 PetriNetUnfolderBase]: For 1225009/1225009 co-relation queries the response was YES. [2024-06-20 15:24:20,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54146 conditions, 6485 events. 3807/6485 cut-off events. For 1225009/1225009 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 45843 event pairs, 674 based on Foata normal form. 2/6485 useless extension candidates. Maximal degree in co-relation 53901. Up to 5774 conditions per place. [2024-06-20 15:24:20,742 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 685 selfloop transitions, 43 changer transitions 0/736 dead transitions. [2024-06-20 15:24:20,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 736 transitions, 12491 flow [2024-06-20 15:24:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:24:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:24:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:24:20,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:24:20,743 INFO L175 Difference]: Start difference. First operand has 546 places, 704 transitions, 10915 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:24:20,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 736 transitions, 12491 flow [2024-06-20 15:24:26,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 736 transitions, 12378 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:26,458 INFO L231 Difference]: Finished difference. Result has 550 places, 706 transitions, 10943 flow [2024-06-20 15:24:26,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10802, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10943, PETRI_PLACES=550, PETRI_TRANSITIONS=706} [2024-06-20 15:24:26,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-20 15:24:26,459 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 706 transitions, 10943 flow [2024-06-20 15:24:26,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:26,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:26,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:26,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-20 15:24:26,459 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)] === [2024-06-20 15:24:26,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1514702859, now seen corresponding path program 6 times [2024-06-20 15:24:26,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:26,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401316766] [2024-06-20 15:24:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:26,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:26,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401316766] [2024-06-20 15:24:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401316766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:26,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:26,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:26,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84719826] [2024-06-20 15:24:26,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:26,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:26,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:26,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 706 transitions, 10943 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:26,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:26,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:26,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:28,472 INFO L124 PetriNetUnfolderBase]: 3815/6495 cut-off events. [2024-06-20 15:24:28,473 INFO L125 PetriNetUnfolderBase]: For 1239204/1239204 co-relation queries the response was YES. [2024-06-20 15:24:28,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54287 conditions, 6495 events. 3815/6495 cut-off events. For 1239204/1239204 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 45839 event pairs, 672 based on Foata normal form. 2/6493 useless extension candidates. Maximal degree in co-relation 54041. Up to 5766 conditions per place. [2024-06-20 15:24:28,587 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 682 selfloop transitions, 49 changer transitions 0/739 dead transitions. [2024-06-20 15:24:28,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 739 transitions, 12523 flow [2024-06-20 15:24:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:24:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:24:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:24:28,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:24:28,589 INFO L175 Difference]: Start difference. First operand has 550 places, 706 transitions, 10943 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:24:28,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 739 transitions, 12523 flow [2024-06-20 15:24:34,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 739 transitions, 12404 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:34,481 INFO L231 Difference]: Finished difference. Result has 552 places, 708 transitions, 10973 flow [2024-06-20 15:24:34,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10973, PETRI_PLACES=552, PETRI_TRANSITIONS=708} [2024-06-20 15:24:34,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-20 15:24:34,482 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 708 transitions, 10973 flow [2024-06-20 15:24:34,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:34,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:34,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:34,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-20 15:24:34,483 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)] === [2024-06-20 15:24:34,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1982324620, now seen corresponding path program 1 times [2024-06-20 15:24:34,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:34,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336034522] [2024-06-20 15:24:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:34,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:34,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336034522] [2024-06-20 15:24:34,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336034522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:34,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:34,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:34,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042848281] [2024-06-20 15:24:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:34,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:34,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:34,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:34,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 708 transitions, 10973 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:34,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:36,450 INFO L124 PetriNetUnfolderBase]: 3836/6522 cut-off events. [2024-06-20 15:24:36,450 INFO L125 PetriNetUnfolderBase]: For 1268051/1268051 co-relation queries the response was YES. [2024-06-20 15:24:36,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54936 conditions, 6522 events. 3836/6522 cut-off events. For 1268051/1268051 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 46150 event pairs, 704 based on Foata normal form. 1/6515 useless extension candidates. Maximal degree in co-relation 54689. Up to 5431 conditions per place. [2024-06-20 15:24:36,564 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 459 selfloop transitions, 268 changer transitions 0/735 dead transitions. [2024-06-20 15:24:36,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 735 transitions, 12978 flow [2024-06-20 15:24:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:24:36,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:24:36,566 INFO L175 Difference]: Start difference. First operand has 552 places, 708 transitions, 10973 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:24:36,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 735 transitions, 12978 flow [2024-06-20 15:24:43,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 735 transitions, 12851 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:43,655 INFO L231 Difference]: Finished difference. Result has 552 places, 717 transitions, 11714 flow [2024-06-20 15:24:43,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10846, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11714, PETRI_PLACES=552, PETRI_TRANSITIONS=717} [2024-06-20 15:24:43,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-20 15:24:43,656 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 717 transitions, 11714 flow [2024-06-20 15:24:43,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:43,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:43,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:43,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-20 15:24:43,656 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)] === [2024-06-20 15:24:43,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash 465573038, now seen corresponding path program 2 times [2024-06-20 15:24:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:43,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446433375] [2024-06-20 15:24:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:43,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:43,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446433375] [2024-06-20 15:24:43,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446433375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:43,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:43,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:24:43,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541161536] [2024-06-20 15:24:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:43,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:24:43,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:24:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:24:43,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:43,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 717 transitions, 11714 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:43,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:43,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:43,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:45,572 INFO L124 PetriNetUnfolderBase]: 3849/6554 cut-off events. [2024-06-20 15:24:45,572 INFO L125 PetriNetUnfolderBase]: For 1298137/1298137 co-relation queries the response was YES. [2024-06-20 15:24:45,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56120 conditions, 6554 events. 3849/6554 cut-off events. For 1298137/1298137 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 46438 event pairs, 676 based on Foata normal form. 1/6553 useless extension candidates. Maximal degree in co-relation 55871. Up to 5769 conditions per place. [2024-06-20 15:24:45,686 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 645 selfloop transitions, 99 changer transitions 0/752 dead transitions. [2024-06-20 15:24:45,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 752 transitions, 13736 flow [2024-06-20 15:24:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:24:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:24:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 15:24:45,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-20 15:24:45,688 INFO L175 Difference]: Start difference. First operand has 552 places, 717 transitions, 11714 flow. Second operand 9 states and 218 transitions. [2024-06-20 15:24:45,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 752 transitions, 13736 flow