./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_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/safe004_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe004_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_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-bcb38a6-m [2024-06-04 14:06:20,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:06:20,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:06:20,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:06:20,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:06:20,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:06:20,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:06:20,809 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:06:20,810 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:06:20,813 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:06:20,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:06:20,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:06:20,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:06:20,815 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:06:20,815 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:06:20,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:06:20,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:06:20,816 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:06:20,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:06:20,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:06:20,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:06:20,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:06:20,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:06:20,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:06:20,818 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:06:20,818 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:06:20,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:06:20,818 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:06:20,819 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:06:20,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:06:20,820 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:06:20,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:06:20,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:06:20,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:06:20,821 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:06:20,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:06:20,821 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:06:20,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:06:20,821 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:06:20,822 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:06:20,822 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:06:20,822 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:06:20,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:06:20,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:06:21,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:06:21,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:06:21,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:06:21,072 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:06:21,073 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:06:21,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_tso.yml/witness.yml [2024-06-04 14:06:21,197 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:06:21,197 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:06:21,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-04 14:06:22,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:06:22,394 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:06:22,394 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-04 14:06:22,411 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b2f8754f/534062c6d6e74a5eb5f5f11caf93a1ca/FLAG21c83971d [2024-06-04 14:06:22,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b2f8754f/534062c6d6e74a5eb5f5f11caf93a1ca [2024-06-04 14:06:22,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:06:22,437 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:06:22,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:06:22,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:06:22,447 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:06:22,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:06:21" (1/2) ... [2024-06-04 14:06:22,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a9d29a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:22, skipping insertion in model container [2024-06-04 14:06:22,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:06:21" (1/2) ... [2024-06-04 14:06:22,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f70b432 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:22, skipping insertion in model container [2024-06-04 14:06:22,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:06:22" (2/2) ... [2024-06-04 14:06:22,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a9d29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:22, skipping insertion in model container [2024-06-04 14:06:22,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:06:22" (2/2) ... [2024-06-04 14:06:22,452 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:06:22,508 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:06:22,509 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 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)))) && (! 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 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 14:06:22,514 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 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)))) && (! 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 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 14:06:22,514 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 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)))) && (! 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 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 14:06:22,514 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:06:22,514 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-04 14:06:22,543 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:06:22,820 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:06:22,830 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:06:22,978 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:06:23,018 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:06:23,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23 WrapperNode [2024-06-04 14:06:23,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:06:23,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:06:23,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:06:23,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:06:23,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,075 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-04 14:06:23,077 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:06:23,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:06:23,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:06:23,078 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:06:23,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,100 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,116 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]. [2024-06-04 14:06:23,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,123 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:06:23,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:06:23,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:06:23,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:06:23,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (1/1) ... [2024-06-04 14:06:23,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:06:23,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:06:23,194 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) [2024-06-04 14:06:23,202 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 [2024-06-04 14:06:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:06:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:06:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:06:23,233 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:06:23,233 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:06:23,233 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:06:23,234 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:06:23,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:06:23,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:06:23,235 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:06:23,326 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:06:23,328 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:06:23,511 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:06:23,511 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:06:23,582 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:06:23,583 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:06:23,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:06:23 BoogieIcfgContainer [2024-06-04 14:06:23,583 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:06:23,585 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:06:23,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:06:23,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:06:23,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:06:21" (1/4) ... [2024-06-04 14:06:23,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a2da68 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:06:23, skipping insertion in model container [2024-06-04 14:06:23,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:06:22" (2/4) ... [2024-06-04 14:06:23,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a2da68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:06:23, skipping insertion in model container [2024-06-04 14:06:23,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:23" (3/4) ... [2024-06-04 14:06:23,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a2da68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:06:23, skipping insertion in model container [2024-06-04 14:06:23,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:06:23" (4/4) ... [2024-06-04 14:06:23,589 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-06-04 14:06:23,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:06:23,602 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:06:23,602 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:06:23,653 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:06:23,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 14:06:23,702 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 14:06:23,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:06:23,704 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 4. Compared 61 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. [2024-06-04 14:06:23,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 14:06:23,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 14:06:23,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:06:23,723 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;@4aa155c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:06:23,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:06:23,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:06:23,734 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:06:23,734 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:06:23,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:23,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:06:23,735 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)] === [2024-06-04 14:06:23,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1793314465, now seen corresponding path program 1 times [2024-06-04 14:06:23,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:23,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544564574] [2024-06-04 14:06:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:23,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:24,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544564574] [2024-06-04 14:06:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544564574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:24,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:24,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:06:24,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397256571] [2024-06-04 14:06:24,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:24,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:06:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:06:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:06:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 14:06:24,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:24,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:24,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 14:06:24,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:24,502 INFO L124 PetriNetUnfolderBase]: 606/995 cut-off events. [2024-06-04 14:06:24,502 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-04 14:06:24,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 995 events. 606/995 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4997 event pairs, 384 based on Foata normal form. 1/944 useless extension candidates. Maximal degree in co-relation 1998. Up to 941 conditions per place. [2024-06-04 14:06:24,514 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 14:06:24,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-04 14:06:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:06:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:06:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-04 14:06:24,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-04 14:06:24,525 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-04 14:06:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-04 14:06:24,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:24,530 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 14:06:24,531 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} [2024-06-04 14:06:24,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 14:06:24,534 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 14:06:24,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:24,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:24,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:24,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:06:24,535 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)] === [2024-06-04 14:06:24,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1093279874, now seen corresponding path program 1 times [2024-06-04 14:06:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:24,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800962576] [2024-06-04 14:06:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:24,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800962576] [2024-06-04 14:06:24,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800962576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:24,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:24,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:06:24,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664736387] [2024-06-04 14:06:24,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:24,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:06:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:06:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:06:24,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:24,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:24,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:24,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:24,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:24,881 INFO L124 PetriNetUnfolderBase]: 934/1510 cut-off events. [2024-06-04 14:06:24,881 INFO L125 PetriNetUnfolderBase]: For 300/348 co-relation queries the response was YES. [2024-06-04 14:06:24,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 1510 events. 934/1510 cut-off events. For 300/348 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7433 event pairs, 530 based on Foata normal form. 3/1483 useless extension candidates. Maximal degree in co-relation 3413. Up to 1399 conditions per place. [2024-06-04 14:06:24,889 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:06:24,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 254 flow [2024-06-04 14:06:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 14:06:24,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-04 14:06:24,891 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-04 14:06:24,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 254 flow [2024-06-04 14:06:24,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:24,893 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-04 14:06:24,893 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} [2024-06-04 14:06:24,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 14:06:24,894 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-04 14:06:24,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:24,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:24,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:24,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:06:24,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:24,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:24,895 INFO L85 PathProgramCache]: Analyzing trace with hash 468063438, now seen corresponding path program 1 times [2024-06-04 14:06:24,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:24,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748642949] [2024-06-04 14:06:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:25,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:25,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748642949] [2024-06-04 14:06:25,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748642949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:25,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:25,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:25,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742847289] [2024-06-04 14:06:25,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:25,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:25,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:25,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:25,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:25,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:25,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:25,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:25,176 INFO L124 PetriNetUnfolderBase]: 972/1588 cut-off events. [2024-06-04 14:06:25,177 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-06-04 14:06:25,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1588 events. 972/1588 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7840 event pairs, 304 based on Foata normal form. 7/1590 useless extension candidates. Maximal degree in co-relation 3986. Up to 1312 conditions per place. [2024-06-04 14:06:25,186 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-04 14:06:25,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 430 flow [2024-06-04 14:06:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 14:06:25,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-04 14:06:25,188 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 137 transitions. [2024-06-04 14:06:25,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 430 flow [2024-06-04 14:06:25,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 82 transitions, 428 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:25,191 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 278 flow [2024-06-04 14:06:25,191 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2024-06-04 14:06:25,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-04 14:06:25,191 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 278 flow [2024-06-04 14:06:25,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:25,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:25,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:25,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:06:25,192 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)] === [2024-06-04 14:06:25,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:25,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1162563891, now seen corresponding path program 1 times [2024-06-04 14:06:25,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:25,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376747791] [2024-06-04 14:06:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:25,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:25,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:25,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376747791] [2024-06-04 14:06:25,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376747791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:25,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:25,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:25,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910307503] [2024-06-04 14:06:25,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:25,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:25,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:25,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:25,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:25,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:25,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:25,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:25,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:25,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:25,542 INFO L124 PetriNetUnfolderBase]: 1054/1742 cut-off events. [2024-06-04 14:06:25,542 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-04 14:06:25,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5475 conditions, 1742 events. 1054/1742 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8953 event pairs, 197 based on Foata normal form. 26/1763 useless extension candidates. Maximal degree in co-relation 5452. Up to 1290 conditions per place. [2024-06-04 14:06:25,553 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-04 14:06:25,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 582 flow [2024-06-04 14:06:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:06:25,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-04 14:06:25,555 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 278 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:06:25,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 582 flow [2024-06-04 14:06:25,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 572 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:25,561 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 339 flow [2024-06-04 14:06:25,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-04 14:06:25,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 14:06:25,562 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 339 flow [2024-06-04 14:06:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:25,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:25,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:25,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:06:25,563 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)] === [2024-06-04 14:06:25,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1976063819, now seen corresponding path program 1 times [2024-06-04 14:06:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:25,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532878167] [2024-06-04 14:06:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:25,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:25,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:25,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532878167] [2024-06-04 14:06:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532878167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:25,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:25,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:06:25,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260033910] [2024-06-04 14:06:25,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:25,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:06:25,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:25,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:06:25,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:06:25,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 14:06:25,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:25,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:25,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 14:06:25,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:25,806 INFO L124 PetriNetUnfolderBase]: 801/1436 cut-off events. [2024-06-04 14:06:25,806 INFO L125 PetriNetUnfolderBase]: For 2705/2739 co-relation queries the response was YES. [2024-06-04 14:06:25,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1436 events. 801/1436 cut-off events. For 2705/2739 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7887 event pairs, 231 based on Foata normal form. 4/1396 useless extension candidates. Maximal degree in co-relation 4794. Up to 1191 conditions per place. [2024-06-04 14:06:25,814 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-04 14:06:25,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 511 flow [2024-06-04 14:06:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-04 14:06:25,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 14:06:25,816 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 339 flow. Second operand 4 states and 102 transitions. [2024-06-04 14:06:25,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 511 flow [2024-06-04 14:06:25,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 460 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:25,819 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 354 flow [2024-06-04 14:06:25,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-06-04 14:06:25,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 14:06:25,820 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 354 flow [2024-06-04 14:06:25,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:25,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:25,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:25,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:06:25,821 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)] === [2024-06-04 14:06:25,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1129415895, now seen corresponding path program 1 times [2024-06-04 14:06:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518249510] [2024-06-04 14:06:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:25,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:25,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518249510] [2024-06-04 14:06:25,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518249510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:25,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:25,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:25,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286853419] [2024-06-04 14:06:25,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:25,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:25,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:25,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:25,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:25,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:25,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-04 14:06:25,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:25,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:25,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:26,153 INFO L124 PetriNetUnfolderBase]: 1050/1744 cut-off events. [2024-06-04 14:06:26,154 INFO L125 PetriNetUnfolderBase]: For 4014/4018 co-relation queries the response was YES. [2024-06-04 14:06:26,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1744 events. 1050/1744 cut-off events. For 4014/4018 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9097 event pairs, 307 based on Foata normal form. 7/1746 useless extension candidates. Maximal degree in co-relation 6070. Up to 1463 conditions per place. [2024-06-04 14:06:26,164 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 24 changer transitions 0/86 dead transitions. [2024-06-04 14:06:26,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 641 flow [2024-06-04 14:06:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 14:06:26,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-04 14:06:26,166 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 354 flow. Second operand 5 states and 129 transitions. [2024-06-04 14:06:26,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 641 flow [2024-06-04 14:06:26,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 608 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:26,170 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 436 flow [2024-06-04 14:06:26,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-06-04 14:06:26,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-04 14:06:26,171 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 436 flow [2024-06-04 14:06:26,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-04 14:06:26,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:26,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:26,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:06:26,172 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)] === [2024-06-04 14:06:26,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 460366480, now seen corresponding path program 1 times [2024-06-04 14:06:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994491492] [2024-06-04 14:06:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:26,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994491492] [2024-06-04 14:06:26,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994491492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:26,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:26,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908357058] [2024-06-04 14:06:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:26,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:26,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:26,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:26,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-04 14:06:26,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:26,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:26,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:26,465 INFO L124 PetriNetUnfolderBase]: 1053/1744 cut-off events. [2024-06-04 14:06:26,466 INFO L125 PetriNetUnfolderBase]: For 4867/4867 co-relation queries the response was YES. [2024-06-04 14:06:26,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6525 conditions, 1744 events. 1053/1744 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8983 event pairs, 333 based on Foata normal form. 4/1744 useless extension candidates. Maximal degree in co-relation 6496. Up to 1457 conditions per place. [2024-06-04 14:06:26,476 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 60 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-04 14:06:26,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 741 flow [2024-06-04 14:06:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-04 14:06:26,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-04 14:06:26,478 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 436 flow. Second operand 5 states and 131 transitions. [2024-06-04 14:06:26,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 741 flow [2024-06-04 14:06:26,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 708 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:26,485 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 498 flow [2024-06-04 14:06:26,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-04 14:06:26,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-04 14:06:26,486 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 498 flow [2024-06-04 14:06:26,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-04 14:06:26,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:26,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:26,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:06:26,487 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)] === [2024-06-04 14:06:26,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash -621774892, now seen corresponding path program 2 times [2024-06-04 14:06:26,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:26,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294735145] [2024-06-04 14:06:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:26,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294735145] [2024-06-04 14:06:26,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294735145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:26,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:26,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113782099] [2024-06-04 14:06:26,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:26,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:26,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:26,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-04 14:06:26,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:26,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:26,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:26,760 INFO L124 PetriNetUnfolderBase]: 1018/1669 cut-off events. [2024-06-04 14:06:26,761 INFO L125 PetriNetUnfolderBase]: For 5980/5984 co-relation queries the response was YES. [2024-06-04 14:06:26,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 1669 events. 1018/1669 cut-off events. For 5980/5984 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8425 event pairs, 335 based on Foata normal form. 5/1669 useless extension candidates. Maximal degree in co-relation 6376. Up to 1406 conditions per place. [2024-06-04 14:06:26,772 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-06-04 14:06:26,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 730 flow [2024-06-04 14:06:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 14:06:26,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-04 14:06:26,774 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 498 flow. Second operand 5 states and 126 transitions. [2024-06-04 14:06:26,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 730 flow [2024-06-04 14:06:26,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 694 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:26,781 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 524 flow [2024-06-04 14:06:26,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-04 14:06:26,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-04 14:06:26,782 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 524 flow [2024-06-04 14:06:26,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-04 14:06:26,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:26,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:26,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:06:26,783 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)] === [2024-06-04 14:06:26,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1258070056, now seen corresponding path program 1 times [2024-06-04 14:06:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:26,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956535088] [2024-06-04 14:06:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:26,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956535088] [2024-06-04 14:06:26,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956535088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:26,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:26,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:26,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097062554] [2024-06-04 14:06:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:26,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:26,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:26,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:26,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:26,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:26,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:26,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:27,130 INFO L124 PetriNetUnfolderBase]: 1085/1784 cut-off events. [2024-06-04 14:06:27,130 INFO L125 PetriNetUnfolderBase]: For 7663/7667 co-relation queries the response was YES. [2024-06-04 14:06:27,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6863 conditions, 1784 events. 1085/1784 cut-off events. For 7663/7667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9179 event pairs, 299 based on Foata normal form. 25/1804 useless extension candidates. Maximal degree in co-relation 6831. Up to 1391 conditions per place. [2024-06-04 14:06:27,140 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 30 changer transitions 0/98 dead transitions. [2024-06-04 14:06:27,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 826 flow [2024-06-04 14:06:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 14:06:27,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-04 14:06:27,142 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 524 flow. Second operand 6 states and 151 transitions. [2024-06-04 14:06:27,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 826 flow [2024-06-04 14:06:27,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 764 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:27,149 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 559 flow [2024-06-04 14:06:27,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=559, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-04 14:06:27,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-04 14:06:27,150 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 559 flow [2024-06-04 14:06:27,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:27,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:27,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:27,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:06:27,151 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)] === [2024-06-04 14:06:27,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash 61996686, now seen corresponding path program 1 times [2024-06-04 14:06:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:27,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329918748] [2024-06-04 14:06:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:27,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:27,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329918748] [2024-06-04 14:06:27,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329918748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:27,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:27,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:27,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959450490] [2024-06-04 14:06:27,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:27,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:27,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:27,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:27,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 559 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:27,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:27,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:27,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:27,422 INFO L124 PetriNetUnfolderBase]: 1096/1818 cut-off events. [2024-06-04 14:06:27,423 INFO L125 PetriNetUnfolderBase]: For 8420/8426 co-relation queries the response was YES. [2024-06-04 14:06:27,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7306 conditions, 1818 events. 1096/1818 cut-off events. For 8420/8426 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9507 event pairs, 358 based on Foata normal form. 5/1821 useless extension candidates. Maximal degree in co-relation 7273. Up to 1531 conditions per place. [2024-06-04 14:06:27,436 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-04 14:06:27,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 837 flow [2024-06-04 14:06:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 14:06:27,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-04 14:06:27,438 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 559 flow. Second operand 5 states and 124 transitions. [2024-06-04 14:06:27,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 837 flow [2024-06-04 14:06:27,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 762 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:27,449 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 570 flow [2024-06-04 14:06:27,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=570, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-04 14:06:27,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-04 14:06:27,450 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 570 flow [2024-06-04 14:06:27,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:27,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:27,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:27,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:06:27,450 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)] === [2024-06-04 14:06:27,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash 60955086, now seen corresponding path program 2 times [2024-06-04 14:06:27,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:27,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928839930] [2024-06-04 14:06:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:27,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:27,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:27,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928839930] [2024-06-04 14:06:27,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928839930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:27,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:27,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263331728] [2024-06-04 14:06:27,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:27,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:27,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:27,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 570 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:27,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:27,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:27,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:27,724 INFO L124 PetriNetUnfolderBase]: 1091/1803 cut-off events. [2024-06-04 14:06:27,724 INFO L125 PetriNetUnfolderBase]: For 9368/9374 co-relation queries the response was YES. [2024-06-04 14:06:27,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7250 conditions, 1803 events. 1091/1803 cut-off events. For 9368/9374 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9368 event pairs, 350 based on Foata normal form. 8/1809 useless extension candidates. Maximal degree in co-relation 7216. Up to 1526 conditions per place. [2024-06-04 14:06:27,735 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-04 14:06:27,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 792 flow [2024-06-04 14:06:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-04 14:06:27,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 14:06:27,737 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 570 flow. Second operand 5 states and 125 transitions. [2024-06-04 14:06:27,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 792 flow [2024-06-04 14:06:27,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 746 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:27,746 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 584 flow [2024-06-04 14:06:27,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-04 14:06:27,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-04 14:06:27,747 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 584 flow [2024-06-04 14:06:27,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:27,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:27,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:27,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:06:27,748 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)] === [2024-06-04 14:06:27,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591957, now seen corresponding path program 1 times [2024-06-04 14:06:27,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:27,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783871182] [2024-06-04 14:06:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:27,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783871182] [2024-06-04 14:06:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783871182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:27,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:27,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:27,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719028254] [2024-06-04 14:06:27,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:27,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:27,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:27,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:27,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:27,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:27,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:27,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:28,080 INFO L124 PetriNetUnfolderBase]: 1194/1976 cut-off events. [2024-06-04 14:06:28,080 INFO L125 PetriNetUnfolderBase]: For 11766/11766 co-relation queries the response was YES. [2024-06-04 14:06:28,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8121 conditions, 1976 events. 1194/1976 cut-off events. For 11766/11766 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10435 event pairs, 264 based on Foata normal form. 4/1975 useless extension candidates. Maximal degree in co-relation 8087. Up to 1385 conditions per place. [2024-06-04 14:06:28,091 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 33 changer transitions 0/110 dead transitions. [2024-06-04 14:06:28,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 956 flow [2024-06-04 14:06:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:06:28,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 14:06:28,093 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 584 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:06:28,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 956 flow [2024-06-04 14:06:28,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 878 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:28,106 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 619 flow [2024-06-04 14:06:28,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=619, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-04 14:06:28,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-04 14:06:28,107 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 619 flow [2024-06-04 14:06:28,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:28,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:28,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:28,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:06:28,107 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)] === [2024-06-04 14:06:28,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2129767445, now seen corresponding path program 2 times [2024-06-04 14:06:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:28,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806124091] [2024-06-04 14:06:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:28,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:28,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:28,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806124091] [2024-06-04 14:06:28,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806124091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:28,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:28,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:28,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510011353] [2024-06-04 14:06:28,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:28,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:28,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:28,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:28,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:28,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 619 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:28,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:28,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:28,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:28,434 INFO L124 PetriNetUnfolderBase]: 1186/1954 cut-off events. [2024-06-04 14:06:28,435 INFO L125 PetriNetUnfolderBase]: For 13181/13181 co-relation queries the response was YES. [2024-06-04 14:06:28,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8307 conditions, 1954 events. 1186/1954 cut-off events. For 13181/13181 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10245 event pairs, 343 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 8273. Up to 1665 conditions per place. [2024-06-04 14:06:28,446 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 31 changer transitions 0/104 dead transitions. [2024-06-04 14:06:28,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 883 flow [2024-06-04 14:06:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:06:28,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 14:06:28,447 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 619 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:06:28,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 883 flow [2024-06-04 14:06:28,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 837 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:28,466 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 654 flow [2024-06-04 14:06:28,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=654, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-04 14:06:28,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-04 14:06:28,467 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 654 flow [2024-06-04 14:06:28,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:28,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:28,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:06:28,468 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:28,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -847834086, now seen corresponding path program 1 times [2024-06-04 14:06:28,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:28,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764797738] [2024-06-04 14:06:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:28,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764797738] [2024-06-04 14:06:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764797738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:28,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:28,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552391045] [2024-06-04 14:06:28,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:28,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:28,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 654 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:28,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:28,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:28,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:28,799 INFO L124 PetriNetUnfolderBase]: 1191/1970 cut-off events. [2024-06-04 14:06:28,799 INFO L125 PetriNetUnfolderBase]: For 14397/14397 co-relation queries the response was YES. [2024-06-04 14:06:28,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8598 conditions, 1970 events. 1191/1970 cut-off events. For 14397/14397 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10404 event pairs, 319 based on Foata normal form. 1/1970 useless extension candidates. Maximal degree in co-relation 8562. Up to 1813 conditions per place. [2024-06-04 14:06:28,819 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 85 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-04 14:06:28,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 106 transitions, 980 flow [2024-06-04 14:06:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 14:06:28,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 14:06:28,820 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 654 flow. Second operand 5 states and 118 transitions. [2024-06-04 14:06:28,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 106 transitions, 980 flow [2024-06-04 14:06:28,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 907 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:28,838 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 693 flow [2024-06-04 14:06:28,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=693, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-04 14:06:28,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-04 14:06:28,838 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 693 flow [2024-06-04 14:06:28,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:28,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:28,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:28,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:06:28,839 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:28,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2110953095, now seen corresponding path program 1 times [2024-06-04 14:06:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:28,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623638448] [2024-06-04 14:06:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:28,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:28,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623638448] [2024-06-04 14:06:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623638448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:28,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:28,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666436229] [2024-06-04 14:06:28,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:28,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:28,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:28,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 693 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:28,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:28,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:28,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:29,192 INFO L124 PetriNetUnfolderBase]: 1183/1943 cut-off events. [2024-06-04 14:06:29,192 INFO L125 PetriNetUnfolderBase]: For 16328/16334 co-relation queries the response was YES. [2024-06-04 14:06:29,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8656 conditions, 1943 events. 1183/1943 cut-off events. For 16328/16334 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10168 event pairs, 337 based on Foata normal form. 6/1944 useless extension candidates. Maximal degree in co-relation 8618. Up to 1660 conditions per place. [2024-06-04 14:06:29,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 75 selfloop transitions, 31 changer transitions 0/112 dead transitions. [2024-06-04 14:06:29,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 979 flow [2024-06-04 14:06:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:06:29,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 14:06:29,205 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 693 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:06:29,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 979 flow [2024-06-04 14:06:29,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 959 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:29,226 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 770 flow [2024-06-04 14:06:29,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=770, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-06-04 14:06:29,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-04 14:06:29,227 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 770 flow [2024-06-04 14:06:29,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:29,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:29,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:29,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:06:29,227 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)] === [2024-06-04 14:06:29,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2119523975, now seen corresponding path program 2 times [2024-06-04 14:06:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:29,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589741391] [2024-06-04 14:06:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:29,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589741391] [2024-06-04 14:06:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589741391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037878892] [2024-06-04 14:06:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:29,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:29,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:29,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 770 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:29,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:29,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:29,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:29,607 INFO L124 PetriNetUnfolderBase]: 1236/2049 cut-off events. [2024-06-04 14:06:29,608 INFO L125 PetriNetUnfolderBase]: For 19736/19742 co-relation queries the response was YES. [2024-06-04 14:06:29,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9416 conditions, 2049 events. 1236/2049 cut-off events. For 19736/19742 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10944 event pairs, 307 based on Foata normal form. 6/2050 useless extension candidates. Maximal degree in co-relation 9375. Up to 1487 conditions per place. [2024-06-04 14:06:29,620 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2024-06-04 14:06:29,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1158 flow [2024-06-04 14:06:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 14:06:29,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 14:06:29,622 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 770 flow. Second operand 6 states and 150 transitions. [2024-06-04 14:06:29,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1158 flow [2024-06-04 14:06:29,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 1081 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:29,643 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 808 flow [2024-06-04 14:06:29,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=808, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-04 14:06:29,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 14:06:29,644 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 808 flow [2024-06-04 14:06:29,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:29,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:29,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:29,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:06:29,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:29,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1912117452, now seen corresponding path program 2 times [2024-06-04 14:06:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:29,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699451312] [2024-06-04 14:06:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:29,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:29,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699451312] [2024-06-04 14:06:29,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699451312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:29,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:29,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:29,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11809519] [2024-06-04 14:06:29,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:29,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:29,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:29,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:29,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:29,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 808 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:29,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:29,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:29,965 INFO L124 PetriNetUnfolderBase]: 1238/2072 cut-off events. [2024-06-04 14:06:29,965 INFO L125 PetriNetUnfolderBase]: For 21541/21541 co-relation queries the response was YES. [2024-06-04 14:06:29,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9679 conditions, 2072 events. 1238/2072 cut-off events. For 21541/21541 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11179 event pairs, 346 based on Foata normal form. 2/2073 useless extension candidates. Maximal degree in co-relation 9637. Up to 1893 conditions per place. [2024-06-04 14:06:29,979 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-04 14:06:29,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1090 flow [2024-06-04 14:06:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-04 14:06:29,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 14:06:29,981 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 808 flow. Second operand 4 states and 102 transitions. [2024-06-04 14:06:29,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1090 flow [2024-06-04 14:06:30,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 1028 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:30,004 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 834 flow [2024-06-04 14:06:30,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=834, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-04 14:06:30,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-04 14:06:30,006 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 834 flow [2024-06-04 14:06:30,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:30,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:30,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:06:30,006 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:30,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1509716165, now seen corresponding path program 1 times [2024-06-04 14:06:30,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:30,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977591795] [2024-06-04 14:06:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977591795] [2024-06-04 14:06:30,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977591795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:30,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:30,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:30,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484755814] [2024-06-04 14:06:30,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:30,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:30,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:30,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 834 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:30,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:30,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:30,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:30,368 INFO L124 PetriNetUnfolderBase]: 1279/2130 cut-off events. [2024-06-04 14:06:30,368 INFO L125 PetriNetUnfolderBase]: For 25565/25573 co-relation queries the response was YES. [2024-06-04 14:06:30,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10140 conditions, 2130 events. 1279/2130 cut-off events. For 25565/25573 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11640 event pairs, 286 based on Foata normal form. 15/2142 useless extension candidates. Maximal degree in co-relation 10096. Up to 1066 conditions per place. [2024-06-04 14:06:30,384 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 32 changer transitions 0/124 dead transitions. [2024-06-04 14:06:30,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1180 flow [2024-06-04 14:06:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:06:30,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 14:06:30,386 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 834 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:06:30,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1180 flow [2024-06-04 14:06:30,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 124 transitions, 1140 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:30,413 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 876 flow [2024-06-04 14:06:30,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=876, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-06-04 14:06:30,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-04 14:06:30,413 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 876 flow [2024-06-04 14:06:30,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:30,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:30,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:30,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:06:30,414 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)] === [2024-06-04 14:06:30,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:30,414 INFO L85 PathProgramCache]: Analyzing trace with hash 905879701, now seen corresponding path program 2 times [2024-06-04 14:06:30,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:30,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283187678] [2024-06-04 14:06:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:30,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:30,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283187678] [2024-06-04 14:06:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283187678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:30,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:30,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:30,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173595594] [2024-06-04 14:06:30,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:30,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:30,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:30,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 876 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:30,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:30,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:30,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:30,779 INFO L124 PetriNetUnfolderBase]: 1259/2095 cut-off events. [2024-06-04 14:06:30,780 INFO L125 PetriNetUnfolderBase]: For 26149/26157 co-relation queries the response was YES. [2024-06-04 14:06:30,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10180 conditions, 2095 events. 1259/2095 cut-off events. For 26149/26157 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11340 event pairs, 292 based on Foata normal form. 15/2105 useless extension candidates. Maximal degree in co-relation 10135. Up to 1555 conditions per place. [2024-06-04 14:06:30,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 35 changer transitions 0/125 dead transitions. [2024-06-04 14:06:30,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 125 transitions, 1182 flow [2024-06-04 14:06:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:06:30,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 14:06:30,799 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 876 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:06:30,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 125 transitions, 1182 flow [2024-06-04 14:06:30,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 1129 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:30,829 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 899 flow [2024-06-04 14:06:30,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=899, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-06-04 14:06:30,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-04 14:06:30,830 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 899 flow [2024-06-04 14:06:30,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:30,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:30,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:30,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:06:30,830 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:30,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash 662167364, now seen corresponding path program 1 times [2024-06-04 14:06:30,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:30,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827575177] [2024-06-04 14:06:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:30,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827575177] [2024-06-04 14:06:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827575177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:30,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:30,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:30,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854590644] [2024-06-04 14:06:30,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:30,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:30,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 899 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:30,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:30,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:30,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:31,171 INFO L124 PetriNetUnfolderBase]: 1298/2182 cut-off events. [2024-06-04 14:06:31,172 INFO L125 PetriNetUnfolderBase]: For 28227/28227 co-relation queries the response was YES. [2024-06-04 14:06:31,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10606 conditions, 2182 events. 1298/2182 cut-off events. For 28227/28227 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12023 event pairs, 362 based on Foata normal form. 3/2180 useless extension candidates. Maximal degree in co-relation 10560. Up to 1766 conditions per place. [2024-06-04 14:06:31,187 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 48 changer transitions 0/146 dead transitions. [2024-06-04 14:06:31,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 146 transitions, 1525 flow [2024-06-04 14:06:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 14:06:31,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-04 14:06:31,204 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 899 flow. Second operand 6 states and 155 transitions. [2024-06-04 14:06:31,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 146 transitions, 1525 flow [2024-06-04 14:06:31,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 146 transitions, 1442 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:31,250 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1130 flow [2024-06-04 14:06:31,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1130, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-04 14:06:31,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-04 14:06:31,252 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1130 flow [2024-06-04 14:06:31,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:31,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:31,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:31,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:06:31,253 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)] === [2024-06-04 14:06:31,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1384017821, now seen corresponding path program 3 times [2024-06-04 14:06:31,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:31,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868145244] [2024-06-04 14:06:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:31,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868145244] [2024-06-04 14:06:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868145244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:31,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:31,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:31,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609698110] [2024-06-04 14:06:31,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:31,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:31,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1130 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:31,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:31,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:31,692 INFO L124 PetriNetUnfolderBase]: 1400/2370 cut-off events. [2024-06-04 14:06:31,692 INFO L125 PetriNetUnfolderBase]: For 36302/36312 co-relation queries the response was YES. [2024-06-04 14:06:31,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12154 conditions, 2370 events. 1400/2370 cut-off events. For 36302/36312 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13445 event pairs, 318 based on Foata normal form. 22/2390 useless extension candidates. Maximal degree in co-relation 12105. Up to 1692 conditions per place. [2024-06-04 14:06:31,711 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-04 14:06:31,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 152 transitions, 1608 flow [2024-06-04 14:06:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:06:31,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 14:06:31,713 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1130 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:06:31,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 152 transitions, 1608 flow [2024-06-04 14:06:31,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 1570 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:31,751 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1186 flow [2024-06-04 14:06:31,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1186, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-04 14:06:31,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 14:06:31,752 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1186 flow [2024-06-04 14:06:31,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:31,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:31,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:31,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:06:31,753 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:31,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1546328807, now seen corresponding path program 4 times [2024-06-04 14:06:31,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:31,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011646590] [2024-06-04 14:06:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:31,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:31,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011646590] [2024-06-04 14:06:31,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011646590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:31,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:31,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032788807] [2024-06-04 14:06:31,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:31,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:31,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:31,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:31,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:31,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:31,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1186 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:31,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:31,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:31,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:32,173 INFO L124 PetriNetUnfolderBase]: 1458/2466 cut-off events. [2024-06-04 14:06:32,174 INFO L125 PetriNetUnfolderBase]: For 41016/41026 co-relation queries the response was YES. [2024-06-04 14:06:32,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12789 conditions, 2466 events. 1458/2466 cut-off events. For 41016/41026 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14146 event pairs, 426 based on Foata normal form. 21/2485 useless extension candidates. Maximal degree in co-relation 12737. Up to 2045 conditions per place. [2024-06-04 14:06:32,188 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 27 changer transitions 0/145 dead transitions. [2024-06-04 14:06:32,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1543 flow [2024-06-04 14:06:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:06:32,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 14:06:32,189 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1186 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:06:32,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1543 flow [2024-06-04 14:06:32,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 145 transitions, 1501 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:32,232 INFO L231 Difference]: Finished difference. Result has 111 places, 122 transitions, 1222 flow [2024-06-04 14:06:32,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1222, PETRI_PLACES=111, PETRI_TRANSITIONS=122} [2024-06-04 14:06:32,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-04 14:06:32,233 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 122 transitions, 1222 flow [2024-06-04 14:06:32,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:32,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:32,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:32,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:06:32,234 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)] === [2024-06-04 14:06:32,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:32,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1551691187, now seen corresponding path program 5 times [2024-06-04 14:06:32,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:32,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969477407] [2024-06-04 14:06:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969477407] [2024-06-04 14:06:32,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969477407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:32,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:32,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119097875] [2024-06-04 14:06:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:32,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:32,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:32,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:32,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:32,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 1222 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:32,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:32,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:32,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:32,599 INFO L124 PetriNetUnfolderBase]: 1430/2424 cut-off events. [2024-06-04 14:06:32,599 INFO L125 PetriNetUnfolderBase]: For 40480/40490 co-relation queries the response was YES. [2024-06-04 14:06:32,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12524 conditions, 2424 events. 1430/2424 cut-off events. For 40480/40490 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13868 event pairs, 407 based on Foata normal form. 26/2448 useless extension candidates. Maximal degree in co-relation 12470. Up to 2001 conditions per place. [2024-06-04 14:06:32,615 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-04 14:06:32,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 148 transitions, 1578 flow [2024-06-04 14:06:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:06:32,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 14:06:32,618 INFO L175 Difference]: Start difference. First operand has 111 places, 122 transitions, 1222 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:06:32,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 148 transitions, 1578 flow [2024-06-04 14:06:32,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 148 transitions, 1519 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:32,664 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1224 flow [2024-06-04 14:06:32,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1224, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-04 14:06:32,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-04 14:06:32,664 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1224 flow [2024-06-04 14:06:32,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:32,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:32,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:32,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:06:32,665 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:32,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1546113605, now seen corresponding path program 1 times [2024-06-04 14:06:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:32,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229433138] [2024-06-04 14:06:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:32,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:32,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229433138] [2024-06-04 14:06:32,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229433138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:32,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:32,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:32,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459274500] [2024-06-04 14:06:32,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:32,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:32,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:32,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:32,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:32,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:32,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1224 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:32,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:32,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:32,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:33,067 INFO L124 PetriNetUnfolderBase]: 1471/2503 cut-off events. [2024-06-04 14:06:33,067 INFO L125 PetriNetUnfolderBase]: For 42585/42595 co-relation queries the response was YES. [2024-06-04 14:06:33,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 2503 events. 1471/2503 cut-off events. For 42585/42595 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14505 event pairs, 348 based on Foata normal form. 17/2518 useless extension candidates. Maximal degree in co-relation 12811. Up to 1783 conditions per place. [2024-06-04 14:06:33,089 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-04 14:06:33,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 149 transitions, 1599 flow [2024-06-04 14:06:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:06:33,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 14:06:33,092 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1224 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:06:33,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 149 transitions, 1599 flow [2024-06-04 14:06:33,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1531 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:33,142 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 1241 flow [2024-06-04 14:06:33,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1241, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-04 14:06:33,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-04 14:06:33,143 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 1241 flow [2024-06-04 14:06:33,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:33,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:33,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:33,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:06:33,143 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)] === [2024-06-04 14:06:33,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2108308426, now seen corresponding path program 2 times [2024-06-04 14:06:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836329116] [2024-06-04 14:06:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:33,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:33,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836329116] [2024-06-04 14:06:33,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836329116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:33,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:33,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:33,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327267367] [2024-06-04 14:06:33,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:33,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:33,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:33,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:33,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 1241 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:33,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:33,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:33,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:33,517 INFO L124 PetriNetUnfolderBase]: 1514/2559 cut-off events. [2024-06-04 14:06:33,517 INFO L125 PetriNetUnfolderBase]: For 43664/43664 co-relation queries the response was YES. [2024-06-04 14:06:33,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13394 conditions, 2559 events. 1514/2559 cut-off events. For 43664/43664 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14821 event pairs, 408 based on Foata normal form. 3/2557 useless extension candidates. Maximal degree in co-relation 13338. Up to 2099 conditions per place. [2024-06-04 14:06:33,534 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 53 changer transitions 0/154 dead transitions. [2024-06-04 14:06:33,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 154 transitions, 1855 flow [2024-06-04 14:06:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:06:33,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 14:06:33,536 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 1241 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:06:33,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 154 transitions, 1855 flow [2024-06-04 14:06:33,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 154 transitions, 1785 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:33,586 INFO L231 Difference]: Finished difference. Result has 117 places, 133 transitions, 1408 flow [2024-06-04 14:06:33,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1408, PETRI_PLACES=117, PETRI_TRANSITIONS=133} [2024-06-04 14:06:33,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-04 14:06:33,587 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 133 transitions, 1408 flow [2024-06-04 14:06:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:33,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:33,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:06:33,588 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)] === [2024-06-04 14:06:33,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1373217612, now seen corresponding path program 1 times [2024-06-04 14:06:33,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:33,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950516667] [2024-06-04 14:06:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:33,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:33,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:33,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950516667] [2024-06-04 14:06:33,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950516667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:33,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:33,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500353029] [2024-06-04 14:06:33,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:33,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:33,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:33,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 133 transitions, 1408 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:33,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:33,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:33,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:33,995 INFO L124 PetriNetUnfolderBase]: 1519/2577 cut-off events. [2024-06-04 14:06:33,995 INFO L125 PetriNetUnfolderBase]: For 45739/45739 co-relation queries the response was YES. [2024-06-04 14:06:34,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13658 conditions, 2577 events. 1519/2577 cut-off events. For 45739/45739 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14962 event pairs, 386 based on Foata normal form. 1/2577 useless extension candidates. Maximal degree in co-relation 13600. Up to 2342 conditions per place. [2024-06-04 14:06:34,010 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 125 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-04 14:06:34,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 156 transitions, 1888 flow [2024-06-04 14:06:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 14:06:34,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-04 14:06:34,011 INFO L175 Difference]: Start difference. First operand has 117 places, 133 transitions, 1408 flow. Second operand 6 states and 137 transitions. [2024-06-04 14:06:34,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 156 transitions, 1888 flow [2024-06-04 14:06:34,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 156 transitions, 1799 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:34,053 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1469 flow [2024-06-04 14:06:34,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-04 14:06:34,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-04 14:06:34,054 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1469 flow [2024-06-04 14:06:34,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:34,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:34,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:34,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:06:34,054 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:34,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:34,054 INFO L85 PathProgramCache]: Analyzing trace with hash -606407173, now seen corresponding path program 2 times [2024-06-04 14:06:34,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:34,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695394646] [2024-06-04 14:06:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:34,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695394646] [2024-06-04 14:06:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695394646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:34,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:34,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310993230] [2024-06-04 14:06:34,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:34,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:34,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:34,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:34,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1469 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:34,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:34,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:34,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:34,448 INFO L124 PetriNetUnfolderBase]: 1499/2536 cut-off events. [2024-06-04 14:06:34,449 INFO L125 PetriNetUnfolderBase]: For 48833/48833 co-relation queries the response was YES. [2024-06-04 14:06:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13327 conditions, 2536 events. 1499/2536 cut-off events. For 48833/48833 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14605 event pairs, 274 based on Foata normal form. 12/2543 useless extension candidates. Maximal degree in co-relation 13268. Up to 1931 conditions per place. [2024-06-04 14:06:34,468 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-04 14:06:34,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1875 flow [2024-06-04 14:06:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:06:34,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 14:06:34,470 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1469 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:06:34,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1875 flow [2024-06-04 14:06:34,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 168 transitions, 1823 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:34,543 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1493 flow [2024-06-04 14:06:34,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1493, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-04 14:06:34,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-04 14:06:34,544 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1493 flow [2024-06-04 14:06:34,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:34,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:34,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:34,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:06:34,544 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:34,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 830815325, now seen corresponding path program 3 times [2024-06-04 14:06:34,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:34,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157783216] [2024-06-04 14:06:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:34,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:34,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:34,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157783216] [2024-06-04 14:06:34,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157783216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:34,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:34,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:34,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602857040] [2024-06-04 14:06:34,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:34,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:34,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:34,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:34,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:34,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:34,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1493 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:34,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:34,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:34,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:34,975 INFO L124 PetriNetUnfolderBase]: 1479/2514 cut-off events. [2024-06-04 14:06:34,975 INFO L125 PetriNetUnfolderBase]: For 49509/49517 co-relation queries the response was YES. [2024-06-04 14:06:34,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13233 conditions, 2514 events. 1479/2514 cut-off events. For 49509/49517 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14552 event pairs, 254 based on Foata normal form. 15/2526 useless extension candidates. Maximal degree in co-relation 13172. Up to 1219 conditions per place. [2024-06-04 14:06:34,995 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-04 14:06:34,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 162 transitions, 1827 flow [2024-06-04 14:06:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 14:06:35,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 14:06:35,012 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1493 flow. Second operand 6 states and 142 transitions. [2024-06-04 14:06:35,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 162 transitions, 1827 flow [2024-06-04 14:06:35,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 162 transitions, 1726 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:35,095 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1422 flow [2024-06-04 14:06:35,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1422, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-04 14:06:35,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-04 14:06:35,099 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1422 flow [2024-06-04 14:06:35,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2024-06-04 14:06:35,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:35,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:35,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:06:35,100 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:35,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash -853900106, now seen corresponding path program 2 times [2024-06-04 14:06:35,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:35,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923989581] [2024-06-04 14:06:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:35,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:35,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:35,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923989581] [2024-06-04 14:06:35,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923989581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:35,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:35,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564560092] [2024-06-04 14:06:35,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:35,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:35,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:35,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:35,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:35,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1422 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:35,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:35,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:35,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:35,609 INFO L124 PetriNetUnfolderBase]: 1476/2509 cut-off events. [2024-06-04 14:06:35,609 INFO L125 PetriNetUnfolderBase]: For 44117/44117 co-relation queries the response was YES. [2024-06-04 14:06:35,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13076 conditions, 2509 events. 1476/2509 cut-off events. For 44117/44117 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14520 event pairs, 358 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 13014. Up to 2281 conditions per place. [2024-06-04 14:06:35,627 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 127 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2024-06-04 14:06:35,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1754 flow [2024-06-04 14:06:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 14:06:35,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 14:06:35,628 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1422 flow. Second operand 5 states and 118 transitions. [2024-06-04 14:06:35,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1754 flow [2024-06-04 14:06:35,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1584 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:06:35,686 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1298 flow [2024-06-04 14:06:35,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-04 14:06:35,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-04 14:06:35,687 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1298 flow [2024-06-04 14:06:35,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:35,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:35,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:35,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:06:35,687 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:35,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash 556194804, now seen corresponding path program 3 times [2024-06-04 14:06:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:35,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435649019] [2024-06-04 14:06:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:35,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:35,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435649019] [2024-06-04 14:06:35,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435649019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:35,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:35,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499339345] [2024-06-04 14:06:35,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:35,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:35,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:35,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1298 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:35,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:35,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:35,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:36,099 INFO L124 PetriNetUnfolderBase]: 1578/2679 cut-off events. [2024-06-04 14:06:36,099 INFO L125 PetriNetUnfolderBase]: For 50382/50384 co-relation queries the response was YES. [2024-06-04 14:06:36,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13524 conditions, 2679 events. 1578/2679 cut-off events. For 50382/50384 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15708 event pairs, 364 based on Foata normal form. 8/2686 useless extension candidates. Maximal degree in co-relation 13463. Up to 2191 conditions per place. [2024-06-04 14:06:36,117 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 68 changer transitions 0/191 dead transitions. [2024-06-04 14:06:36,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 2107 flow [2024-06-04 14:06:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 14:06:36,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-04 14:06:36,119 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1298 flow. Second operand 6 states and 158 transitions. [2024-06-04 14:06:36,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 2107 flow [2024-06-04 14:06:36,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 2041 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:36,190 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1721 flow [2024-06-04 14:06:36,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1721, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-04 14:06:36,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-04 14:06:36,199 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1721 flow [2024-06-04 14:06:36,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:36,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:36,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:36,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:06:36,208 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:36,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash 60126866, now seen corresponding path program 1 times [2024-06-04 14:06:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:36,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706361730] [2024-06-04 14:06:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:36,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:36,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706361730] [2024-06-04 14:06:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706361730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:36,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:36,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:36,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498803854] [2024-06-04 14:06:36,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:36,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:36,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:36,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:36,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1721 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:36,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:36,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:36,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:36,626 INFO L124 PetriNetUnfolderBase]: 1601/2702 cut-off events. [2024-06-04 14:06:36,627 INFO L125 PetriNetUnfolderBase]: For 56962/56970 co-relation queries the response was YES. [2024-06-04 14:06:36,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14963 conditions, 2702 events. 1601/2702 cut-off events. For 56962/56970 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15833 event pairs, 395 based on Foata normal form. 6/2703 useless extension candidates. Maximal degree in co-relation 14899. Up to 2191 conditions per place. [2024-06-04 14:06:36,647 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 77 changer transitions 0/194 dead transitions. [2024-06-04 14:06:36,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 194 transitions, 2463 flow [2024-06-04 14:06:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 14:06:36,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 14:06:36,650 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1721 flow. Second operand 6 states and 148 transitions. [2024-06-04 14:06:36,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 194 transitions, 2463 flow [2024-06-04 14:06:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 2413 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:36,759 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 2017 flow [2024-06-04 14:06:36,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2017, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-06-04 14:06:36,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-04 14:06:36,759 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 2017 flow [2024-06-04 14:06:36,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:36,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:36,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:06:36,760 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:36,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1550533458, now seen corresponding path program 2 times [2024-06-04 14:06:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:36,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525601007] [2024-06-04 14:06:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:36,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525601007] [2024-06-04 14:06:36,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525601007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:36,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:36,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179085139] [2024-06-04 14:06:36,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:36,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:36,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:36,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 2017 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:36,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:36,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:36,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:37,261 INFO L124 PetriNetUnfolderBase]: 1667/2819 cut-off events. [2024-06-04 14:06:37,261 INFO L125 PetriNetUnfolderBase]: For 63481/63481 co-relation queries the response was YES. [2024-06-04 14:06:37,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16454 conditions, 2819 events. 1667/2819 cut-off events. For 63481/63481 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16636 event pairs, 359 based on Foata normal form. 4/2822 useless extension candidates. Maximal degree in co-relation 16387. Up to 2518 conditions per place. [2024-06-04 14:06:37,284 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-04 14:06:37,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 212 transitions, 2856 flow [2024-06-04 14:06:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 14:06:37,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-04 14:06:37,286 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 2017 flow. Second operand 7 states and 155 transitions. [2024-06-04 14:06:37,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 212 transitions, 2856 flow [2024-06-04 14:06:37,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 212 transitions, 2760 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:37,388 INFO L231 Difference]: Finished difference. Result has 141 places, 196 transitions, 2376 flow [2024-06-04 14:06:37,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2376, PETRI_PLACES=141, PETRI_TRANSITIONS=196} [2024-06-04 14:06:37,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-04 14:06:37,389 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 196 transitions, 2376 flow [2024-06-04 14:06:37,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:37,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:37,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:37,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:06:37,389 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:37,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash 199098160, now seen corresponding path program 3 times [2024-06-04 14:06:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329036317] [2024-06-04 14:06:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:37,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:37,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:37,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329036317] [2024-06-04 14:06:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329036317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:37,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:37,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:37,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130930628] [2024-06-04 14:06:37,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:37,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:37,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:37,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:37,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 196 transitions, 2376 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:37,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:37,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:37,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:37,879 INFO L124 PetriNetUnfolderBase]: 1665/2825 cut-off events. [2024-06-04 14:06:37,879 INFO L125 PetriNetUnfolderBase]: For 66407/66407 co-relation queries the response was YES. [2024-06-04 14:06:37,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16577 conditions, 2825 events. 1665/2825 cut-off events. For 66407/66407 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16732 event pairs, 354 based on Foata normal form. 6/2830 useless extension candidates. Maximal degree in co-relation 16506. Up to 2266 conditions per place. [2024-06-04 14:06:37,904 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 99 changer transitions 0/229 dead transitions. [2024-06-04 14:06:37,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 3093 flow [2024-06-04 14:06:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:06:37,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-04 14:06:37,905 INFO L175 Difference]: Start difference. First operand has 141 places, 196 transitions, 2376 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:06:37,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 3093 flow [2024-06-04 14:06:37,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 229 transitions, 2963 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:37,996 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 2561 flow [2024-06-04 14:06:37,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2561, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2024-06-04 14:06:37,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-04 14:06:37,996 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 2561 flow [2024-06-04 14:06:37,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:37,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:37,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:37,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:06:37,997 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:37,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash 199344424, now seen corresponding path program 1 times [2024-06-04 14:06:37,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:37,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597652275] [2024-06-04 14:06:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:37,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:38,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:38,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597652275] [2024-06-04 14:06:38,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597652275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:38,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:38,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:38,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930187760] [2024-06-04 14:06:38,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:38,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:38,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:38,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:38,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 2561 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:38,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:38,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:38,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:38,457 INFO L124 PetriNetUnfolderBase]: 1660/2801 cut-off events. [2024-06-04 14:06:38,457 INFO L125 PetriNetUnfolderBase]: For 68181/68181 co-relation queries the response was YES. [2024-06-04 14:06:38,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16926 conditions, 2801 events. 1660/2801 cut-off events. For 68181/68181 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 16493 event pairs, 355 based on Foata normal form. 2/2802 useless extension candidates. Maximal degree in co-relation 16854. Up to 2557 conditions per place. [2024-06-04 14:06:38,480 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 196 selfloop transitions, 10 changer transitions 0/212 dead transitions. [2024-06-04 14:06:38,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 212 transitions, 3025 flow [2024-06-04 14:06:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-04 14:06:38,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 14:06:38,481 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 2561 flow. Second operand 4 states and 93 transitions. [2024-06-04 14:06:38,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 212 transitions, 3025 flow [2024-06-04 14:06:38,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 212 transitions, 2847 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:38,595 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2442 flow [2024-06-04 14:06:38,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2442, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-04 14:06:38,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-04 14:06:38,596 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2442 flow [2024-06-04 14:06:38,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:38,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:38,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:38,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:06:38,597 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:38,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1265996464, now seen corresponding path program 1 times [2024-06-04 14:06:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:38,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999929849] [2024-06-04 14:06:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:38,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:38,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:38,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999929849] [2024-06-04 14:06:38,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999929849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:38,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:38,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:38,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287569590] [2024-06-04 14:06:38,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:38,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:38,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:38,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:38,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:38,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2442 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:38,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:38,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:38,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:39,039 INFO L124 PetriNetUnfolderBase]: 1699/2859 cut-off events. [2024-06-04 14:06:39,040 INFO L125 PetriNetUnfolderBase]: For 74693/74693 co-relation queries the response was YES. [2024-06-04 14:06:39,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 2859 events. 1699/2859 cut-off events. For 74693/74693 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16891 event pairs, 389 based on Foata normal form. 3/2857 useless extension candidates. Maximal degree in co-relation 17084. Up to 2080 conditions per place. [2024-06-04 14:06:39,069 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 124 changer transitions 0/249 dead transitions. [2024-06-04 14:06:39,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 249 transitions, 3460 flow [2024-06-04 14:06:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:06:39,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-04 14:06:39,070 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2442 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:06:39,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 249 transitions, 3460 flow [2024-06-04 14:06:39,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 249 transitions, 3413 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:39,206 INFO L231 Difference]: Finished difference. Result has 152 places, 222 transitions, 3033 flow [2024-06-04 14:06:39,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=152, PETRI_TRANSITIONS=222} [2024-06-04 14:06:39,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-04 14:06:39,207 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 222 transitions, 3033 flow [2024-06-04 14:06:39,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:39,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:39,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:39,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:06:39,208 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)] === [2024-06-04 14:06:39,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1072211729, now seen corresponding path program 1 times [2024-06-04 14:06:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:39,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392980059] [2024-06-04 14:06:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:39,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:39,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392980059] [2024-06-04 14:06:39,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392980059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:39,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:39,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:39,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387588270] [2024-06-04 14:06:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:39,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:39,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 222 transitions, 3033 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:39,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:39,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:39,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:39,703 INFO L124 PetriNetUnfolderBase]: 1725/2892 cut-off events. [2024-06-04 14:06:39,704 INFO L125 PetriNetUnfolderBase]: For 83467/83467 co-relation queries the response was YES. [2024-06-04 14:06:39,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18996 conditions, 2892 events. 1725/2892 cut-off events. For 83467/83467 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17049 event pairs, 386 based on Foata normal form. 2/2889 useless extension candidates. Maximal degree in co-relation 18920. Up to 2320 conditions per place. [2024-06-04 14:06:39,725 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 91 changer transitions 0/254 dead transitions. [2024-06-04 14:06:39,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 254 transitions, 3988 flow [2024-06-04 14:06:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:06:39,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 14:06:39,726 INFO L175 Difference]: Start difference. First operand has 152 places, 222 transitions, 3033 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:06:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 254 transitions, 3988 flow [2024-06-04 14:06:39,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 3904 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:39,865 INFO L231 Difference]: Finished difference. Result has 158 places, 232 transitions, 3362 flow [2024-06-04 14:06:39,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3362, PETRI_PLACES=158, PETRI_TRANSITIONS=232} [2024-06-04 14:06:39,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 14:06:39,882 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 232 transitions, 3362 flow [2024-06-04 14:06:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:39,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:39,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:06:39,883 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)] === [2024-06-04 14:06:39,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash -379933867, now seen corresponding path program 2 times [2024-06-04 14:06:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:39,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622754313] [2024-06-04 14:06:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:39,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:39,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622754313] [2024-06-04 14:06:39,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622754313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:39,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:39,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:39,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877751819] [2024-06-04 14:06:39,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:39,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:39,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:39,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:39,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:40,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:40,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 232 transitions, 3362 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:40,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:40,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:40,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:40,340 INFO L124 PetriNetUnfolderBase]: 1719/2884 cut-off events. [2024-06-04 14:06:40,340 INFO L125 PetriNetUnfolderBase]: For 85214/85214 co-relation queries the response was YES. [2024-06-04 14:06:40,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18858 conditions, 2884 events. 1719/2884 cut-off events. For 85214/85214 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17039 event pairs, 386 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18778. Up to 2317 conditions per place. [2024-06-04 14:06:40,365 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 87 changer transitions 0/251 dead transitions. [2024-06-04 14:06:40,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 251 transitions, 4108 flow [2024-06-04 14:06:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:06:40,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 14:06:40,366 INFO L175 Difference]: Start difference. First operand has 158 places, 232 transitions, 3362 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:06:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 251 transitions, 4108 flow [2024-06-04 14:06:40,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 251 transitions, 3981 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:40,531 INFO L231 Difference]: Finished difference. Result has 162 places, 232 transitions, 3418 flow [2024-06-04 14:06:40,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3418, PETRI_PLACES=162, PETRI_TRANSITIONS=232} [2024-06-04 14:06:40,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-04 14:06:40,532 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 232 transitions, 3418 flow [2024-06-04 14:06:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:40,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:40,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:40,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:06:40,533 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:40,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1275262054, now seen corresponding path program 2 times [2024-06-04 14:06:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678069325] [2024-06-04 14:06:40,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:40,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:40,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:40,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678069325] [2024-06-04 14:06:40,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678069325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:40,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309559207] [2024-06-04 14:06:40,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:40,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:40,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:40,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:40,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:40,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:40,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 232 transitions, 3418 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:40,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:40,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:40,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:41,019 INFO L124 PetriNetUnfolderBase]: 1786/2996 cut-off events. [2024-06-04 14:06:41,020 INFO L125 PetriNetUnfolderBase]: For 94871/94871 co-relation queries the response was YES. [2024-06-04 14:06:41,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19914 conditions, 2996 events. 1786/2996 cut-off events. For 94871/94871 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17836 event pairs, 392 based on Foata normal form. 3/2994 useless extension candidates. Maximal degree in co-relation 19833. Up to 2136 conditions per place. [2024-06-04 14:06:41,047 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 134 selfloop transitions, 129 changer transitions 0/269 dead transitions. [2024-06-04 14:06:41,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 269 transitions, 4532 flow [2024-06-04 14:06:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:06:41,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 14:06:41,069 INFO L175 Difference]: Start difference. First operand has 162 places, 232 transitions, 3418 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:06:41,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 269 transitions, 4532 flow [2024-06-04 14:06:41,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 269 transitions, 4372 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:41,259 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3756 flow [2024-06-04 14:06:41,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3258, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3756, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-04 14:06:41,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-04 14:06:41,259 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3756 flow [2024-06-04 14:06:41,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:41,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:41,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:41,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:06:41,260 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:41,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1275250894, now seen corresponding path program 3 times [2024-06-04 14:06:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:41,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058469100] [2024-06-04 14:06:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:41,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058469100] [2024-06-04 14:06:41,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058469100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:41,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:41,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068937590] [2024-06-04 14:06:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:41,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:41,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:41,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3756 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:41,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:41,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:41,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:41,812 INFO L124 PetriNetUnfolderBase]: 1781/2990 cut-off events. [2024-06-04 14:06:41,812 INFO L125 PetriNetUnfolderBase]: For 98343/98343 co-relation queries the response was YES. [2024-06-04 14:06:41,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20193 conditions, 2990 events. 1781/2990 cut-off events. For 98343/98343 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17797 event pairs, 392 based on Foata normal form. 3/2988 useless extension candidates. Maximal degree in co-relation 20110. Up to 2134 conditions per place. [2024-06-04 14:06:41,835 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 130 changer transitions 0/268 dead transitions. [2024-06-04 14:06:41,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 4597 flow [2024-06-04 14:06:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:06:41,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 14:06:41,837 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3756 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:06:41,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 4597 flow [2024-06-04 14:06:42,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 268 transitions, 4341 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:42,011 INFO L231 Difference]: Finished difference. Result has 171 places, 247 transitions, 3791 flow [2024-06-04 14:06:42,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3791, PETRI_PLACES=171, PETRI_TRANSITIONS=247} [2024-06-04 14:06:42,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-04 14:06:42,012 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 247 transitions, 3791 flow [2024-06-04 14:06:42,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:42,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:42,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:06:42,013 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)] === [2024-06-04 14:06:42,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash 827533781, now seen corresponding path program 3 times [2024-06-04 14:06:42,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:42,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043879910] [2024-06-04 14:06:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043879910] [2024-06-04 14:06:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043879910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:42,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:42,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078504555] [2024-06-04 14:06:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:42,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:42,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 247 transitions, 3791 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:42,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:42,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:42,449 INFO L124 PetriNetUnfolderBase]: 1767/2963 cut-off events. [2024-06-04 14:06:42,449 INFO L125 PetriNetUnfolderBase]: For 101935/101943 co-relation queries the response was YES. [2024-06-04 14:06:42,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19958 conditions, 2963 events. 1767/2963 cut-off events. For 101935/101943 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17583 event pairs, 394 based on Foata normal form. 5/2963 useless extension candidates. Maximal degree in co-relation 19874. Up to 2390 conditions per place. [2024-06-04 14:06:42,476 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 93 changer transitions 0/266 dead transitions. [2024-06-04 14:06:42,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 266 transitions, 4585 flow [2024-06-04 14:06:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 14:06:42,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 14:06:42,477 INFO L175 Difference]: Start difference. First operand has 171 places, 247 transitions, 3791 flow. Second operand 6 states and 146 transitions. [2024-06-04 14:06:42,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 266 transitions, 4585 flow [2024-06-04 14:06:42,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4312 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:42,691 INFO L231 Difference]: Finished difference. Result has 173 places, 247 transitions, 3711 flow [2024-06-04 14:06:42,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3711, PETRI_PLACES=173, PETRI_TRANSITIONS=247} [2024-06-04 14:06:42,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-04 14:06:42,692 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 247 transitions, 3711 flow [2024-06-04 14:06:42,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:42,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:42,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:06:42,692 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)] === [2024-06-04 14:06:42,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash 347586797, now seen corresponding path program 4 times [2024-06-04 14:06:42,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:42,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002865445] [2024-06-04 14:06:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:42,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:42,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002865445] [2024-06-04 14:06:42,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002865445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:42,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:42,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:42,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263938536] [2024-06-04 14:06:42,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:42,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:42,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:42,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 247 transitions, 3711 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:42,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:42,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:43,283 INFO L124 PetriNetUnfolderBase]: 1751/2950 cut-off events. [2024-06-04 14:06:43,284 INFO L125 PetriNetUnfolderBase]: For 100608/100608 co-relation queries the response was YES. [2024-06-04 14:06:43,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19506 conditions, 2950 events. 1751/2950 cut-off events. For 100608/100608 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17526 event pairs, 351 based on Foata normal form. 4/2953 useless extension candidates. Maximal degree in co-relation 19421. Up to 2643 conditions per place. [2024-06-04 14:06:43,314 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 37 changer transitions 0/262 dead transitions. [2024-06-04 14:06:43,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 4267 flow [2024-06-04 14:06:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-04 14:06:43,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 14:06:43,315 INFO L175 Difference]: Start difference. First operand has 173 places, 247 transitions, 3711 flow. Second operand 7 states and 154 transitions. [2024-06-04 14:06:43,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 4267 flow [2024-06-04 14:06:43,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 262 transitions, 3915 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 14:06:43,552 INFO L231 Difference]: Finished difference. Result has 172 places, 247 transitions, 3448 flow [2024-06-04 14:06:43,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=172, PETRI_TRANSITIONS=247} [2024-06-04 14:06:43,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-04 14:06:43,553 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 247 transitions, 3448 flow [2024-06-04 14:06:43,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:43,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:43,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:06:43,553 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)] === [2024-06-04 14:06:43,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1876861209, now seen corresponding path program 5 times [2024-06-04 14:06:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:43,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616328844] [2024-06-04 14:06:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:43,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:43,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616328844] [2024-06-04 14:06:43,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616328844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:43,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:43,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:43,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438903275] [2024-06-04 14:06:43,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:43,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:43,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:43,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:43,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 247 transitions, 3448 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:43,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:43,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:44,022 INFO L124 PetriNetUnfolderBase]: 1743/2936 cut-off events. [2024-06-04 14:06:44,023 INFO L125 PetriNetUnfolderBase]: For 100749/100751 co-relation queries the response was YES. [2024-06-04 14:06:44,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18889 conditions, 2936 events. 1743/2936 cut-off events. For 100749/100751 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17388 event pairs, 359 based on Foata normal form. 6/2941 useless extension candidates. Maximal degree in co-relation 18805. Up to 2381 conditions per place. [2024-06-04 14:06:44,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 95 changer transitions 0/274 dead transitions. [2024-06-04 14:06:44,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 4274 flow [2024-06-04 14:06:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:06:44,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-04 14:06:44,050 INFO L175 Difference]: Start difference. First operand has 172 places, 247 transitions, 3448 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:06:44,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 4274 flow [2024-06-04 14:06:44,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 274 transitions, 4195 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:44,260 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 3651 flow [2024-06-04 14:06:44,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3651, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2024-06-04 14:06:44,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-04 14:06:44,260 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 3651 flow [2024-06-04 14:06:44,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:44,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:44,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:44,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:06:44,261 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)] === [2024-06-04 14:06:44,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1877068599, now seen corresponding path program 6 times [2024-06-04 14:06:44,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:44,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144984047] [2024-06-04 14:06:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:44,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144984047] [2024-06-04 14:06:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144984047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:44,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:44,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166901167] [2024-06-04 14:06:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:44,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:44,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 3651 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:44,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:44,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:44,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:44,783 INFO L124 PetriNetUnfolderBase]: 1719/2897 cut-off events. [2024-06-04 14:06:44,783 INFO L125 PetriNetUnfolderBase]: For 101937/101937 co-relation queries the response was YES. [2024-06-04 14:06:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18812 conditions, 2897 events. 1719/2897 cut-off events. For 101937/101937 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17192 event pairs, 351 based on Foata normal form. 4/2900 useless extension candidates. Maximal degree in co-relation 18727. Up to 2361 conditions per place. [2024-06-04 14:06:44,810 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 169 selfloop transitions, 102 changer transitions 0/277 dead transitions. [2024-06-04 14:06:44,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 277 transitions, 4343 flow [2024-06-04 14:06:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:06:44,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 14:06:44,811 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 3651 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:06:44,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 277 transitions, 4343 flow [2024-06-04 14:06:45,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 277 transitions, 4147 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:45,025 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 3693 flow [2024-06-04 14:06:45,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3693, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-04 14:06:45,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-04 14:06:45,026 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 3693 flow [2024-06-04 14:06:45,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:45,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:45,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:45,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:06:45,027 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)] === [2024-06-04 14:06:45,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1871362212, now seen corresponding path program 4 times [2024-06-04 14:06:45,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:45,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723571042] [2024-06-04 14:06:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:45,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:45,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723571042] [2024-06-04 14:06:45,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723571042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:45,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:45,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819000026] [2024-06-04 14:06:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:45,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:45,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:45,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:45,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 3693 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:45,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:45,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:45,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:45,577 INFO L124 PetriNetUnfolderBase]: 1794/3025 cut-off events. [2024-06-04 14:06:45,578 INFO L125 PetriNetUnfolderBase]: For 107882/107884 co-relation queries the response was YES. [2024-06-04 14:06:45,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19914 conditions, 3025 events. 1794/3025 cut-off events. For 107882/107884 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18091 event pairs, 358 based on Foata normal form. 5/3029 useless extension candidates. Maximal degree in co-relation 19829. Up to 2370 conditions per place. [2024-06-04 14:06:45,604 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 181 selfloop transitions, 108 changer transitions 0/295 dead transitions. [2024-06-04 14:06:45,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 295 transitions, 4923 flow [2024-06-04 14:06:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:06:45,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 14:06:45,606 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 3693 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:06:45,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 295 transitions, 4923 flow [2024-06-04 14:06:45,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 295 transitions, 4613 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 14:06:45,764 INFO L231 Difference]: Finished difference. Result has 176 places, 270 transitions, 4000 flow [2024-06-04 14:06:45,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4000, PETRI_PLACES=176, PETRI_TRANSITIONS=270} [2024-06-04 14:06:45,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-04 14:06:45,765 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 270 transitions, 4000 flow [2024-06-04 14:06:45,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:45,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:45,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:45,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:06:45,765 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)] === [2024-06-04 14:06:45,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:45,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1730975494, now seen corresponding path program 5 times [2024-06-04 14:06:45,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:45,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012667328] [2024-06-04 14:06:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:45,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:45,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:45,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012667328] [2024-06-04 14:06:45,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012667328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:45,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:45,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:45,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472171708] [2024-06-04 14:06:45,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:45,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:45,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 270 transitions, 4000 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:45,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:45,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:45,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:46,276 INFO L124 PetriNetUnfolderBase]: 1785/3012 cut-off events. [2024-06-04 14:06:46,276 INFO L125 PetriNetUnfolderBase]: For 102410/102412 co-relation queries the response was YES. [2024-06-04 14:06:46,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19802 conditions, 3012 events. 1785/3012 cut-off events. For 102410/102412 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18018 event pairs, 358 based on Foata normal form. 5/3016 useless extension candidates. Maximal degree in co-relation 19716. Up to 2363 conditions per place. [2024-06-04 14:06:46,303 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 120 changer transitions 0/301 dead transitions. [2024-06-04 14:06:46,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 301 transitions, 4963 flow [2024-06-04 14:06:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:06:46,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-04 14:06:46,304 INFO L175 Difference]: Start difference. First operand has 176 places, 270 transitions, 4000 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:06:46,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 301 transitions, 4963 flow [2024-06-04 14:06:46,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 301 transitions, 4854 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:46,512 INFO L231 Difference]: Finished difference. Result has 183 places, 271 transitions, 4239 flow [2024-06-04 14:06:46,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4239, PETRI_PLACES=183, PETRI_TRANSITIONS=271} [2024-06-04 14:06:46,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-04 14:06:46,513 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 271 transitions, 4239 flow [2024-06-04 14:06:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:46,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:46,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:46,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:06:46,514 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)] === [2024-06-04 14:06:46,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:46,514 INFO L85 PathProgramCache]: Analyzing trace with hash 838825562, now seen corresponding path program 1 times [2024-06-04 14:06:46,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:46,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258402801] [2024-06-04 14:06:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:46,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:46,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:46,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258402801] [2024-06-04 14:06:46,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258402801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:46,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:46,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427426930] [2024-06-04 14:06:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:46,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:46,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:46,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 271 transitions, 4239 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:46,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:46,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:46,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:47,043 INFO L124 PetriNetUnfolderBase]: 1808/3030 cut-off events. [2024-06-04 14:06:47,043 INFO L125 PetriNetUnfolderBase]: For 112102/112110 co-relation queries the response was YES. [2024-06-04 14:06:47,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20658 conditions, 3030 events. 1808/3030 cut-off events. For 112102/112110 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18073 event pairs, 415 based on Foata normal form. 6/3031 useless extension candidates. Maximal degree in co-relation 20569. Up to 2186 conditions per place. [2024-06-04 14:06:47,071 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 178 changer transitions 0/302 dead transitions. [2024-06-04 14:06:47,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 302 transitions, 5315 flow [2024-06-04 14:06:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:06:47,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 14:06:47,080 INFO L175 Difference]: Start difference. First operand has 183 places, 271 transitions, 4239 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:06:47,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 302 transitions, 5315 flow [2024-06-04 14:06:47,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 302 transitions, 5135 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:47,326 INFO L231 Difference]: Finished difference. Result has 187 places, 282 transitions, 4615 flow [2024-06-04 14:06:47,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4615, PETRI_PLACES=187, PETRI_TRANSITIONS=282} [2024-06-04 14:06:47,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-04 14:06:47,327 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 282 transitions, 4615 flow [2024-06-04 14:06:47,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:47,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:47,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:47,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:06:47,328 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)] === [2024-06-04 14:06:47,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash 821897968, now seen corresponding path program 2 times [2024-06-04 14:06:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665593025] [2024-06-04 14:06:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:47,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665593025] [2024-06-04 14:06:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665593025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:47,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:47,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:47,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024226951] [2024-06-04 14:06:47,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:47,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:47,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:47,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:47,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 282 transitions, 4615 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:47,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:47,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:47,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:47,850 INFO L124 PetriNetUnfolderBase]: 1850/3122 cut-off events. [2024-06-04 14:06:47,850 INFO L125 PetriNetUnfolderBase]: For 119266/119266 co-relation queries the response was YES. [2024-06-04 14:06:47,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21929 conditions, 3122 events. 1850/3122 cut-off events. For 119266/119266 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18806 event pairs, 351 based on Foata normal form. 2/3123 useless extension candidates. Maximal degree in co-relation 21839. Up to 2757 conditions per place. [2024-06-04 14:06:47,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 50 changer transitions 0/314 dead transitions. [2024-06-04 14:06:47,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 314 transitions, 5769 flow [2024-06-04 14:06:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:06:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:06:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 14:06:47,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 14:06:47,882 INFO L175 Difference]: Start difference. First operand has 187 places, 282 transitions, 4615 flow. Second operand 8 states and 174 transitions. [2024-06-04 14:06:47,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 314 transitions, 5769 flow [2024-06-04 14:06:48,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 314 transitions, 5524 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:48,119 INFO L231 Difference]: Finished difference. Result has 194 places, 296 transitions, 4839 flow [2024-06-04 14:06:48,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4839, PETRI_PLACES=194, PETRI_TRANSITIONS=296} [2024-06-04 14:06:48,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 14:06:48,120 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 296 transitions, 4839 flow [2024-06-04 14:06:48,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:48,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:48,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:06:48,121 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)] === [2024-06-04 14:06:48,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1877076690, now seen corresponding path program 3 times [2024-06-04 14:06:48,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:48,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142701421] [2024-06-04 14:06:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:48,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142701421] [2024-06-04 14:06:48,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142701421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:48,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:48,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90911331] [2024-06-04 14:06:48,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:48,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:48,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 296 transitions, 4839 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:48,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:48,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:48,672 INFO L124 PetriNetUnfolderBase]: 1857/3141 cut-off events. [2024-06-04 14:06:48,672 INFO L125 PetriNetUnfolderBase]: For 122687/122687 co-relation queries the response was YES. [2024-06-04 14:06:48,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21769 conditions, 3141 events. 1857/3141 cut-off events. For 122687/122687 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19008 event pairs, 350 based on Foata normal form. 3/3143 useless extension candidates. Maximal degree in co-relation 21676. Up to 2430 conditions per place. [2024-06-04 14:06:48,703 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 146 changer transitions 0/331 dead transitions. [2024-06-04 14:06:48,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 331 transitions, 5919 flow [2024-06-04 14:06:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:06:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:06:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:06:48,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 14:06:48,704 INFO L175 Difference]: Start difference. First operand has 194 places, 296 transitions, 4839 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:06:48,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 331 transitions, 5919 flow [2024-06-04 14:06:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 331 transitions, 5833 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:48,964 INFO L231 Difference]: Finished difference. Result has 198 places, 301 transitions, 5158 flow [2024-06-04 14:06:48,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5158, PETRI_PLACES=198, PETRI_TRANSITIONS=301} [2024-06-04 14:06:48,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-04 14:06:48,965 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 301 transitions, 5158 flow [2024-06-04 14:06:48,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:48,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:48,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:06:48,966 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)] === [2024-06-04 14:06:48,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 811371509, now seen corresponding path program 1 times [2024-06-04 14:06:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901821763] [2024-06-04 14:06:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:49,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:49,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901821763] [2024-06-04 14:06:49,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901821763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:49,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:49,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:49,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885739029] [2024-06-04 14:06:49,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:49,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:49,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:49,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:49,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 301 transitions, 5158 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:49,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:49,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:49,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:49,548 INFO L124 PetriNetUnfolderBase]: 1960/3281 cut-off events. [2024-06-04 14:06:49,548 INFO L125 PetriNetUnfolderBase]: For 149684/149684 co-relation queries the response was YES. [2024-06-04 14:06:49,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23386 conditions, 3281 events. 1960/3281 cut-off events. For 149684/149684 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19744 event pairs, 304 based on Foata normal form. 12/3288 useless extension candidates. Maximal degree in co-relation 23291. Up to 2400 conditions per place. [2024-06-04 14:06:49,580 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 104 changer transitions 0/345 dead transitions. [2024-06-04 14:06:49,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 345 transitions, 6390 flow [2024-06-04 14:06:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:06:49,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 14:06:49,582 INFO L175 Difference]: Start difference. First operand has 198 places, 301 transitions, 5158 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:06:49,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 345 transitions, 6390 flow [2024-06-04 14:06:49,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 345 transitions, 6236 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:49,848 INFO L231 Difference]: Finished difference. Result has 202 places, 307 transitions, 5320 flow [2024-06-04 14:06:49,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5320, PETRI_PLACES=202, PETRI_TRANSITIONS=307} [2024-06-04 14:06:49,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-04 14:06:49,849 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 307 transitions, 5320 flow [2024-06-04 14:06:49,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:49,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:49,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:49,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:06:49,850 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)] === [2024-06-04 14:06:49,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash 591174865, now seen corresponding path program 2 times [2024-06-04 14:06:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:49,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927010486] [2024-06-04 14:06:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:49,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927010486] [2024-06-04 14:06:49,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927010486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:49,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:49,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:49,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488758804] [2024-06-04 14:06:49,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:49,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:49,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:49,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:49,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:49,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:49,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 307 transitions, 5320 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:49,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:49,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:49,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:50,462 INFO L124 PetriNetUnfolderBase]: 2004/3346 cut-off events. [2024-06-04 14:06:50,462 INFO L125 PetriNetUnfolderBase]: For 151726/151726 co-relation queries the response was YES. [2024-06-04 14:06:50,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24198 conditions, 3346 events. 2004/3346 cut-off events. For 151726/151726 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20203 event pairs, 421 based on Foata normal form. 12/3353 useless extension candidates. Maximal degree in co-relation 24101. Up to 2714 conditions per place. [2024-06-04 14:06:50,497 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 99 changer transitions 0/340 dead transitions. [2024-06-04 14:06:50,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 340 transitions, 6386 flow [2024-06-04 14:06:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:06:50,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 14:06:50,498 INFO L175 Difference]: Start difference. First operand has 202 places, 307 transitions, 5320 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:06:50,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 340 transitions, 6386 flow [2024-06-04 14:06:50,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 340 transitions, 6210 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:50,850 INFO L231 Difference]: Finished difference. Result has 206 places, 310 transitions, 5405 flow [2024-06-04 14:06:50,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5405, PETRI_PLACES=206, PETRI_TRANSITIONS=310} [2024-06-04 14:06:50,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-04 14:06:50,850 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 310 transitions, 5405 flow [2024-06-04 14:06:50,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:50,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:50,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:50,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:06:50,851 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)] === [2024-06-04 14:06:50,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1029005665, now seen corresponding path program 1 times [2024-06-04 14:06:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:50,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100456513] [2024-06-04 14:06:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:50,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:50,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100456513] [2024-06-04 14:06:50,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100456513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:50,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:50,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225526035] [2024-06-04 14:06:50,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:50,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:50,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 310 transitions, 5405 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:50,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:50,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:50,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:51,431 INFO L124 PetriNetUnfolderBase]: 2030/3386 cut-off events. [2024-06-04 14:06:51,431 INFO L125 PetriNetUnfolderBase]: For 149940/149940 co-relation queries the response was YES. [2024-06-04 14:06:51,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24930 conditions, 3386 events. 2030/3386 cut-off events. For 149940/149940 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20462 event pairs, 441 based on Foata normal form. 2/3383 useless extension candidates. Maximal degree in co-relation 24831. Up to 2460 conditions per place. [2024-06-04 14:06:51,464 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 191 changer transitions 0/343 dead transitions. [2024-06-04 14:06:51,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 343 transitions, 6600 flow [2024-06-04 14:06:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:06:51,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 14:06:51,465 INFO L175 Difference]: Start difference. First operand has 206 places, 310 transitions, 5405 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:06:51,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 343 transitions, 6600 flow [2024-06-04 14:06:51,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 343 transitions, 6387 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:51,779 INFO L231 Difference]: Finished difference. Result has 209 places, 320 transitions, 5818 flow [2024-06-04 14:06:51,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5192, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5818, PETRI_PLACES=209, PETRI_TRANSITIONS=320} [2024-06-04 14:06:51,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-04 14:06:51,780 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 320 transitions, 5818 flow [2024-06-04 14:06:51,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:51,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:51,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:51,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:06:51,781 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)] === [2024-06-04 14:06:51,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:51,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1054695911, now seen corresponding path program 1 times [2024-06-04 14:06:51,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:51,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507960635] [2024-06-04 14:06:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:51,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507960635] [2024-06-04 14:06:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507960635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:51,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:51,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257742673] [2024-06-04 14:06:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:51,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:51,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 320 transitions, 5818 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:51,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:51,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:52,433 INFO L124 PetriNetUnfolderBase]: 2040/3403 cut-off events. [2024-06-04 14:06:52,433 INFO L125 PetriNetUnfolderBase]: For 157491/157491 co-relation queries the response was YES. [2024-06-04 14:06:52,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25539 conditions, 3403 events. 2040/3403 cut-off events. For 157491/157491 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20561 event pairs, 418 based on Foata normal form. 2/3400 useless extension candidates. Maximal degree in co-relation 25438. Up to 2804 conditions per place. [2024-06-04 14:06:52,477 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/346 dead transitions. [2024-06-04 14:06:52,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 346 transitions, 6808 flow [2024-06-04 14:06:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:06:52,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 14:06:52,479 INFO L175 Difference]: Start difference. First operand has 209 places, 320 transitions, 5818 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:06:52,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 346 transitions, 6808 flow [2024-06-04 14:06:52,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 346 transitions, 6551 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:52,851 INFO L231 Difference]: Finished difference. Result has 213 places, 324 transitions, 5832 flow [2024-06-04 14:06:52,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5832, PETRI_PLACES=213, PETRI_TRANSITIONS=324} [2024-06-04 14:06:52,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-04 14:06:52,852 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 324 transitions, 5832 flow [2024-06-04 14:06:52,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:52,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:52,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:06:52,853 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)] === [2024-06-04 14:06:52,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash 705702133, now seen corresponding path program 2 times [2024-06-04 14:06:52,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:52,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946225328] [2024-06-04 14:06:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:52,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:52,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946225328] [2024-06-04 14:06:52,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946225328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:52,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:52,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:52,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283309693] [2024-06-04 14:06:52,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:52,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:52,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:52,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:52,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:52,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 324 transitions, 5832 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:52,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:52,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:52,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:53,465 INFO L124 PetriNetUnfolderBase]: 2050/3419 cut-off events. [2024-06-04 14:06:53,465 INFO L125 PetriNetUnfolderBase]: For 163620/163620 co-relation queries the response was YES. [2024-06-04 14:06:53,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25515 conditions, 3419 events. 2050/3419 cut-off events. For 163620/163620 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20698 event pairs, 442 based on Foata normal form. 2/3416 useless extension candidates. Maximal degree in co-relation 25413. Up to 2472 conditions per place. [2024-06-04 14:06:53,507 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 185 changer transitions 0/348 dead transitions. [2024-06-04 14:06:53,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 348 transitions, 6920 flow [2024-06-04 14:06:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 14:06:53,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 14:06:53,509 INFO L175 Difference]: Start difference. First operand has 213 places, 324 transitions, 5832 flow. Second operand 7 states and 169 transitions. [2024-06-04 14:06:53,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 348 transitions, 6920 flow [2024-06-04 14:06:53,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 348 transitions, 6708 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:53,870 INFO L231 Difference]: Finished difference. Result has 215 places, 328 transitions, 6076 flow [2024-06-04 14:06:53,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6076, PETRI_PLACES=215, PETRI_TRANSITIONS=328} [2024-06-04 14:06:53,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-04 14:06:53,871 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 328 transitions, 6076 flow [2024-06-04 14:06:53,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:53,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:53,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:53,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:06:53,877 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)] === [2024-06-04 14:06:53,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:53,877 INFO L85 PathProgramCache]: Analyzing trace with hash 878185513, now seen corresponding path program 3 times [2024-06-04 14:06:53,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144365457] [2024-06-04 14:06:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:53,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:53,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144365457] [2024-06-04 14:06:53,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144365457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:53,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:53,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:53,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299487104] [2024-06-04 14:06:53,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:53,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:53,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:53,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:54,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:54,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 328 transitions, 6076 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:54,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:54,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:54,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:54,491 INFO L124 PetriNetUnfolderBase]: 2044/3413 cut-off events. [2024-06-04 14:06:54,492 INFO L125 PetriNetUnfolderBase]: For 168956/168956 co-relation queries the response was YES. [2024-06-04 14:06:54,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25791 conditions, 3413 events. 2044/3413 cut-off events. For 168956/168956 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20667 event pairs, 442 based on Foata normal form. 2/3410 useless extension candidates. Maximal degree in co-relation 25688. Up to 2469 conditions per place. [2024-06-04 14:06:54,528 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 185 changer transitions 0/348 dead transitions. [2024-06-04 14:06:54,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 348 transitions, 7096 flow [2024-06-04 14:06:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 14:06:54,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 14:06:54,529 INFO L175 Difference]: Start difference. First operand has 215 places, 328 transitions, 6076 flow. Second operand 7 states and 169 transitions. [2024-06-04 14:06:54,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 348 transitions, 7096 flow [2024-06-04 14:06:54,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 348 transitions, 6741 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:54,928 INFO L231 Difference]: Finished difference. Result has 218 places, 328 transitions, 6098 flow [2024-06-04 14:06:54,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6098, PETRI_PLACES=218, PETRI_TRANSITIONS=328} [2024-06-04 14:06:54,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-04 14:06:54,929 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 328 transitions, 6098 flow [2024-06-04 14:06:54,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:54,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:54,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:54,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:06:54,929 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)] === [2024-06-04 14:06:54,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash 141413913, now seen corresponding path program 2 times [2024-06-04 14:06:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:54,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174725747] [2024-06-04 14:06:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:54,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174725747] [2024-06-04 14:06:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174725747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:55,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:55,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051637171] [2024-06-04 14:06:55,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:55,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:55,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:55,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:55,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:55,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 328 transitions, 6098 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:55,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:55,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:55,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:55,602 INFO L124 PetriNetUnfolderBase]: 2054/3435 cut-off events. [2024-06-04 14:06:55,603 INFO L125 PetriNetUnfolderBase]: For 174920/174920 co-relation queries the response was YES. [2024-06-04 14:06:55,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26046 conditions, 3435 events. 2054/3435 cut-off events. For 174920/174920 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 20860 event pairs, 416 based on Foata normal form. 2/3432 useless extension candidates. Maximal degree in co-relation 25942. Up to 2820 conditions per place. [2024-06-04 14:06:55,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 96 changer transitions 0/355 dead transitions. [2024-06-04 14:06:55,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 355 transitions, 7244 flow [2024-06-04 14:06:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:06:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:06:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 14:06:55,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-04 14:06:55,639 INFO L175 Difference]: Start difference. First operand has 218 places, 328 transitions, 6098 flow. Second operand 8 states and 183 transitions. [2024-06-04 14:06:55,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 355 transitions, 7244 flow [2024-06-04 14:06:55,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 355 transitions, 6888 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:56,002 INFO L231 Difference]: Finished difference. Result has 222 places, 334 transitions, 6047 flow [2024-06-04 14:06:56,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6047, PETRI_PLACES=222, PETRI_TRANSITIONS=334} [2024-06-04 14:06:56,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-04 14:06:56,003 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 334 transitions, 6047 flow [2024-06-04 14:06:56,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:56,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:56,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:56,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:06:56,004 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)] === [2024-06-04 14:06:56,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1106829719, now seen corresponding path program 3 times [2024-06-04 14:06:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:56,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441716123] [2024-06-04 14:06:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:56,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:56,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441716123] [2024-06-04 14:06:56,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441716123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:56,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:56,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:56,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474046733] [2024-06-04 14:06:56,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:56,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:56,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:56,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:56,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 334 transitions, 6047 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:56,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:56,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:56,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:56,637 INFO L124 PetriNetUnfolderBase]: 2098/3497 cut-off events. [2024-06-04 14:06:56,637 INFO L125 PetriNetUnfolderBase]: For 192220/192220 co-relation queries the response was YES. [2024-06-04 14:06:56,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26143 conditions, 3497 events. 2098/3497 cut-off events. For 192220/192220 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21247 event pairs, 426 based on Foata normal form. 12/3504 useless extension candidates. Maximal degree in co-relation 26038. Up to 2844 conditions per place. [2024-06-04 14:06:56,676 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 99 changer transitions 0/360 dead transitions. [2024-06-04 14:06:56,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 360 transitions, 7069 flow [2024-06-04 14:06:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 14:06:56,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 14:06:56,677 INFO L175 Difference]: Start difference. First operand has 222 places, 334 transitions, 6047 flow. Second operand 7 states and 168 transitions. [2024-06-04 14:06:56,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 360 transitions, 7069 flow [2024-06-04 14:06:57,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 360 transitions, 6929 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:57,123 INFO L231 Difference]: Finished difference. Result has 226 places, 337 transitions, 6166 flow [2024-06-04 14:06:57,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6166, PETRI_PLACES=226, PETRI_TRANSITIONS=337} [2024-06-04 14:06:57,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-04 14:06:57,123 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 337 transitions, 6166 flow [2024-06-04 14:06:57,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:57,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:57,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:57,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:06:57,124 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)] === [2024-06-04 14:06:57,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1107199115, now seen corresponding path program 1 times [2024-06-04 14:06:57,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:57,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835659762] [2024-06-04 14:06:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:57,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:57,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:57,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835659762] [2024-06-04 14:06:57,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835659762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:57,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118961854] [2024-06-04 14:06:57,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:57,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:57,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:57,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 337 transitions, 6166 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:57,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:57,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:57,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:57,737 INFO L124 PetriNetUnfolderBase]: 2106/3522 cut-off events. [2024-06-04 14:06:57,738 INFO L125 PetriNetUnfolderBase]: For 185976/185976 co-relation queries the response was YES. [2024-06-04 14:06:57,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26518 conditions, 3522 events. 2106/3522 cut-off events. For 185976/185976 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21414 event pairs, 388 based on Foata normal form. 2/3523 useless extension candidates. Maximal degree in co-relation 26411. Up to 3176 conditions per place. [2024-06-04 14:06:57,774 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 324 selfloop transitions, 27 changer transitions 0/357 dead transitions. [2024-06-04 14:06:57,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 357 transitions, 6960 flow [2024-06-04 14:06:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-04 14:06:57,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-04 14:06:57,775 INFO L175 Difference]: Start difference. First operand has 226 places, 337 transitions, 6166 flow. Second operand 7 states and 152 transitions. [2024-06-04 14:06:57,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 357 transitions, 6960 flow [2024-06-04 14:06:58,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 357 transitions, 6741 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:58,137 INFO L231 Difference]: Finished difference. Result has 228 places, 339 transitions, 6058 flow [2024-06-04 14:06:58,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5947, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6058, PETRI_PLACES=228, PETRI_TRANSITIONS=339} [2024-06-04 14:06:58,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-04 14:06:58,138 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 339 transitions, 6058 flow [2024-06-04 14:06:58,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:58,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:58,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:58,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:06:58,138 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)] === [2024-06-04 14:06:58,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1259812291, now seen corresponding path program 3 times [2024-06-04 14:06:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:58,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164252066] [2024-06-04 14:06:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:58,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:58,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:58,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164252066] [2024-06-04 14:06:58,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164252066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:58,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440137053] [2024-06-04 14:06:58,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:58,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:58,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:58,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 339 transitions, 6058 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:58,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:58,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:58,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:58,860 INFO L124 PetriNetUnfolderBase]: 2103/3505 cut-off events. [2024-06-04 14:06:58,860 INFO L125 PetriNetUnfolderBase]: For 191174/191182 co-relation queries the response was YES. [2024-06-04 14:06:58,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 3505 events. 2103/3505 cut-off events. For 191174/191182 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21311 event pairs, 422 based on Foata normal form. 4/3504 useless extension candidates. Maximal degree in co-relation 26124. Up to 2898 conditions per place. [2024-06-04 14:06:58,895 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 103 changer transitions 0/358 dead transitions. [2024-06-04 14:06:58,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 358 transitions, 7016 flow [2024-06-04 14:06:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 14:06:58,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-04 14:06:58,897 INFO L175 Difference]: Start difference. First operand has 228 places, 339 transitions, 6058 flow. Second operand 7 states and 162 transitions. [2024-06-04 14:06:58,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 358 transitions, 7016 flow [2024-06-04 14:06:59,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 358 transitions, 6913 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:59,268 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 6167 flow [2024-06-04 14:06:59,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6167, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-04 14:06:59,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-04 14:06:59,269 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 6167 flow [2024-06-04 14:06:59,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:59,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:59,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:59,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:06:59,270 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)] === [2024-06-04 14:06:59,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash -295448249, now seen corresponding path program 4 times [2024-06-04 14:06:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:59,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918106025] [2024-06-04 14:06:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:59,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:59,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918106025] [2024-06-04 14:06:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918106025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:59,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:59,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:59,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095440683] [2024-06-04 14:06:59,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:59,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:59,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:59,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:06:59,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 6167 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:59,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:59,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:06:59,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:59,969 INFO L124 PetriNetUnfolderBase]: 2100/3497 cut-off events. [2024-06-04 14:06:59,970 INFO L125 PetriNetUnfolderBase]: For 197107/197115 co-relation queries the response was YES. [2024-06-04 14:06:59,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 3497 events. 2100/3497 cut-off events. For 197107/197115 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21211 event pairs, 428 based on Foata normal form. 4/3496 useless extension candidates. Maximal degree in co-relation 26360. Up to 2896 conditions per place. [2024-06-04 14:07:00,006 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 107 changer transitions 0/357 dead transitions. [2024-06-04 14:07:00,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 357 transitions, 7019 flow [2024-06-04 14:07:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 14:07:00,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 14:07:00,007 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 6167 flow. Second operand 7 states and 163 transitions. [2024-06-04 14:07:00,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 357 transitions, 7019 flow [2024-06-04 14:07:00,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 357 transitions, 6793 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:00,408 INFO L231 Difference]: Finished difference. Result has 232 places, 339 transitions, 6161 flow [2024-06-04 14:07:00,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5941, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6161, PETRI_PLACES=232, PETRI_TRANSITIONS=339} [2024-06-04 14:07:00,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-04 14:07:00,409 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 339 transitions, 6161 flow [2024-06-04 14:07:00,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:00,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:00,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:00,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:07:00,410 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)] === [2024-06-04 14:07:00,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:00,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1259812477, now seen corresponding path program 4 times [2024-06-04 14:07:00,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:00,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579099615] [2024-06-04 14:07:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:00,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:00,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579099615] [2024-06-04 14:07:00,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579099615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:00,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450499004] [2024-06-04 14:07:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:00,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:00,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:00,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 339 transitions, 6161 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:00,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:00,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:00,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:01,112 INFO L124 PetriNetUnfolderBase]: 2090/3478 cut-off events. [2024-06-04 14:07:01,112 INFO L125 PetriNetUnfolderBase]: For 202600/202608 co-relation queries the response was YES. [2024-06-04 14:07:01,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26392 conditions, 3478 events. 2090/3478 cut-off events. For 202600/202608 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21079 event pairs, 453 based on Foata normal form. 5/3478 useless extension candidates. Maximal degree in co-relation 26282. Up to 2545 conditions per place. [2024-06-04 14:07:01,158 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 209 changer transitions 0/359 dead transitions. [2024-06-04 14:07:01,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 359 transitions, 7239 flow [2024-06-04 14:07:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:07:01,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 14:07:01,159 INFO L175 Difference]: Start difference. First operand has 232 places, 339 transitions, 6161 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:07:01,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 359 transitions, 7239 flow [2024-06-04 14:07:01,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 359 transitions, 6997 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:01,609 INFO L231 Difference]: Finished difference. Result has 235 places, 339 transitions, 6350 flow [2024-06-04 14:07:01,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5925, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6350, PETRI_PLACES=235, PETRI_TRANSITIONS=339} [2024-06-04 14:07:01,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-04 14:07:01,610 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 339 transitions, 6350 flow [2024-06-04 14:07:01,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:01,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:01,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:01,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:07:01,611 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)] === [2024-06-04 14:07:01,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:01,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1269989467, now seen corresponding path program 5 times [2024-06-04 14:07:01,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:01,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234011053] [2024-06-04 14:07:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:01,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234011053] [2024-06-04 14:07:01,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234011053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:01,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:01,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:01,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969508251] [2024-06-04 14:07:01,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:01,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:01,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:01,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:01,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 339 transitions, 6350 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:01,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:01,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:01,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:02,262 INFO L124 PetriNetUnfolderBase]: 2084/3488 cut-off events. [2024-06-04 14:07:02,262 INFO L125 PetriNetUnfolderBase]: For 196519/196519 co-relation queries the response was YES. [2024-06-04 14:07:02,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26457 conditions, 3488 events. 2084/3488 cut-off events. For 196519/196519 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21211 event pairs, 385 based on Foata normal form. 2/3489 useless extension candidates. Maximal degree in co-relation 26346. Up to 3115 conditions per place. [2024-06-04 14:07:02,300 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 50 changer transitions 0/357 dead transitions. [2024-06-04 14:07:02,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 357 transitions, 7319 flow [2024-06-04 14:07:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 14:07:02,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 14:07:02,301 INFO L175 Difference]: Start difference. First operand has 235 places, 339 transitions, 6350 flow. Second operand 8 states and 174 transitions. [2024-06-04 14:07:02,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 357 transitions, 7319 flow [2024-06-04 14:07:02,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 357 transitions, 6381 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-04 14:07:02,757 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 5519 flow [2024-06-04 14:07:02,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5412, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5519, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-04 14:07:02,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-04 14:07:02,758 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 5519 flow [2024-06-04 14:07:02,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:02,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:02,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:02,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:07:02,758 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)] === [2024-06-04 14:07:02,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2117308919, now seen corresponding path program 6 times [2024-06-04 14:07:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:02,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998923435] [2024-06-04 14:07:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:02,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:02,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:02,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998923435] [2024-06-04 14:07:02,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998923435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:02,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:02,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:02,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982726221] [2024-06-04 14:07:02,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:02,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:02,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:02,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:02,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 5519 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:02,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:02,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:02,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:03,444 INFO L124 PetriNetUnfolderBase]: 2094/3509 cut-off events. [2024-06-04 14:07:03,444 INFO L125 PetriNetUnfolderBase]: For 196033/196035 co-relation queries the response was YES. [2024-06-04 14:07:03,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25685 conditions, 3509 events. 2094/3509 cut-off events. For 196033/196035 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21401 event pairs, 392 based on Foata normal form. 4/3512 useless extension candidates. Maximal degree in co-relation 25575. Up to 2778 conditions per place. [2024-06-04 14:07:03,480 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 130 changer transitions 0/366 dead transitions. [2024-06-04 14:07:03,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 366 transitions, 6700 flow [2024-06-04 14:07:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:07:03,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 14:07:03,481 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 5519 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:07:03,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 366 transitions, 6700 flow [2024-06-04 14:07:03,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 366 transitions, 6582 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:03,938 INFO L231 Difference]: Finished difference. Result has 232 places, 343 transitions, 5747 flow [2024-06-04 14:07:03,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5747, PETRI_PLACES=232, PETRI_TRANSITIONS=343} [2024-06-04 14:07:03,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-04 14:07:03,938 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 343 transitions, 5747 flow [2024-06-04 14:07:03,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:03,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:03,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:03,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:07:03,939 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)] === [2024-06-04 14:07:03,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:03,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2117546069, now seen corresponding path program 7 times [2024-06-04 14:07:03,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:03,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339405947] [2024-06-04 14:07:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:04,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:04,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339405947] [2024-06-04 14:07:04,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339405947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:04,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:04,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:04,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282150580] [2024-06-04 14:07:04,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:04,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:04,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:04,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:04,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 343 transitions, 5747 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:04,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:04,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:04,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:04,584 INFO L124 PetriNetUnfolderBase]: 2088/3502 cut-off events. [2024-06-04 14:07:04,584 INFO L125 PetriNetUnfolderBase]: For 201104/201106 co-relation queries the response was YES. [2024-06-04 14:07:04,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25927 conditions, 3502 events. 2088/3502 cut-off events. For 201104/201106 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21400 event pairs, 392 based on Foata normal form. 4/3505 useless extension candidates. Maximal degree in co-relation 25816. Up to 2775 conditions per place. [2024-06-04 14:07:04,622 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 136 changer transitions 0/368 dead transitions. [2024-06-04 14:07:04,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 368 transitions, 6757 flow [2024-06-04 14:07:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:07:04,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 14:07:04,623 INFO L175 Difference]: Start difference. First operand has 232 places, 343 transitions, 5747 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:07:04,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 368 transitions, 6757 flow [2024-06-04 14:07:05,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 368 transitions, 6483 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:05,160 INFO L231 Difference]: Finished difference. Result has 235 places, 343 transitions, 5752 flow [2024-06-04 14:07:05,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5473, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5752, PETRI_PLACES=235, PETRI_TRANSITIONS=343} [2024-06-04 14:07:05,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-04 14:07:05,161 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 343 transitions, 5752 flow [2024-06-04 14:07:05,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:05,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:05,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:05,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:07:05,162 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)] === [2024-06-04 14:07:05,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1940414549, now seen corresponding path program 8 times [2024-06-04 14:07:05,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:05,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937272256] [2024-06-04 14:07:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:05,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:05,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:05,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937272256] [2024-06-04 14:07:05,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937272256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:05,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:05,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048539417] [2024-06-04 14:07:05,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:05,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:05,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:05,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:05,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 343 transitions, 5752 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:05,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:05,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:05,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:05,822 INFO L124 PetriNetUnfolderBase]: 2078/3485 cut-off events. [2024-06-04 14:07:05,822 INFO L125 PetriNetUnfolderBase]: For 203311/203311 co-relation queries the response was YES. [2024-06-04 14:07:05,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25770 conditions, 3485 events. 2078/3485 cut-off events. For 203311/203311 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21259 event pairs, 383 based on Foata normal form. 2/3486 useless extension candidates. Maximal degree in co-relation 25658. Up to 2767 conditions per place. [2024-06-04 14:07:05,859 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 148 changer transitions 0/373 dead transitions. [2024-06-04 14:07:05,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 373 transitions, 6902 flow [2024-06-04 14:07:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 14:07:05,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 14:07:05,860 INFO L175 Difference]: Start difference. First operand has 235 places, 343 transitions, 5752 flow. Second operand 8 states and 195 transitions. [2024-06-04 14:07:05,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 373 transitions, 6902 flow [2024-06-04 14:07:06,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 373 transitions, 6640 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:06,335 INFO L231 Difference]: Finished difference. Result has 238 places, 343 transitions, 5798 flow [2024-06-04 14:07:06,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=238, PETRI_TRANSITIONS=343} [2024-06-04 14:07:06,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-04 14:07:06,335 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 343 transitions, 5798 flow [2024-06-04 14:07:06,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:06,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:06,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:06,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:07:06,336 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)] === [2024-06-04 14:07:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2117669387, now seen corresponding path program 4 times [2024-06-04 14:07:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:06,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129812493] [2024-06-04 14:07:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:06,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:06,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129812493] [2024-06-04 14:07:06,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129812493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:06,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:06,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341667944] [2024-06-04 14:07:06,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:06,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:06,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 343 transitions, 5798 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:06,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:06,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:06,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:07,056 INFO L124 PetriNetUnfolderBase]: 2228/3731 cut-off events. [2024-06-04 14:07:07,056 INFO L125 PetriNetUnfolderBase]: For 294720/294722 co-relation queries the response was YES. [2024-06-04 14:07:07,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26768 conditions, 3731 events. 2228/3731 cut-off events. For 294720/294722 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22955 event pairs, 326 based on Foata normal form. 56/3786 useless extension candidates. Maximal degree in co-relation 26655. Up to 2754 conditions per place. [2024-06-04 14:07:07,101 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 107 changer transitions 1/382 dead transitions. [2024-06-04 14:07:07,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 382 transitions, 6830 flow [2024-06-04 14:07:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 14:07:07,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-04 14:07:07,102 INFO L175 Difference]: Start difference. First operand has 238 places, 343 transitions, 5798 flow. Second operand 7 states and 184 transitions. [2024-06-04 14:07:07,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 382 transitions, 6830 flow [2024-06-04 14:07:07,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 382 transitions, 6367 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:07,650 INFO L231 Difference]: Finished difference. Result has 235 places, 345 transitions, 5607 flow [2024-06-04 14:07:07,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5607, PETRI_PLACES=235, PETRI_TRANSITIONS=345} [2024-06-04 14:07:07,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-04 14:07:07,651 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 345 transitions, 5607 flow [2024-06-04 14:07:07,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:07,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:07,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:07,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:07:07,651 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)] === [2024-06-04 14:07:07,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:07,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2117299991, now seen corresponding path program 2 times [2024-06-04 14:07:07,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:07,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46703373] [2024-06-04 14:07:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:07,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:07,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46703373] [2024-06-04 14:07:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46703373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:07,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018093468] [2024-06-04 14:07:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:07,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:07,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 345 transitions, 5607 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:07,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:07,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:07,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:08,352 INFO L124 PetriNetUnfolderBase]: 2226/3728 cut-off events. [2024-06-04 14:07:08,352 INFO L125 PetriNetUnfolderBase]: For 205472/205472 co-relation queries the response was YES. [2024-06-04 14:07:08,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26855 conditions, 3728 events. 2226/3728 cut-off events. For 205472/205472 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22925 event pairs, 430 based on Foata normal form. 2/3729 useless extension candidates. Maximal degree in co-relation 26742. Up to 3388 conditions per place. [2024-06-04 14:07:08,391 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 336 selfloop transitions, 22 changer transitions 0/364 dead transitions. [2024-06-04 14:07:08,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 364 transitions, 6417 flow [2024-06-04 14:07:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-04 14:07:08,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 14:07:08,393 INFO L175 Difference]: Start difference. First operand has 235 places, 345 transitions, 5607 flow. Second operand 6 states and 135 transitions. [2024-06-04 14:07:08,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 364 transitions, 6417 flow [2024-06-04 14:07:08,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 364 transitions, 6175 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:08,944 INFO L231 Difference]: Finished difference. Result has 236 places, 347 transitions, 5470 flow [2024-06-04 14:07:08,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5470, PETRI_PLACES=236, PETRI_TRANSITIONS=347} [2024-06-04 14:07:08,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-04 14:07:08,944 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 347 transitions, 5470 flow [2024-06-04 14:07:08,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:08,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:08,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:08,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:07:08,945 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)] === [2024-06-04 14:07:08,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1939271777, now seen corresponding path program 3 times [2024-06-04 14:07:08,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:08,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418704988] [2024-06-04 14:07:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:08,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:09,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:09,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418704988] [2024-06-04 14:07:09,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418704988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:09,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:09,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571117410] [2024-06-04 14:07:09,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:09,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:09,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:09,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:09,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 347 transitions, 5470 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:09,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:09,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:09,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:09,623 INFO L124 PetriNetUnfolderBase]: 2234/3740 cut-off events. [2024-06-04 14:07:09,624 INFO L125 PetriNetUnfolderBase]: For 203327/203327 co-relation queries the response was YES. [2024-06-04 14:07:09,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26411 conditions, 3740 events. 2234/3740 cut-off events. For 203327/203327 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22975 event pairs, 432 based on Foata normal form. 2/3741 useless extension candidates. Maximal degree in co-relation 26297. Up to 3403 conditions per place. [2024-06-04 14:07:09,663 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 19 changer transitions 0/365 dead transitions. [2024-06-04 14:07:09,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 365 transitions, 6282 flow [2024-06-04 14:07:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:07:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:07:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 14:07:09,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 14:07:09,665 INFO L175 Difference]: Start difference. First operand has 236 places, 347 transitions, 5470 flow. Second operand 5 states and 118 transitions. [2024-06-04 14:07:09,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 365 transitions, 6282 flow [2024-06-04 14:07:10,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 365 transitions, 6191 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:10,142 INFO L231 Difference]: Finished difference. Result has 237 places, 349 transitions, 5480 flow [2024-06-04 14:07:10,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5480, PETRI_PLACES=237, PETRI_TRANSITIONS=349} [2024-06-04 14:07:10,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-04 14:07:10,142 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 349 transitions, 5480 flow [2024-06-04 14:07:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:10,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:10,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:10,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:07:10,143 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)] === [2024-06-04 14:07:10,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:10,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1939689347, now seen corresponding path program 4 times [2024-06-04 14:07:10,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:10,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126765665] [2024-06-04 14:07:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:10,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:10,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:10,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126765665] [2024-06-04 14:07:10,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126765665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:10,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:10,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25744821] [2024-06-04 14:07:10,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:10,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:10,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:10,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 349 transitions, 5480 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:10,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:10,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:10,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:10,812 INFO L124 PetriNetUnfolderBase]: 2229/3733 cut-off events. [2024-06-04 14:07:10,813 INFO L125 PetriNetUnfolderBase]: For 205674/205674 co-relation queries the response was YES. [2024-06-04 14:07:10,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26281 conditions, 3733 events. 2229/3733 cut-off events. For 205674/205674 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22967 event pairs, 429 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 26166. Up to 3382 conditions per place. [2024-06-04 14:07:10,849 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 23 changer transitions 0/369 dead transitions. [2024-06-04 14:07:10,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 369 transitions, 6308 flow [2024-06-04 14:07:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 14:07:10,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 14:07:10,850 INFO L175 Difference]: Start difference. First operand has 237 places, 349 transitions, 5480 flow. Second operand 6 states and 136 transitions. [2024-06-04 14:07:10,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 369 transitions, 6308 flow [2024-06-04 14:07:11,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 369 transitions, 6223 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:11,352 INFO L231 Difference]: Finished difference. Result has 240 places, 351 transitions, 5508 flow [2024-06-04 14:07:11,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5508, PETRI_PLACES=240, PETRI_TRANSITIONS=351} [2024-06-04 14:07:11,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-04 14:07:11,352 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 351 transitions, 5508 flow [2024-06-04 14:07:11,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:11,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:11,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:07:11,353 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)] === [2024-06-04 14:07:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1496173279, now seen corresponding path program 1 times [2024-06-04 14:07:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:11,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438816802] [2024-06-04 14:07:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438816802] [2024-06-04 14:07:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438816802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:11,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:11,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890089443] [2024-06-04 14:07:11,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:11,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:11,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:11,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 351 transitions, 5508 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:11,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:11,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:11,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:12,050 INFO L124 PetriNetUnfolderBase]: 2332/3882 cut-off events. [2024-06-04 14:07:12,051 INFO L125 PetriNetUnfolderBase]: For 251750/251758 co-relation queries the response was YES. [2024-06-04 14:07:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27657 conditions, 3882 events. 2332/3882 cut-off events. For 251750/251758 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23959 event pairs, 414 based on Foata normal form. 15/3892 useless extension candidates. Maximal degree in co-relation 27541. Up to 2990 conditions per place. [2024-06-04 14:07:12,093 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 115 changer transitions 0/387 dead transitions. [2024-06-04 14:07:12,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 387 transitions, 6704 flow [2024-06-04 14:07:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 14:07:12,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-04 14:07:12,094 INFO L175 Difference]: Start difference. First operand has 240 places, 351 transitions, 5508 flow. Second operand 7 states and 174 transitions. [2024-06-04 14:07:12,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 387 transitions, 6704 flow [2024-06-04 14:07:12,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 387 transitions, 6607 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:12,470 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 5753 flow [2024-06-04 14:07:12,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5753, PETRI_PLACES=243, PETRI_TRANSITIONS=357} [2024-06-04 14:07:12,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 14:07:12,470 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 5753 flow [2024-06-04 14:07:12,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:12,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:12,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:07:12,471 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)] === [2024-06-04 14:07:12,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1499030239, now seen corresponding path program 2 times [2024-06-04 14:07:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869638201] [2024-06-04 14:07:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:12,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869638201] [2024-06-04 14:07:12,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869638201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:12,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:12,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:12,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309097739] [2024-06-04 14:07:12,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:12,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:12,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 357 transitions, 5753 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:12,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:12,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:12,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:13,158 INFO L124 PetriNetUnfolderBase]: 2376/3949 cut-off events. [2024-06-04 14:07:13,158 INFO L125 PetriNetUnfolderBase]: For 261336/261344 co-relation queries the response was YES. [2024-06-04 14:07:13,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28581 conditions, 3949 events. 2376/3949 cut-off events. For 261336/261344 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24379 event pairs, 501 based on Foata normal form. 15/3959 useless extension candidates. Maximal degree in co-relation 28464. Up to 3296 conditions per place. [2024-06-04 14:07:13,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 110 changer transitions 0/382 dead transitions. [2024-06-04 14:07:13,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 382 transitions, 6747 flow [2024-06-04 14:07:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:07:13,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 14:07:13,204 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 5753 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:07:13,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 382 transitions, 6747 flow [2024-06-04 14:07:13,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 382 transitions, 6531 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:13,600 INFO L231 Difference]: Finished difference. Result has 247 places, 360 transitions, 5826 flow [2024-06-04 14:07:13,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5826, PETRI_PLACES=247, PETRI_TRANSITIONS=360} [2024-06-04 14:07:13,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-04 14:07:13,601 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 360 transitions, 5826 flow [2024-06-04 14:07:13,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:13,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:13,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:13,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:07:13,601 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)] === [2024-06-04 14:07:13,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash -290970671, now seen corresponding path program 3 times [2024-06-04 14:07:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:13,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119341987] [2024-06-04 14:07:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:13,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:13,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119341987] [2024-06-04 14:07:13,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119341987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:13,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:13,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:13,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501910464] [2024-06-04 14:07:13,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:13,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:13,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:13,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:13,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 360 transitions, 5826 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:13,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:13,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:13,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:14,339 INFO L124 PetriNetUnfolderBase]: 2448/4076 cut-off events. [2024-06-04 14:07:14,339 INFO L125 PetriNetUnfolderBase]: For 282567/282567 co-relation queries the response was YES. [2024-06-04 14:07:14,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29514 conditions, 4076 events. 2448/4076 cut-off events. For 282567/282567 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25305 event pairs, 468 based on Foata normal form. 20/4095 useless extension candidates. Maximal degree in co-relation 29395. Up to 3637 conditions per place. [2024-06-04 14:07:14,381 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 42 changer transitions 0/385 dead transitions. [2024-06-04 14:07:14,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 385 transitions, 6752 flow [2024-06-04 14:07:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 14:07:14,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 14:07:14,382 INFO L175 Difference]: Start difference. First operand has 247 places, 360 transitions, 5826 flow. Second operand 8 states and 175 transitions. [2024-06-04 14:07:14,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 385 transitions, 6752 flow [2024-06-04 14:07:14,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 385 transitions, 6507 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:14,792 INFO L231 Difference]: Finished difference. Result has 250 places, 365 transitions, 5781 flow [2024-06-04 14:07:14,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5781, PETRI_PLACES=250, PETRI_TRANSITIONS=365} [2024-06-04 14:07:14,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-04 14:07:14,793 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 365 transitions, 5781 flow [2024-06-04 14:07:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:14,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:14,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:14,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:07:14,794 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)] === [2024-06-04 14:07:14,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:14,794 INFO L85 PathProgramCache]: Analyzing trace with hash -290785973, now seen corresponding path program 1 times [2024-06-04 14:07:14,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:14,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655049046] [2024-06-04 14:07:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:14,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655049046] [2024-06-04 14:07:14,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655049046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:14,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:14,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:14,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977084634] [2024-06-04 14:07:14,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:14,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:14,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:14,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:14,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 365 transitions, 5781 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:14,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:14,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:14,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:15,501 INFO L124 PetriNetUnfolderBase]: 2456/4090 cut-off events. [2024-06-04 14:07:15,501 INFO L125 PetriNetUnfolderBase]: For 255111/255111 co-relation queries the response was YES. [2024-06-04 14:07:15,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29546 conditions, 4090 events. 2456/4090 cut-off events. For 255111/255111 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25437 event pairs, 468 based on Foata normal form. 2/4091 useless extension candidates. Maximal degree in co-relation 29426. Up to 3743 conditions per place. [2024-06-04 14:07:15,545 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 353 selfloop transitions, 24 changer transitions 0/383 dead transitions. [2024-06-04 14:07:15,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 383 transitions, 6617 flow [2024-06-04 14:07:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-04 14:07:15,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-04 14:07:15,547 INFO L175 Difference]: Start difference. First operand has 250 places, 365 transitions, 5781 flow. Second operand 7 states and 149 transitions. [2024-06-04 14:07:15,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 383 transitions, 6617 flow [2024-06-04 14:07:16,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 383 transitions, 6495 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:16,045 INFO L231 Difference]: Finished difference. Result has 253 places, 368 transitions, 5768 flow [2024-06-04 14:07:16,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5768, PETRI_PLACES=253, PETRI_TRANSITIONS=368} [2024-06-04 14:07:16,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-04 14:07:16,045 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 368 transitions, 5768 flow [2024-06-04 14:07:16,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:16,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:16,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:16,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:07:16,046 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)] === [2024-06-04 14:07:16,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:16,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1940168657, now seen corresponding path program 4 times [2024-06-04 14:07:16,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:16,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172277702] [2024-06-04 14:07:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:16,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:16,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:16,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172277702] [2024-06-04 14:07:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172277702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:16,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382830606] [2024-06-04 14:07:16,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:16,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:16,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:16,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 368 transitions, 5768 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:16,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:16,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:16,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:17,035 INFO L124 PetriNetUnfolderBase]: 2619/4355 cut-off events. [2024-06-04 14:07:17,035 INFO L125 PetriNetUnfolderBase]: For 366717/366717 co-relation queries the response was YES. [2024-06-04 14:07:17,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30541 conditions, 4355 events. 2619/4355 cut-off events. For 366717/366717 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27366 event pairs, 433 based on Foata normal form. 54/4408 useless extension candidates. Maximal degree in co-relation 30419. Up to 3307 conditions per place. [2024-06-04 14:07:17,074 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 116 changer transitions 1/409 dead transitions. [2024-06-04 14:07:17,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 409 transitions, 6904 flow [2024-06-04 14:07:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:07:17,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-04 14:07:17,076 INFO L175 Difference]: Start difference. First operand has 253 places, 368 transitions, 5768 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:07:17,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 409 transitions, 6904 flow [2024-06-04 14:07:17,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 409 transitions, 6821 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:17,570 INFO L231 Difference]: Finished difference. Result has 256 places, 371 transitions, 6018 flow [2024-06-04 14:07:17,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6018, PETRI_PLACES=256, PETRI_TRANSITIONS=371} [2024-06-04 14:07:17,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-04 14:07:17,571 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 371 transitions, 6018 flow [2024-06-04 14:07:17,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:17,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:17,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:17,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:07:17,572 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)] === [2024-06-04 14:07:17,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1939983959, now seen corresponding path program 2 times [2024-06-04 14:07:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:17,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537319036] [2024-06-04 14:07:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:17,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:17,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537319036] [2024-06-04 14:07:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537319036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:17,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917010232] [2024-06-04 14:07:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:17,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:17,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 371 transitions, 6018 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:17,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:17,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:17,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:18,317 INFO L124 PetriNetUnfolderBase]: 2622/4360 cut-off events. [2024-06-04 14:07:18,317 INFO L125 PetriNetUnfolderBase]: For 270209/270209 co-relation queries the response was YES. [2024-06-04 14:07:18,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31410 conditions, 4360 events. 2622/4360 cut-off events. For 270209/270209 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27340 event pairs, 515 based on Foata normal form. 2/4361 useless extension candidates. Maximal degree in co-relation 31287. Up to 4006 conditions per place. [2024-06-04 14:07:18,368 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 355 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-06-04 14:07:18,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 390 transitions, 6910 flow [2024-06-04 14:07:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-04 14:07:18,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 14:07:18,369 INFO L175 Difference]: Start difference. First operand has 256 places, 371 transitions, 6018 flow. Second operand 6 states and 132 transitions. [2024-06-04 14:07:18,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 390 transitions, 6910 flow [2024-06-04 14:07:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 390 transitions, 6630 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:18,949 INFO L231 Difference]: Finished difference. Result has 256 places, 376 transitions, 5898 flow [2024-06-04 14:07:18,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5898, PETRI_PLACES=256, PETRI_TRANSITIONS=376} [2024-06-04 14:07:18,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-04 14:07:18,950 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 376 transitions, 5898 flow [2024-06-04 14:07:18,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:18,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:18,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:18,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:07:18,950 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)] === [2024-06-04 14:07:18,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1712082809, now seen corresponding path program 3 times [2024-06-04 14:07:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:18,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135933193] [2024-06-04 14:07:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:19,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:19,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135933193] [2024-06-04 14:07:19,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135933193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:19,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:19,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:19,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034970553] [2024-06-04 14:07:19,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:19,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:19,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 376 transitions, 5898 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:19,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:19,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:19,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:19,756 INFO L124 PetriNetUnfolderBase]: 2630/4372 cut-off events. [2024-06-04 14:07:19,756 INFO L125 PetriNetUnfolderBase]: For 266275/266275 co-relation queries the response was YES. [2024-06-04 14:07:19,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30782 conditions, 4372 events. 2630/4372 cut-off events. For 266275/266275 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 27379 event pairs, 517 based on Foata normal form. 2/4373 useless extension candidates. Maximal degree in co-relation 30658. Up to 4012 conditions per place. [2024-06-04 14:07:19,804 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 356 selfloop transitions, 29 changer transitions 0/391 dead transitions. [2024-06-04 14:07:19,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 391 transitions, 6742 flow [2024-06-04 14:07:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:07:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:07:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-04 14:07:19,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 14:07:19,805 INFO L175 Difference]: Start difference. First operand has 256 places, 376 transitions, 5898 flow. Second operand 5 states and 115 transitions. [2024-06-04 14:07:19,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 391 transitions, 6742 flow [2024-06-04 14:07:20,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 391 transitions, 6668 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-04 14:07:20,415 INFO L231 Difference]: Finished difference. Result has 259 places, 378 transitions, 5939 flow [2024-06-04 14:07:20,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5939, PETRI_PLACES=259, PETRI_TRANSITIONS=378} [2024-06-04 14:07:20,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-04 14:07:20,415 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 378 transitions, 5939 flow [2024-06-04 14:07:20,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:20,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:20,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:20,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:07:20,416 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)] === [2024-06-04 14:07:20,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1645709259, now seen corresponding path program 4 times [2024-06-04 14:07:20,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:20,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850200905] [2024-06-04 14:07:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:20,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:20,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:20,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850200905] [2024-06-04 14:07:20,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850200905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:20,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:20,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:20,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706817435] [2024-06-04 14:07:20,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:20,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:20,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:20,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:20,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 378 transitions, 5939 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:20,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:20,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:21,149 INFO L124 PetriNetUnfolderBase]: 2625/4358 cut-off events. [2024-06-04 14:07:21,149 INFO L125 PetriNetUnfolderBase]: For 262031/262033 co-relation queries the response was YES. [2024-06-04 14:07:21,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30567 conditions, 4358 events. 2625/4358 cut-off events. For 262031/262033 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 27259 event pairs, 521 based on Foata normal form. 4/4361 useless extension candidates. Maximal degree in co-relation 30442. Up to 3991 conditions per place. [2024-06-04 14:07:21,196 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 355 selfloop transitions, 30 changer transitions 0/391 dead transitions. [2024-06-04 14:07:21,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 6777 flow [2024-06-04 14:07:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:07:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:07:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-04 14:07:21,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-04 14:07:21,197 INFO L175 Difference]: Start difference. First operand has 259 places, 378 transitions, 5939 flow. Second operand 5 states and 112 transitions. [2024-06-04 14:07:21,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 6777 flow [2024-06-04 14:07:21,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 391 transitions, 6688 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:21,861 INFO L231 Difference]: Finished difference. Result has 261 places, 380 transitions, 5961 flow [2024-06-04 14:07:21,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5961, PETRI_PLACES=261, PETRI_TRANSITIONS=380} [2024-06-04 14:07:21,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-04 14:07:21,861 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 380 transitions, 5961 flow [2024-06-04 14:07:21,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:21,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:21,862 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] [2024-06-04 14:07:21,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:07:21,862 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)] === [2024-06-04 14:07:21,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash -617285971, now seen corresponding path program 1 times [2024-06-04 14:07:21,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:21,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466864968] [2024-06-04 14:07:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:21,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:21,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466864968] [2024-06-04 14:07:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466864968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:21,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:21,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:21,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943474298] [2024-06-04 14:07:21,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:21,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:21,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:22,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:22,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 380 transitions, 5961 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:22,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:22,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:22,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:22,836 INFO L124 PetriNetUnfolderBase]: 2939/4872 cut-off events. [2024-06-04 14:07:22,837 INFO L125 PetriNetUnfolderBase]: For 424605/424605 co-relation queries the response was YES. [2024-06-04 14:07:22,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35473 conditions, 4872 events. 2939/4872 cut-off events. For 424605/424605 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30909 event pairs, 576 based on Foata normal form. 36/4903 useless extension candidates. Maximal degree in co-relation 35347. Up to 2682 conditions per place. [2024-06-04 14:07:22,892 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 232 changer transitions 7/431 dead transitions. [2024-06-04 14:07:22,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 431 transitions, 7603 flow [2024-06-04 14:07:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-04 14:07:22,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-04 14:07:22,893 INFO L175 Difference]: Start difference. First operand has 261 places, 380 transitions, 5961 flow. Second operand 8 states and 209 transitions. [2024-06-04 14:07:22,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 431 transitions, 7603 flow [2024-06-04 14:07:23,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 431 transitions, 7512 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:23,706 INFO L231 Difference]: Finished difference. Result has 266 places, 383 transitions, 6420 flow [2024-06-04 14:07:23,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6420, PETRI_PLACES=266, PETRI_TRANSITIONS=383} [2024-06-04 14:07:23,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-04 14:07:23,707 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 383 transitions, 6420 flow [2024-06-04 14:07:23,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:23,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:23,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:07:23,708 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)] === [2024-06-04 14:07:23,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1725449001, now seen corresponding path program 2 times [2024-06-04 14:07:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:23,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952722984] [2024-06-04 14:07:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:23,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:23,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952722984] [2024-06-04 14:07:23,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952722984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:23,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:23,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:23,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959272655] [2024-06-04 14:07:23,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:23,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:23,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:23,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 383 transitions, 6420 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:23,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:23,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:23,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:24,710 INFO L124 PetriNetUnfolderBase]: 3021/5032 cut-off events. [2024-06-04 14:07:24,711 INFO L125 PetriNetUnfolderBase]: For 456169/456169 co-relation queries the response was YES. [2024-06-04 14:07:24,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37245 conditions, 5032 events. 3021/5032 cut-off events. For 456169/456169 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32300 event pairs, 791 based on Foata normal form. 42/5069 useless extension candidates. Maximal degree in co-relation 37118. Up to 3853 conditions per place. [2024-06-04 14:07:24,764 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 217 changer transitions 3/418 dead transitions. [2024-06-04 14:07:24,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 418 transitions, 7798 flow [2024-06-04 14:07:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 14:07:24,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-04 14:07:24,765 INFO L175 Difference]: Start difference. First operand has 266 places, 383 transitions, 6420 flow. Second operand 8 states and 198 transitions. [2024-06-04 14:07:24,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 418 transitions, 7798 flow [2024-06-04 14:07:25,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 418 transitions, 7452 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:25,690 INFO L231 Difference]: Finished difference. Result has 270 places, 384 transitions, 6568 flow [2024-06-04 14:07:25,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=270, PETRI_TRANSITIONS=384} [2024-06-04 14:07:25,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-04 14:07:25,690 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 384 transitions, 6568 flow [2024-06-04 14:07:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:25,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:25,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:25,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:07:25,691 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)] === [2024-06-04 14:07:25,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1146552657, now seen corresponding path program 3 times [2024-06-04 14:07:25,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270383991] [2024-06-04 14:07:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:25,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:25,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270383991] [2024-06-04 14:07:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270383991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:25,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:25,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146573926] [2024-06-04 14:07:25,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:25,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:25,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:25,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:25,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 384 transitions, 6568 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:25,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:25,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:25,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:26,664 INFO L124 PetriNetUnfolderBase]: 3119/5198 cut-off events. [2024-06-04 14:07:26,665 INFO L125 PetriNetUnfolderBase]: For 456317/456317 co-relation queries the response was YES. [2024-06-04 14:07:26,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38501 conditions, 5198 events. 3119/5198 cut-off events. For 456317/456317 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 33604 event pairs, 775 based on Foata normal form. 36/5229 useless extension candidates. Maximal degree in co-relation 38372. Up to 3809 conditions per place. [2024-06-04 14:07:26,723 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 220 changer transitions 6/425 dead transitions. [2024-06-04 14:07:26,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 425 transitions, 8000 flow [2024-06-04 14:07:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:07:26,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-04 14:07:26,724 INFO L175 Difference]: Start difference. First operand has 270 places, 384 transitions, 6568 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:07:26,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 425 transitions, 8000 flow [2024-06-04 14:07:27,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 425 transitions, 7540 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:27,629 INFO L231 Difference]: Finished difference. Result has 272 places, 385 transitions, 6600 flow [2024-06-04 14:07:27,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6108, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6600, PETRI_PLACES=272, PETRI_TRANSITIONS=385} [2024-06-04 14:07:27,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-04 14:07:27,629 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 385 transitions, 6600 flow [2024-06-04 14:07:27,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:27,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:27,630 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] [2024-06-04 14:07:27,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:07:27,630 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)] === [2024-06-04 14:07:27,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:27,630 INFO L85 PathProgramCache]: Analyzing trace with hash -868507827, now seen corresponding path program 1 times [2024-06-04 14:07:27,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:27,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476483557] [2024-06-04 14:07:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:27,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:27,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476483557] [2024-06-04 14:07:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476483557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:27,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:27,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:07:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874670465] [2024-06-04 14:07:27,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:07:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:07:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:07:27,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:27,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 385 transitions, 6600 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:27,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:27,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:27,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:28,490 INFO L124 PetriNetUnfolderBase]: 3118/5212 cut-off events. [2024-06-04 14:07:28,490 INFO L125 PetriNetUnfolderBase]: For 397203/397213 co-relation queries the response was YES. [2024-06-04 14:07:28,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38998 conditions, 5212 events. 3118/5212 cut-off events. For 397203/397213 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33844 event pairs, 830 based on Foata normal form. 6/5216 useless extension candidates. Maximal degree in co-relation 38868. Up to 4538 conditions per place. [2024-06-04 14:07:28,550 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 104 changer transitions 0/416 dead transitions. [2024-06-04 14:07:28,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 416 transitions, 8108 flow [2024-06-04 14:07:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 14:07:28,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 14:07:28,551 INFO L175 Difference]: Start difference. First operand has 272 places, 385 transitions, 6600 flow. Second operand 6 states and 143 transitions. [2024-06-04 14:07:28,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 416 transitions, 8108 flow [2024-06-04 14:07:29,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 416 transitions, 7621 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:29,335 INFO L231 Difference]: Finished difference. Result has 272 places, 397 transitions, 6561 flow [2024-06-04 14:07:29,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6561, PETRI_PLACES=272, PETRI_TRANSITIONS=397} [2024-06-04 14:07:29,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-04 14:07:29,336 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 397 transitions, 6561 flow [2024-06-04 14:07:29,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:29,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:29,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:07:29,336 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)] === [2024-06-04 14:07:29,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash -192841185, now seen corresponding path program 2 times [2024-06-04 14:07:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131456396] [2024-06-04 14:07:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:29,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131456396] [2024-06-04 14:07:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131456396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:29,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:29,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:07:29,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453330310] [2024-06-04 14:07:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:29,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:07:29,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:07:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:07:29,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:29,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 397 transitions, 6561 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:29,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:29,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:29,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:30,296 INFO L124 PetriNetUnfolderBase]: 3115/5206 cut-off events. [2024-06-04 14:07:30,296 INFO L125 PetriNetUnfolderBase]: For 400786/400796 co-relation queries the response was YES. [2024-06-04 14:07:30,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38386 conditions, 5206 events. 3115/5206 cut-off events. For 400786/400796 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33799 event pairs, 831 based on Foata normal form. 6/5210 useless extension candidates. Maximal degree in co-relation 38255. Up to 4535 conditions per place. [2024-06-04 14:07:30,348 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 307 selfloop transitions, 100 changer transitions 0/413 dead transitions. [2024-06-04 14:07:30,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 413 transitions, 7827 flow [2024-06-04 14:07:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 14:07:30,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 14:07:30,349 INFO L175 Difference]: Start difference. First operand has 272 places, 397 transitions, 6561 flow. Second operand 6 states and 141 transitions. [2024-06-04 14:07:30,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 413 transitions, 7827 flow [2024-06-04 14:07:31,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 413 transitions, 7681 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 14:07:31,163 INFO L231 Difference]: Finished difference. Result has 276 places, 397 transitions, 6621 flow [2024-06-04 14:07:31,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6415, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6621, PETRI_PLACES=276, PETRI_TRANSITIONS=397} [2024-06-04 14:07:31,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-04 14:07:31,164 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 397 transitions, 6621 flow [2024-06-04 14:07:31,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:31,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:31,164 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] [2024-06-04 14:07:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:07:31,165 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)] === [2024-06-04 14:07:31,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash -198502095, now seen corresponding path program 3 times [2024-06-04 14:07:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729919165] [2024-06-04 14:07:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729919165] [2024-06-04 14:07:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729919165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:31,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:31,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:07:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184414708] [2024-06-04 14:07:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:31,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:07:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:07:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:07:31,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:31,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 397 transitions, 6621 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:31,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:31,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:31,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:32,071 INFO L124 PetriNetUnfolderBase]: 3112/5206 cut-off events. [2024-06-04 14:07:32,071 INFO L125 PetriNetUnfolderBase]: For 410416/410426 co-relation queries the response was YES. [2024-06-04 14:07:32,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38485 conditions, 5206 events. 3112/5206 cut-off events. For 410416/410426 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33859 event pairs, 830 based on Foata normal form. 11/5215 useless extension candidates. Maximal degree in co-relation 38353. Up to 4532 conditions per place. [2024-06-04 14:07:32,134 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 307 selfloop transitions, 105 changer transitions 0/418 dead transitions. [2024-06-04 14:07:32,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 418 transitions, 7777 flow [2024-06-04 14:07:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 14:07:32,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 14:07:32,135 INFO L175 Difference]: Start difference. First operand has 276 places, 397 transitions, 6621 flow. Second operand 6 states and 145 transitions. [2024-06-04 14:07:32,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 418 transitions, 7777 flow [2024-06-04 14:07:32,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 418 transitions, 7578 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:32,997 INFO L231 Difference]: Finished difference. Result has 279 places, 397 transitions, 6638 flow [2024-06-04 14:07:32,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6638, PETRI_PLACES=279, PETRI_TRANSITIONS=397} [2024-06-04 14:07:32,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-04 14:07:32,998 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 397 transitions, 6638 flow [2024-06-04 14:07:32,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:32,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:32,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:32,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:07:32,998 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)] === [2024-06-04 14:07:32,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:32,999 INFO L85 PathProgramCache]: Analyzing trace with hash -198382125, now seen corresponding path program 4 times [2024-06-04 14:07:32,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:32,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997541716] [2024-06-04 14:07:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:32,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:33,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:33,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997541716] [2024-06-04 14:07:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997541716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:33,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:33,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:33,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888975409] [2024-06-04 14:07:33,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:33,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:33,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:33,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:33,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 397 transitions, 6638 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:33,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:33,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:33,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:33,969 INFO L124 PetriNetUnfolderBase]: 3117/5195 cut-off events. [2024-06-04 14:07:33,970 INFO L125 PetriNetUnfolderBase]: For 420381/420381 co-relation queries the response was YES. [2024-06-04 14:07:34,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38612 conditions, 5195 events. 3117/5195 cut-off events. For 420381/420381 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33652 event pairs, 808 based on Foata normal form. 1/5191 useless extension candidates. Maximal degree in co-relation 38480. Up to 4538 conditions per place. [2024-06-04 14:07:34,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 118 changer transitions 0/425 dead transitions. [2024-06-04 14:07:34,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 425 transitions, 7876 flow [2024-06-04 14:07:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 14:07:34,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 14:07:34,035 INFO L175 Difference]: Start difference. First operand has 279 places, 397 transitions, 6638 flow. Second operand 7 states and 169 transitions. [2024-06-04 14:07:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 425 transitions, 7876 flow [2024-06-04 14:07:34,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 425 transitions, 7471 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:34,999 INFO L231 Difference]: Finished difference. Result has 279 places, 400 transitions, 6529 flow [2024-06-04 14:07:35,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6529, PETRI_PLACES=279, PETRI_TRANSITIONS=400} [2024-06-04 14:07:35,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-04 14:07:35,000 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 400 transitions, 6529 flow [2024-06-04 14:07:35,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:35,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:35,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:35,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:07:35,001 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)] === [2024-06-04 14:07:35,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1664166153, now seen corresponding path program 1 times [2024-06-04 14:07:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:35,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601052236] [2024-06-04 14:07:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:35,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:35,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:35,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601052236] [2024-06-04 14:07:35,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601052236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:35,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:35,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:35,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548203350] [2024-06-04 14:07:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:35,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:35,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:35,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:35,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 400 transitions, 6529 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:35,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:35,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:35,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:36,098 INFO L124 PetriNetUnfolderBase]: 3143/5237 cut-off events. [2024-06-04 14:07:36,098 INFO L125 PetriNetUnfolderBase]: For 435947/435947 co-relation queries the response was YES. [2024-06-04 14:07:36,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39148 conditions, 5237 events. 3143/5237 cut-off events. For 435947/435947 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33969 event pairs, 832 based on Foata normal form. 2/5234 useless extension candidates. Maximal degree in co-relation 39017. Up to 4218 conditions per place. [2024-06-04 14:07:36,150 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 220 changer transitions 0/432 dead transitions. [2024-06-04 14:07:36,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 432 transitions, 8011 flow [2024-06-04 14:07:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:07:36,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 14:07:36,151 INFO L175 Difference]: Start difference. First operand has 279 places, 400 transitions, 6529 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:07:36,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 432 transitions, 8011 flow [2024-06-04 14:07:37,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 432 transitions, 7875 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:37,066 INFO L231 Difference]: Finished difference. Result has 284 places, 408 transitions, 6982 flow [2024-06-04 14:07:37,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6393, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6982, PETRI_PLACES=284, PETRI_TRANSITIONS=408} [2024-06-04 14:07:37,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-04 14:07:37,067 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 408 transitions, 6982 flow [2024-06-04 14:07:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:37,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:37,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:37,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:07:37,068 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)] === [2024-06-04 14:07:37,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1664190891, now seen corresponding path program 5 times [2024-06-04 14:07:37,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:37,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703936448] [2024-06-04 14:07:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:37,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703936448] [2024-06-04 14:07:37,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703936448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:37,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:37,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:37,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284925061] [2024-06-04 14:07:37,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:37,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:37,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:37,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:37,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:37,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:37,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 408 transitions, 6982 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:37,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:37,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:37,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:38,028 INFO L124 PetriNetUnfolderBase]: 3140/5241 cut-off events. [2024-06-04 14:07:38,028 INFO L125 PetriNetUnfolderBase]: For 445082/445082 co-relation queries the response was YES. [2024-06-04 14:07:38,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39621 conditions, 5241 events. 3140/5241 cut-off events. For 445082/445082 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34088 event pairs, 800 based on Foata normal form. 1/5237 useless extension candidates. Maximal degree in co-relation 39488. Up to 4571 conditions per place. [2024-06-04 14:07:38,093 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 314 selfloop transitions, 108 changer transitions 0/428 dead transitions. [2024-06-04 14:07:38,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 428 transitions, 8312 flow [2024-06-04 14:07:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 14:07:38,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:07:38,094 INFO L175 Difference]: Start difference. First operand has 284 places, 408 transitions, 6982 flow. Second operand 7 states and 164 transitions. [2024-06-04 14:07:38,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 428 transitions, 8312 flow [2024-06-04 14:07:39,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 428 transitions, 7820 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:39,052 INFO L231 Difference]: Finished difference. Result has 286 places, 408 transitions, 6714 flow [2024-06-04 14:07:39,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6714, PETRI_PLACES=286, PETRI_TRANSITIONS=408} [2024-06-04 14:07:39,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-04 14:07:39,052 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 408 transitions, 6714 flow [2024-06-04 14:07:39,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:39,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:39,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:39,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:07:39,053 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)] === [2024-06-04 14:07:39,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:39,053 INFO L85 PathProgramCache]: Analyzing trace with hash 257838143, now seen corresponding path program 2 times [2024-06-04 14:07:39,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:39,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477902355] [2024-06-04 14:07:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:39,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:39,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477902355] [2024-06-04 14:07:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477902355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:39,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:39,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:39,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992844100] [2024-06-04 14:07:39,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:39,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:39,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:39,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 408 transitions, 6714 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:39,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:39,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:39,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:40,236 INFO L124 PetriNetUnfolderBase]: 3134/5222 cut-off events. [2024-06-04 14:07:40,237 INFO L125 PetriNetUnfolderBase]: For 451645/451645 co-relation queries the response was YES. [2024-06-04 14:07:40,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39117 conditions, 5222 events. 3134/5222 cut-off events. For 451645/451645 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33851 event pairs, 836 based on Foata normal form. 2/5219 useless extension candidates. Maximal degree in co-relation 38983. Up to 4211 conditions per place. [2024-06-04 14:07:40,308 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 218 changer transitions 0/431 dead transitions. [2024-06-04 14:07:40,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 431 transitions, 7916 flow [2024-06-04 14:07:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 14:07:40,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 14:07:40,310 INFO L175 Difference]: Start difference. First operand has 286 places, 408 transitions, 6714 flow. Second operand 8 states and 187 transitions. [2024-06-04 14:07:40,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 431 transitions, 7916 flow [2024-06-04 14:07:41,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 431 transitions, 7710 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:41,370 INFO L231 Difference]: Finished difference. Result has 290 places, 408 transitions, 6951 flow [2024-06-04 14:07:41,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6508, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6951, PETRI_PLACES=290, PETRI_TRANSITIONS=408} [2024-06-04 14:07:41,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-04 14:07:41,371 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 408 transitions, 6951 flow [2024-06-04 14:07:41,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:41,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:41,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:41,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:07:41,372 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)] === [2024-06-04 14:07:41,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1784694849, now seen corresponding path program 6 times [2024-06-04 14:07:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:41,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995797709] [2024-06-04 14:07:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:41,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:41,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:41,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995797709] [2024-06-04 14:07:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995797709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:41,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:41,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:41,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147981594] [2024-06-04 14:07:41,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:41,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:41,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:41,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 408 transitions, 6951 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:41,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:41,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:41,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:42,366 INFO L124 PetriNetUnfolderBase]: 3131/5227 cut-off events. [2024-06-04 14:07:42,366 INFO L125 PetriNetUnfolderBase]: For 457871/457871 co-relation queries the response was YES. [2024-06-04 14:07:42,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39520 conditions, 5227 events. 3131/5227 cut-off events. For 457871/457871 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33942 event pairs, 801 based on Foata normal form. 1/5223 useless extension candidates. Maximal degree in co-relation 39385. Up to 4560 conditions per place. [2024-06-04 14:07:42,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 113 changer transitions 0/429 dead transitions. [2024-06-04 14:07:42,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 429 transitions, 8147 flow [2024-06-04 14:07:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 14:07:42,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 14:07:42,431 INFO L175 Difference]: Start difference. First operand has 290 places, 408 transitions, 6951 flow. Second operand 9 states and 199 transitions. [2024-06-04 14:07:42,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 429 transitions, 8147 flow [2024-06-04 14:07:43,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 429 transitions, 7700 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:43,472 INFO L231 Difference]: Finished difference. Result has 292 places, 408 transitions, 6736 flow [2024-06-04 14:07:43,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6504, PETRI_DIFFERENCE_MINUEND_PLACES=283, 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=9, PETRI_FLOW=6736, PETRI_PLACES=292, PETRI_TRANSITIONS=408} [2024-06-04 14:07:43,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-04 14:07:43,473 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 408 transitions, 6736 flow [2024-06-04 14:07:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:43,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:43,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:43,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:07:43,474 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)] === [2024-06-04 14:07:43,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1461299617, now seen corresponding path program 3 times [2024-06-04 14:07:43,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:43,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171674085] [2024-06-04 14:07:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:43,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171674085] [2024-06-04 14:07:43,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171674085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:43,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:43,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166174020] [2024-06-04 14:07:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:43,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:43,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 408 transitions, 6736 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:43,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:43,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:43,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:44,488 INFO L124 PetriNetUnfolderBase]: 3165/5279 cut-off events. [2024-06-04 14:07:44,489 INFO L125 PetriNetUnfolderBase]: For 480829/480829 co-relation queries the response was YES. [2024-06-04 14:07:44,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39991 conditions, 5279 events. 3165/5279 cut-off events. For 480829/480829 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34306 event pairs, 836 based on Foata normal form. 2/5276 useless extension candidates. Maximal degree in co-relation 39855. Up to 4243 conditions per place. [2024-06-04 14:07:44,557 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 214 changer transitions 0/441 dead transitions. [2024-06-04 14:07:44,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 441 transitions, 8310 flow [2024-06-04 14:07:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 14:07:44,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 14:07:44,558 INFO L175 Difference]: Start difference. First operand has 292 places, 408 transitions, 6736 flow. Second operand 9 states and 205 transitions. [2024-06-04 14:07:44,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 441 transitions, 8310 flow [2024-06-04 14:07:45,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 441 transitions, 7980 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:45,597 INFO L231 Difference]: Finished difference. Result has 291 places, 418 transitions, 7017 flow [2024-06-04 14:07:45,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6406, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7017, PETRI_PLACES=291, PETRI_TRANSITIONS=418} [2024-06-04 14:07:45,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-04 14:07:45,598 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 418 transitions, 7017 flow [2024-06-04 14:07:45,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:45,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:45,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:45,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:07:45,598 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)] === [2024-06-04 14:07:45,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1453947967, now seen corresponding path program 4 times [2024-06-04 14:07:45,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:45,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580467279] [2024-06-04 14:07:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:45,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:45,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580467279] [2024-06-04 14:07:45,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580467279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:45,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:45,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:45,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502499047] [2024-06-04 14:07:45,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:45,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:45,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:45,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:45,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 418 transitions, 7017 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:45,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:45,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:45,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:46,592 INFO L124 PetriNetUnfolderBase]: 3167/5276 cut-off events. [2024-06-04 14:07:46,592 INFO L125 PetriNetUnfolderBase]: For 488751/488751 co-relation queries the response was YES. [2024-06-04 14:07:46,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40399 conditions, 5276 events. 3167/5276 cut-off events. For 488751/488751 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34227 event pairs, 842 based on Foata normal form. 2/5273 useless extension candidates. Maximal degree in co-relation 40263. Up to 4244 conditions per place. [2024-06-04 14:07:46,663 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 216 changer transitions 0/441 dead transitions. [2024-06-04 14:07:46,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 441 transitions, 8305 flow [2024-06-04 14:07:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 14:07:46,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 14:07:46,665 INFO L175 Difference]: Start difference. First operand has 291 places, 418 transitions, 7017 flow. Second operand 8 states and 186 transitions. [2024-06-04 14:07:46,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 441 transitions, 8305 flow [2024-06-04 14:07:48,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 441 transitions, 7907 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:48,053 INFO L231 Difference]: Finished difference. Result has 294 places, 421 transitions, 7122 flow [2024-06-04 14:07:48,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7122, PETRI_PLACES=294, PETRI_TRANSITIONS=421} [2024-06-04 14:07:48,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-04 14:07:48,054 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 421 transitions, 7122 flow [2024-06-04 14:07:48,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:48,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:48,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:48,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:07:48,063 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)] === [2024-06-04 14:07:48,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:48,063 INFO L85 PathProgramCache]: Analyzing trace with hash 209541971, now seen corresponding path program 5 times [2024-06-04 14:07:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:48,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626430291] [2024-06-04 14:07:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:48,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:48,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:48,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626430291] [2024-06-04 14:07:48,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626430291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:48,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:48,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:48,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226719302] [2024-06-04 14:07:48,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:48,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:48,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:48,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:48,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 421 transitions, 7122 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:48,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:48,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:48,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:49,044 INFO L124 PetriNetUnfolderBase]: 3177/5307 cut-off events. [2024-06-04 14:07:49,045 INFO L125 PetriNetUnfolderBase]: For 502447/502447 co-relation queries the response was YES. [2024-06-04 14:07:49,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40668 conditions, 5307 events. 3177/5307 cut-off events. For 502447/502447 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34596 event pairs, 824 based on Foata normal form. 2/5304 useless extension candidates. Maximal degree in co-relation 40530. Up to 4254 conditions per place. [2024-06-04 14:07:49,112 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 224 changer transitions 0/449 dead transitions. [2024-06-04 14:07:49,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 449 transitions, 8655 flow [2024-06-04 14:07:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 14:07:49,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 14:07:49,114 INFO L175 Difference]: Start difference. First operand has 294 places, 421 transitions, 7122 flow. Second operand 9 states and 207 transitions. [2024-06-04 14:07:49,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 449 transitions, 8655 flow [2024-06-04 14:07:50,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 449 transitions, 8324 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:50,493 INFO L231 Difference]: Finished difference. Result has 298 places, 427 transitions, 7375 flow [2024-06-04 14:07:50,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6796, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7375, PETRI_PLACES=298, PETRI_TRANSITIONS=427} [2024-06-04 14:07:50,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-04 14:07:50,494 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 427 transitions, 7375 flow [2024-06-04 14:07:50,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:50,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:50,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:07:50,495 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)] === [2024-06-04 14:07:50,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1461176485, now seen corresponding path program 4 times [2024-06-04 14:07:50,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566454356] [2024-06-04 14:07:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:50,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:50,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566454356] [2024-06-04 14:07:50,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566454356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:50,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:50,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946110381] [2024-06-04 14:07:50,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:50,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:50,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:50,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 427 transitions, 7375 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:50,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:50,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:51,697 INFO L124 PetriNetUnfolderBase]: 3309/5508 cut-off events. [2024-06-04 14:07:51,698 INFO L125 PetriNetUnfolderBase]: For 647429/647429 co-relation queries the response was YES. [2024-06-04 14:07:51,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42023 conditions, 5508 events. 3309/5508 cut-off events. For 647429/647429 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36053 event pairs, 890 based on Foata normal form. 42/5545 useless extension candidates. Maximal degree in co-relation 41883. Up to 4272 conditions per place. [2024-06-04 14:07:51,774 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 222 changer transitions 3/455 dead transitions. [2024-06-04 14:07:51,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 455 transitions, 8733 flow [2024-06-04 14:07:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:07:51,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 14:07:51,775 INFO L175 Difference]: Start difference. First operand has 298 places, 427 transitions, 7375 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:07:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 455 transitions, 8733 flow [2024-06-04 14:07:53,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 455 transitions, 8207 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:53,067 INFO L231 Difference]: Finished difference. Result has 300 places, 428 transitions, 7356 flow [2024-06-04 14:07:53,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7356, PETRI_PLACES=300, PETRI_TRANSITIONS=428} [2024-06-04 14:07:53,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-04 14:07:53,067 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 428 transitions, 7356 flow [2024-06-04 14:07:53,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:53,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:53,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:07:53,068 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)] === [2024-06-04 14:07:53,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -47689623, now seen corresponding path program 5 times [2024-06-04 14:07:53,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:53,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084491774] [2024-06-04 14:07:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:53,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084491774] [2024-06-04 14:07:53,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084491774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:53,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:53,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:53,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876431304] [2024-06-04 14:07:53,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:53,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:53,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:53,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:53,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:53,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 428 transitions, 7356 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:53,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:53,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:54,186 INFO L124 PetriNetUnfolderBase]: 3431/5734 cut-off events. [2024-06-04 14:07:54,186 INFO L125 PetriNetUnfolderBase]: For 661980/661980 co-relation queries the response was YES. [2024-06-04 14:07:54,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43308 conditions, 5734 events. 3431/5734 cut-off events. For 661980/661980 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37964 event pairs, 950 based on Foata normal form. 42/5771 useless extension candidates. Maximal degree in co-relation 43167. Up to 4474 conditions per place. [2024-06-04 14:07:54,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 222 changer transitions 3/456 dead transitions. [2024-06-04 14:07:54,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 456 transitions, 8724 flow [2024-06-04 14:07:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 14:07:54,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 14:07:54,289 INFO L175 Difference]: Start difference. First operand has 300 places, 428 transitions, 7356 flow. Second operand 8 states and 192 transitions. [2024-06-04 14:07:54,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 456 transitions, 8724 flow [2024-06-04 14:07:55,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 456 transitions, 8246 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:55,726 INFO L231 Difference]: Finished difference. Result has 302 places, 429 transitions, 7389 flow [2024-06-04 14:07:55,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6878, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7389, PETRI_PLACES=302, PETRI_TRANSITIONS=429} [2024-06-04 14:07:55,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-04 14:07:55,726 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 429 transitions, 7389 flow [2024-06-04 14:07:55,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:55,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:55,727 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] [2024-06-04 14:07:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:07:55,727 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)] === [2024-06-04 14:07:55,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash 592191235, now seen corresponding path program 6 times [2024-06-04 14:07:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325852859] [2024-06-04 14:07:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:55,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325852859] [2024-06-04 14:07:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325852859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:55,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:55,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579421484] [2024-06-04 14:07:55,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:55,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:55,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:55,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:55,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 429 transitions, 7389 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:55,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:55,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:55,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:56,882 INFO L124 PetriNetUnfolderBase]: 3529/5900 cut-off events. [2024-06-04 14:07:56,882 INFO L125 PetriNetUnfolderBase]: For 659551/659551 co-relation queries the response was YES. [2024-06-04 14:07:56,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44117 conditions, 5900 events. 3529/5900 cut-off events. For 659551/659551 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39339 event pairs, 934 based on Foata normal form. 36/5931 useless extension candidates. Maximal degree in co-relation 43975. Up to 4246 conditions per place. [2024-06-04 14:07:56,954 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 227 changer transitions 6/463 dead transitions. [2024-06-04 14:07:56,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 463 transitions, 8813 flow [2024-06-04 14:07:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:07:56,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 14:07:56,955 INFO L175 Difference]: Start difference. First operand has 302 places, 429 transitions, 7389 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:07:56,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 463 transitions, 8813 flow [2024-06-04 14:07:58,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 463 transitions, 8331 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:58,536 INFO L231 Difference]: Finished difference. Result has 304 places, 430 transitions, 7423 flow [2024-06-04 14:07:58,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6907, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7423, PETRI_PLACES=304, PETRI_TRANSITIONS=430} [2024-06-04 14:07:58,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-04 14:07:58,537 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 430 transitions, 7423 flow [2024-06-04 14:07:58,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:58,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:58,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:58,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:07:58,538 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)] === [2024-06-04 14:07:58,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash -36565149, now seen corresponding path program 1 times [2024-06-04 14:07:58,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876393470] [2024-06-04 14:07:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:58,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:58,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876393470] [2024-06-04 14:07:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876393470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:58,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015335816] [2024-06-04 14:07:58,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:58,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:07:58,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 430 transitions, 7423 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:58,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:58,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:07:58,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:59,770 INFO L124 PetriNetUnfolderBase]: 3741/6286 cut-off events. [2024-06-04 14:07:59,770 INFO L125 PetriNetUnfolderBase]: For 733682/733682 co-relation queries the response was YES. [2024-06-04 14:07:59,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47748 conditions, 6286 events. 3741/6286 cut-off events. For 733682/733682 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42635 event pairs, 988 based on Foata normal form. 36/6317 useless extension candidates. Maximal degree in co-relation 47605. Up to 4202 conditions per place. [2024-06-04 14:07:59,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 220 changer transitions 0/467 dead transitions. [2024-06-04 14:07:59,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 467 transitions, 9071 flow [2024-06-04 14:07:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:07:59,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 14:07:59,853 INFO L175 Difference]: Start difference. First operand has 304 places, 430 transitions, 7423 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:07:59,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 467 transitions, 9071 flow [2024-06-04 14:08:01,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 467 transitions, 8574 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:08:01,512 INFO L231 Difference]: Finished difference. Result has 307 places, 434 transitions, 7516 flow [2024-06-04 14:08:01,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7516, PETRI_PLACES=307, PETRI_TRANSITIONS=434} [2024-06-04 14:08:01,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-04 14:08:01,513 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 434 transitions, 7516 flow [2024-06-04 14:08:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:01,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:01,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:01,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:08:01,513 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)] === [2024-06-04 14:08:01,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:01,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1452755629, now seen corresponding path program 6 times [2024-06-04 14:08:01,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:01,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239874175] [2024-06-04 14:08:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:01,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:01,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:01,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239874175] [2024-06-04 14:08:01,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239874175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:01,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:01,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:01,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993211320] [2024-06-04 14:08:01,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:01,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:01,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:01,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:01,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:01,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:01,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 434 transitions, 7516 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:01,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:01,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:01,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:02,686 INFO L124 PetriNetUnfolderBase]: 3738/6281 cut-off events. [2024-06-04 14:08:02,686 INFO L125 PetriNetUnfolderBase]: For 633966/633974 co-relation queries the response was YES. [2024-06-04 14:08:02,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47797 conditions, 6281 events. 3738/6281 cut-off events. For 633966/633974 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42778 event pairs, 1068 based on Foata normal form. 4/6280 useless extension candidates. Maximal degree in co-relation 47652. Up to 5188 conditions per place. [2024-06-04 14:08:02,764 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 244 changer transitions 0/457 dead transitions. [2024-06-04 14:08:02,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 457 transitions, 9162 flow [2024-06-04 14:08:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 14:08:02,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 14:08:02,766 INFO L175 Difference]: Start difference. First operand has 307 places, 434 transitions, 7516 flow. Second operand 8 states and 186 transitions. [2024-06-04 14:08:02,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 457 transitions, 9162 flow [2024-06-04 14:08:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 457 transitions, 8841 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:08:04,258 INFO L231 Difference]: Finished difference. Result has 311 places, 435 transitions, 7717 flow [2024-06-04 14:08:04,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7195, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7717, PETRI_PLACES=311, PETRI_TRANSITIONS=435} [2024-06-04 14:08:04,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 14:08:04,259 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 435 transitions, 7717 flow [2024-06-04 14:08:04,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:04,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:04,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:04,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:08:04,260 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)] === [2024-06-04 14:08:04,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash 290924785, now seen corresponding path program 7 times [2024-06-04 14:08:04,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:04,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606761728] [2024-06-04 14:08:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:04,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606761728] [2024-06-04 14:08:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606761728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:04,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856110224] [2024-06-04 14:08:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:04,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:04,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:04,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 435 transitions, 7717 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:04,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:04,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:04,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:05,493 INFO L124 PetriNetUnfolderBase]: 3743/6288 cut-off events. [2024-06-04 14:08:05,494 INFO L125 PetriNetUnfolderBase]: For 643199/643207 co-relation queries the response was YES. [2024-06-04 14:08:05,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48170 conditions, 6288 events. 3743/6288 cut-off events. For 643199/643207 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42831 event pairs, 1068 based on Foata normal form. 4/6287 useless extension candidates. Maximal degree in co-relation 48023. Up to 5192 conditions per place. [2024-06-04 14:08:05,574 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-04 14:08:05,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 459 transitions, 9244 flow [2024-06-04 14:08:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 14:08:05,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 14:08:05,575 INFO L175 Difference]: Start difference. First operand has 311 places, 435 transitions, 7717 flow. Second operand 8 states and 187 transitions. [2024-06-04 14:08:05,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 459 transitions, 9244 flow [2024-06-04 14:08:07,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 459 transitions, 8547 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:08:07,194 INFO L231 Difference]: Finished difference. Result has 312 places, 438 transitions, 7607 flow [2024-06-04 14:08:07,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7607, PETRI_PLACES=312, PETRI_TRANSITIONS=438} [2024-06-04 14:08:07,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-04 14:08:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 438 transitions, 7607 flow [2024-06-04 14:08:07,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:07,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:07,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:08:07,196 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)] === [2024-06-04 14:08:07,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1995581233, now seen corresponding path program 7 times [2024-06-04 14:08:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:07,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576899754] [2024-06-04 14:08:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:07,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:07,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576899754] [2024-06-04 14:08:07,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576899754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:07,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:07,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:08:07,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929572171] [2024-06-04 14:08:07,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:07,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:08:07,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:08:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:08:07,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:07,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 438 transitions, 7607 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:07,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:07,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:07,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:08,424 INFO L124 PetriNetUnfolderBase]: 3740/6314 cut-off events. [2024-06-04 14:08:08,424 INFO L125 PetriNetUnfolderBase]: For 651683/651693 co-relation queries the response was YES. [2024-06-04 14:08:08,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47861 conditions, 6314 events. 3740/6314 cut-off events. For 651683/651693 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 43237 event pairs, 1089 based on Foata normal form. 6/6318 useless extension candidates. Maximal degree in co-relation 47714. Up to 5560 conditions per place. [2024-06-04 14:08:08,672 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 345 selfloop transitions, 102 changer transitions 0/453 dead transitions. [2024-06-04 14:08:08,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 453 transitions, 8707 flow [2024-06-04 14:08:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:08:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:08:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 14:08:08,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 14:08:08,674 INFO L175 Difference]: Start difference. First operand has 312 places, 438 transitions, 7607 flow. Second operand 7 states and 156 transitions. [2024-06-04 14:08:08,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 453 transitions, 8707 flow [2024-06-04 14:08:10,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 453 transitions, 8272 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:08:10,696 INFO L231 Difference]: Finished difference. Result has 314 places, 438 transitions, 7382 flow [2024-06-04 14:08:10,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7172, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7382, PETRI_PLACES=314, PETRI_TRANSITIONS=438} [2024-06-04 14:08:10,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-04 14:08:10,697 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 438 transitions, 7382 flow [2024-06-04 14:08:10,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:10,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:10,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:10,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:08:10,697 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)] === [2024-06-04 14:08:10,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash -483414125, now seen corresponding path program 8 times [2024-06-04 14:08:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:10,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294910127] [2024-06-04 14:08:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:10,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:10,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:10,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294910127] [2024-06-04 14:08:10,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294910127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:10,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:10,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:10,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623147002] [2024-06-04 14:08:10,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:10,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:10,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:10,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:10,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 438 transitions, 7382 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:10,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:10,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:10,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:11,894 INFO L124 PetriNetUnfolderBase]: 3737/6281 cut-off events. [2024-06-04 14:08:11,895 INFO L125 PetriNetUnfolderBase]: For 660439/660447 co-relation queries the response was YES. [2024-06-04 14:08:11,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47417 conditions, 6281 events. 3737/6281 cut-off events. For 660439/660447 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42834 event pairs, 1074 based on Foata normal form. 4/6280 useless extension candidates. Maximal degree in co-relation 47269. Up to 5188 conditions per place. [2024-06-04 14:08:11,976 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-04 14:08:11,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 459 transitions, 8854 flow [2024-06-04 14:08:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 14:08:11,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 14:08:11,978 INFO L175 Difference]: Start difference. First operand has 314 places, 438 transitions, 7382 flow. Second operand 8 states and 187 transitions. [2024-06-04 14:08:11,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 459 transitions, 8854 flow [2024-06-04 14:08:13,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 8745 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:08:13,777 INFO L231 Difference]: Finished difference. Result has 319 places, 438 transitions, 7793 flow [2024-06-04 14:08:13,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7273, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7793, PETRI_PLACES=319, PETRI_TRANSITIONS=438} [2024-06-04 14:08:13,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 14:08:13,778 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 438 transitions, 7793 flow [2024-06-04 14:08:13,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:13,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:08:13,779 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)] === [2024-06-04 14:08:13,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 399481963, now seen corresponding path program 9 times [2024-06-04 14:08:13,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875642755] [2024-06-04 14:08:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:13,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:13,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875642755] [2024-06-04 14:08:13,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875642755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:13,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:13,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:13,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535450485] [2024-06-04 14:08:13,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:13,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:13,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:13,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:13,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 438 transitions, 7793 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:13,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:13,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:13,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:15,077 INFO L124 PetriNetUnfolderBase]: 3734/6278 cut-off events. [2024-06-04 14:08:15,078 INFO L125 PetriNetUnfolderBase]: For 675026/675034 co-relation queries the response was YES. [2024-06-04 14:08:15,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48004 conditions, 6278 events. 3734/6278 cut-off events. For 675026/675034 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42823 event pairs, 1074 based on Foata normal form. 4/6277 useless extension candidates. Maximal degree in co-relation 47854. Up to 5186 conditions per place. [2024-06-04 14:08:15,157 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 247 changer transitions 0/459 dead transitions. [2024-06-04 14:08:15,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 459 transitions, 9271 flow [2024-06-04 14:08:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 14:08:15,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 14:08:15,159 INFO L175 Difference]: Start difference. First operand has 319 places, 438 transitions, 7793 flow. Second operand 8 states and 184 transitions. [2024-06-04 14:08:15,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 459 transitions, 9271 flow [2024-06-04 14:08:17,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 459 transitions, 8392 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-04 14:08:17,251 INFO L231 Difference]: Finished difference. Result has 316 places, 438 transitions, 7414 flow [2024-06-04 14:08:17,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7414, PETRI_PLACES=316, PETRI_TRANSITIONS=438} [2024-06-04 14:08:17,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-04 14:08:17,251 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 438 transitions, 7414 flow [2024-06-04 14:08:17,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:17,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:17,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:17,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:08:17,252 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)] === [2024-06-04 14:08:17,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash -430016241, now seen corresponding path program 10 times [2024-06-04 14:08:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:17,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188855188] [2024-06-04 14:08:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:17,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:17,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:17,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188855188] [2024-06-04 14:08:17,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188855188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:17,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:17,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:17,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910032721] [2024-06-04 14:08:17,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:17,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:17,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:17,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:17,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:17,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 438 transitions, 7414 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:17,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:17,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:17,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:18,543 INFO L124 PetriNetUnfolderBase]: 3731/6299 cut-off events. [2024-06-04 14:08:18,543 INFO L125 PetriNetUnfolderBase]: For 679509/679509 co-relation queries the response was YES. [2024-06-04 14:08:18,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47543 conditions, 6299 events. 3731/6299 cut-off events. For 679509/679509 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43131 event pairs, 1022 based on Foata normal form. 1/6299 useless extension candidates. Maximal degree in co-relation 47394. Up to 5792 conditions per place. [2024-06-04 14:08:18,622 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 53 changer transitions 0/455 dead transitions. [2024-06-04 14:08:18,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 455 transitions, 8528 flow [2024-06-04 14:08:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:08:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:08:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 14:08:18,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-04 14:08:18,623 INFO L175 Difference]: Start difference. First operand has 316 places, 438 transitions, 7414 flow. Second operand 9 states and 190 transitions. [2024-06-04 14:08:18,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 455 transitions, 8528 flow [2024-06-04 14:08:20,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 455 transitions, 8010 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:08:20,495 INFO L231 Difference]: Finished difference. Result has 318 places, 438 transitions, 7008 flow [2024-06-04 14:08:20,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7008, PETRI_PLACES=318, PETRI_TRANSITIONS=438} [2024-06-04 14:08:20,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-04 14:08:20,496 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 438 transitions, 7008 flow [2024-06-04 14:08:20,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:20,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:20,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:20,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:08:20,496 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)] === [2024-06-04 14:08:20,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1503271637, now seen corresponding path program 8 times [2024-06-04 14:08:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:20,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196576112] [2024-06-04 14:08:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196576112] [2024-06-04 14:08:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196576112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:20,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:20,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:08:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102614898] [2024-06-04 14:08:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:08:20,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:20,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:08:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:08:20,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:20,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 438 transitions, 7008 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:20,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:20,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:20,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:21,672 INFO L124 PetriNetUnfolderBase]: 3733/6305 cut-off events. [2024-06-04 14:08:21,673 INFO L125 PetriNetUnfolderBase]: For 691381/691383 co-relation queries the response was YES. [2024-06-04 14:08:21,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47002 conditions, 6305 events. 3733/6305 cut-off events. For 691381/691383 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43168 event pairs, 1031 based on Foata normal form. 4/6308 useless extension candidates. Maximal degree in co-relation 46852. Up to 5571 conditions per place. [2024-06-04 14:08:21,762 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 97 changer transitions 0/464 dead transitions. [2024-06-04 14:08:21,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 464 transitions, 8232 flow [2024-06-04 14:08:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:08:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:08:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:08:21,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 14:08:21,763 INFO L175 Difference]: Start difference. First operand has 318 places, 438 transitions, 7008 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:08:21,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 464 transitions, 8232 flow [2024-06-04 14:08:23,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 464 transitions, 8102 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:08:23,806 INFO L231 Difference]: Finished difference. Result has 316 places, 441 transitions, 7160 flow [2024-06-04 14:08:23,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6878, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7160, PETRI_PLACES=316, PETRI_TRANSITIONS=441} [2024-06-04 14:08:23,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-04 14:08:23,807 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 441 transitions, 7160 flow [2024-06-04 14:08:23,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:23,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:23,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:23,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:08:23,808 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)] === [2024-06-04 14:08:23,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1352643855, now seen corresponding path program 9 times [2024-06-04 14:08:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:23,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185799563] [2024-06-04 14:08:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:23,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:23,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:23,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185799563] [2024-06-04 14:08:23,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185799563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:23,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:23,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:08:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752995691] [2024-06-04 14:08:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:08:23,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:23,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:08:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:08:23,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:23,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 441 transitions, 7160 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:23,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:23,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:23,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:25,054 INFO L124 PetriNetUnfolderBase]: 3727/6297 cut-off events. [2024-06-04 14:08:25,054 INFO L125 PetriNetUnfolderBase]: For 699298/699300 co-relation queries the response was YES. [2024-06-04 14:08:25,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47102 conditions, 6297 events. 3727/6297 cut-off events. For 699298/699300 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43117 event pairs, 1031 based on Foata normal form. 4/6300 useless extension candidates. Maximal degree in co-relation 46951. Up to 5565 conditions per place. [2024-06-04 14:08:25,127 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 362 selfloop transitions, 98 changer transitions 0/466 dead transitions. [2024-06-04 14:08:25,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 466 transitions, 8144 flow [2024-06-04 14:08:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:08:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:08:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 14:08:25,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-04 14:08:25,128 INFO L175 Difference]: Start difference. First operand has 316 places, 441 transitions, 7160 flow. Second operand 6 states and 155 transitions. [2024-06-04 14:08:25,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 466 transitions, 8144 flow [2024-06-04 14:08:27,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 466 transitions, 7934 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:08:27,445 INFO L231 Difference]: Finished difference. Result has 317 places, 441 transitions, 7160 flow [2024-06-04 14:08:27,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7160, PETRI_PLACES=317, PETRI_TRANSITIONS=441} [2024-06-04 14:08:27,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-04 14:08:27,446 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 441 transitions, 7160 flow [2024-06-04 14:08:27,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:27,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:27,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:27,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:08:27,447 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)] === [2024-06-04 14:08:27,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:27,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1352632323, now seen corresponding path program 11 times [2024-06-04 14:08:27,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:27,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878604396] [2024-06-04 14:08:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:27,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:27,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878604396] [2024-06-04 14:08:27,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878604396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:27,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178961254] [2024-06-04 14:08:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:27,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:27,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:27,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 441 transitions, 7160 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:27,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:27,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:27,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:28,680 INFO L124 PetriNetUnfolderBase]: 3724/6292 cut-off events. [2024-06-04 14:08:28,680 INFO L125 PetriNetUnfolderBase]: For 690502/690502 co-relation queries the response was YES. [2024-06-04 14:08:28,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46988 conditions, 6292 events. 3724/6292 cut-off events. For 690502/690502 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43057 event pairs, 1022 based on Foata normal form. 1/6292 useless extension candidates. Maximal degree in co-relation 46837. Up to 5784 conditions per place. [2024-06-04 14:08:28,763 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-04 14:08:28,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 457 transitions, 8100 flow [2024-06-04 14:08:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:08:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:08:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-04 14:08:28,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 14:08:28,764 INFO L175 Difference]: Start difference. First operand has 317 places, 441 transitions, 7160 flow. Second operand 9 states and 189 transitions. [2024-06-04 14:08:28,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 457 transitions, 8100 flow [2024-06-04 14:08:30,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 457 transitions, 7784 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:08:30,897 INFO L231 Difference]: Finished difference. Result has 319 places, 441 transitions, 6956 flow [2024-06-04 14:08:30,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6956, PETRI_PLACES=319, PETRI_TRANSITIONS=441} [2024-06-04 14:08:30,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 14:08:30,898 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 441 transitions, 6956 flow [2024-06-04 14:08:30,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:30,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:30,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:30,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:08:30,898 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)] === [2024-06-04 14:08:30,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash -729554913, now seen corresponding path program 12 times [2024-06-04 14:08:30,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:30,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035713617] [2024-06-04 14:08:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:30,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:30,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035713617] [2024-06-04 14:08:30,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035713617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:30,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:30,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:30,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609422002] [2024-06-04 14:08:30,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:30,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:30,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:31,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:31,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 441 transitions, 6956 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:31,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:31,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:31,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:32,098 INFO L124 PetriNetUnfolderBase]: 3721/6288 cut-off events. [2024-06-04 14:08:32,099 INFO L125 PetriNetUnfolderBase]: For 668916/668916 co-relation queries the response was YES. [2024-06-04 14:08:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46282 conditions, 6288 events. 3721/6288 cut-off events. For 668916/668916 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43074 event pairs, 1022 based on Foata normal form. 1/6288 useless extension candidates. Maximal degree in co-relation 46131. Up to 5439 conditions per place. [2024-06-04 14:08:32,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 158 changer transitions 0/471 dead transitions. [2024-06-04 14:08:32,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 471 transitions, 8316 flow [2024-06-04 14:08:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:08:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:08:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 14:08:32,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-04 14:08:32,179 INFO L175 Difference]: Start difference. First operand has 319 places, 441 transitions, 6956 flow. Second operand 9 states and 212 transitions. [2024-06-04 14:08:32,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 471 transitions, 8316 flow [2024-06-04 14:08:34,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 471 transitions, 8172 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 14:08:34,084 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7138 flow [2024-06-04 14:08:34,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6812, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7138, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-04 14:08:34,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-04 14:08:34,085 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7138 flow [2024-06-04 14:08:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:34,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:34,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:08:34,086 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)] === [2024-06-04 14:08:34,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1219417859, now seen corresponding path program 13 times [2024-06-04 14:08:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:34,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582734916] [2024-06-04 14:08:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:34,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:34,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582734916] [2024-06-04 14:08:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582734916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:34,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:34,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896510150] [2024-06-04 14:08:34,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:34,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:34,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:34,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7138 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:34,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:34,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:34,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:35,283 INFO L124 PetriNetUnfolderBase]: 3731/6307 cut-off events. [2024-06-04 14:08:35,283 INFO L125 PetriNetUnfolderBase]: For 689217/689219 co-relation queries the response was YES. [2024-06-04 14:08:35,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46990 conditions, 6307 events. 3731/6307 cut-off events. For 689217/689219 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43247 event pairs, 1031 based on Foata normal form. 4/6310 useless extension candidates. Maximal degree in co-relation 46838. Up to 5449 conditions per place. [2024-06-04 14:08:35,363 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 145 changer transitions 0/471 dead transitions. [2024-06-04 14:08:35,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 471 transitions, 8585 flow [2024-06-04 14:08:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:08:35,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 14:08:35,365 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7138 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:08:35,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 471 transitions, 8585 flow [2024-06-04 14:08:37,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 471 transitions, 8149 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-04 14:08:37,579 INFO L231 Difference]: Finished difference. Result has 318 places, 445 transitions, 7098 flow [2024-06-04 14:08:37,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7098, PETRI_PLACES=318, PETRI_TRANSITIONS=445} [2024-06-04 14:08:37,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-04 14:08:37,579 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 445 transitions, 7098 flow [2024-06-04 14:08:37,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:37,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:37,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:37,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:08:37,580 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)] === [2024-06-04 14:08:37,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash 721394463, now seen corresponding path program 14 times [2024-06-04 14:08:37,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:37,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459916921] [2024-06-04 14:08:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:37,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:37,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459916921] [2024-06-04 14:08:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459916921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:37,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:37,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:37,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968906821] [2024-06-04 14:08:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:37,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:37,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 445 transitions, 7098 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:37,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:37,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:37,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:38,785 INFO L124 PetriNetUnfolderBase]: 3736/6315 cut-off events. [2024-06-04 14:08:38,785 INFO L125 PetriNetUnfolderBase]: For 684854/684854 co-relation queries the response was YES. [2024-06-04 14:08:38,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46839 conditions, 6315 events. 3736/6315 cut-off events. For 684854/684854 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43278 event pairs, 1022 based on Foata normal form. 1/6315 useless extension candidates. Maximal degree in co-relation 46688. Up to 5453 conditions per place. [2024-06-04 14:08:38,867 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 160 changer transitions 0/478 dead transitions. [2024-06-04 14:08:38,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 478 transitions, 8547 flow [2024-06-04 14:08:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:08:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:08:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 14:08:38,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-04 14:08:38,869 INFO L175 Difference]: Start difference. First operand has 318 places, 445 transitions, 7098 flow. Second operand 9 states and 211 transitions. [2024-06-04 14:08:38,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 478 transitions, 8547 flow [2024-06-04 14:08:41,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 478 transitions, 8217 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:08:41,079 INFO L231 Difference]: Finished difference. Result has 321 places, 448 transitions, 7169 flow [2024-06-04 14:08:41,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7169, PETRI_PLACES=321, PETRI_TRANSITIONS=448} [2024-06-04 14:08:41,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-04 14:08:41,080 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 448 transitions, 7169 flow [2024-06-04 14:08:41,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:41,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:41,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:41,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:08:41,081 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)] === [2024-06-04 14:08:41,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:41,081 INFO L85 PathProgramCache]: Analyzing trace with hash -379716015, now seen corresponding path program 15 times [2024-06-04 14:08:41,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:41,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344126924] [2024-06-04 14:08:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:41,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:41,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:41,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344126924] [2024-06-04 14:08:41,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344126924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:41,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:41,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:41,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205069836] [2024-06-04 14:08:41,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:41,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:41,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:41,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:41,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 448 transitions, 7169 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:41,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:41,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:41,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:42,348 INFO L124 PetriNetUnfolderBase]: 3738/6321 cut-off events. [2024-06-04 14:08:42,348 INFO L125 PetriNetUnfolderBase]: For 699311/699313 co-relation queries the response was YES. [2024-06-04 14:08:42,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46938 conditions, 6321 events. 3738/6321 cut-off events. For 699311/699313 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43306 event pairs, 1031 based on Foata normal form. 4/6324 useless extension candidates. Maximal degree in co-relation 46786. Up to 5457 conditions per place. [2024-06-04 14:08:42,422 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 144 changer transitions 0/476 dead transitions. [2024-06-04 14:08:42,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 476 transitions, 8786 flow [2024-06-04 14:08:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:08:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:08:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 14:08:42,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-04 14:08:42,423 INFO L175 Difference]: Start difference. First operand has 321 places, 448 transitions, 7169 flow. Second operand 9 states and 206 transitions. [2024-06-04 14:08:42,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 476 transitions, 8786 flow [2024-06-04 14:08:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 476 transitions, 8485 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 14:08:44,731 INFO L231 Difference]: Finished difference. Result has 323 places, 451 transitions, 7240 flow [2024-06-04 14:08:44,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6880, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7240, PETRI_PLACES=323, PETRI_TRANSITIONS=451} [2024-06-04 14:08:44,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-04 14:08:44,732 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 451 transitions, 7240 flow [2024-06-04 14:08:44,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:44,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:44,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:44,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:08:44,732 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)] === [2024-06-04 14:08:44,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1304359471, now seen corresponding path program 7 times [2024-06-04 14:08:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:44,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131206648] [2024-06-04 14:08:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:44,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:44,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131206648] [2024-06-04 14:08:44,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131206648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:44,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:44,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:44,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837149262] [2024-06-04 14:08:44,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:44,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:44,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:44,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:44,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:44,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:44,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 451 transitions, 7240 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:44,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:44,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:44,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:45,987 INFO L124 PetriNetUnfolderBase]: 3870/6537 cut-off events. [2024-06-04 14:08:45,988 INFO L125 PetriNetUnfolderBase]: For 872778/872780 co-relation queries the response was YES. [2024-06-04 14:08:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48136 conditions, 6537 events. 3870/6537 cut-off events. For 872778/872780 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45091 event pairs, 1075 based on Foata normal form. 44/6580 useless extension candidates. Maximal degree in co-relation 47984. Up to 5475 conditions per place. [2024-06-04 14:08:46,071 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 327 selfloop transitions, 146 changer transitions 3/482 dead transitions. [2024-06-04 14:08:46,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 482 transitions, 8720 flow [2024-06-04 14:08:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 14:08:46,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 14:08:46,072 INFO L175 Difference]: Start difference. First operand has 323 places, 451 transitions, 7240 flow. Second operand 8 states and 192 transitions. [2024-06-04 14:08:46,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 482 transitions, 8720 flow [2024-06-04 14:08:48,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 482 transitions, 8332 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 14:08:48,591 INFO L231 Difference]: Finished difference. Result has 324 places, 452 transitions, 7218 flow [2024-06-04 14:08:48,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7218, PETRI_PLACES=324, PETRI_TRANSITIONS=452} [2024-06-04 14:08:48,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-04 14:08:48,591 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 452 transitions, 7218 flow [2024-06-04 14:08:48,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:48,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:48,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:48,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:08:48,592 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)] === [2024-06-04 14:08:48,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1315084231, now seen corresponding path program 8 times [2024-06-04 14:08:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:48,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350551686] [2024-06-04 14:08:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:48,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350551686] [2024-06-04 14:08:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350551686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:48,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:48,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:48,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002419675] [2024-06-04 14:08:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:48,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:48,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:48,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:48,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 452 transitions, 7218 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:48,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:48,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:48,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:49,900 INFO L124 PetriNetUnfolderBase]: 3966/6709 cut-off events. [2024-06-04 14:08:49,900 INFO L125 PetriNetUnfolderBase]: For 857707/857709 co-relation queries the response was YES. [2024-06-04 14:08:49,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48563 conditions, 6709 events. 3966/6709 cut-off events. For 857707/857709 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 46573 event pairs, 1121 based on Foata normal form. 44/6752 useless extension candidates. Maximal degree in co-relation 48410. Up to 5639 conditions per place. [2024-06-04 14:08:49,998 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 158 changer transitions 3/489 dead transitions. [2024-06-04 14:08:49,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 489 transitions, 8732 flow [2024-06-04 14:08:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:08:50,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-04 14:08:50,000 INFO L175 Difference]: Start difference. First operand has 324 places, 452 transitions, 7218 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:08:50,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 489 transitions, 8732 flow [2024-06-04 14:08:52,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 489 transitions, 8390 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:08:52,583 INFO L231 Difference]: Finished difference. Result has 326 places, 453 transitions, 7267 flow [2024-06-04 14:08:52,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7267, PETRI_PLACES=326, PETRI_TRANSITIONS=453} [2024-06-04 14:08:52,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-04 14:08:52,584 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 453 transitions, 7267 flow [2024-06-04 14:08:52,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:52,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:52,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:52,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:08:52,584 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)] === [2024-06-04 14:08:52,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1223240531, now seen corresponding path program 9 times [2024-06-04 14:08:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737875522] [2024-06-04 14:08:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:52,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:52,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:52,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737875522] [2024-06-04 14:08:52,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737875522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:52,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:52,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984880419] [2024-06-04 14:08:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:52,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:52,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:52,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:52,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 453 transitions, 7267 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:52,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:52,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:52,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:53,957 INFO L124 PetriNetUnfolderBase]: 4125/6994 cut-off events. [2024-06-04 14:08:53,957 INFO L125 PetriNetUnfolderBase]: For 902217/902219 co-relation queries the response was YES. [2024-06-04 14:08:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50369 conditions, 6994 events. 4125/6994 cut-off events. For 902217/902219 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 48950 event pairs, 1018 based on Foata normal form. 38/7031 useless extension candidates. Maximal degree in co-relation 50215. Up to 5004 conditions per place. [2024-06-04 14:08:54,053 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 168 changer transitions 4/498 dead transitions. [2024-06-04 14:08:54,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 498 transitions, 8953 flow [2024-06-04 14:08:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:08:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:08:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 14:08:54,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 14:08:54,055 INFO L175 Difference]: Start difference. First operand has 326 places, 453 transitions, 7267 flow. Second operand 8 states and 208 transitions. [2024-06-04 14:08:54,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 498 transitions, 8953 flow [2024-06-04 14:08:56,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 498 transitions, 8587 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:08:56,922 INFO L231 Difference]: Finished difference. Result has 328 places, 452 transitions, 7214 flow [2024-06-04 14:08:56,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6901, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7214, PETRI_PLACES=328, PETRI_TRANSITIONS=452} [2024-06-04 14:08:56,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-04 14:08:56,922 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 452 transitions, 7214 flow [2024-06-04 14:08:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:56,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:08:56,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:08:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:08:56,923 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)] === [2024-06-04 14:08:56,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:08:56,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1712274905, now seen corresponding path program 2 times [2024-06-04 14:08:56,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:08:56,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111964063] [2024-06-04 14:08:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:08:56,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:08:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:08:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:08:57,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:08:57,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111964063] [2024-06-04 14:08:57,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111964063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:08:57,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:08:57,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:08:57,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198884827] [2024-06-04 14:08:57,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:08:57,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:08:57,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:08:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:08:57,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:08:57,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:08:57,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 452 transitions, 7214 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:08:57,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:08:57,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:08:57,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:08:58,431 INFO L124 PetriNetUnfolderBase]: 4390/7457 cut-off events. [2024-06-04 14:08:58,431 INFO L125 PetriNetUnfolderBase]: For 1041224/1041226 co-relation queries the response was YES. [2024-06-04 14:08:58,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54997 conditions, 7457 events. 4390/7457 cut-off events. For 1041224/1041226 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 53104 event pairs, 1060 based on Foata normal form. 44/7500 useless extension candidates. Maximal degree in co-relation 54842. Up to 5752 conditions per place. [2024-06-04 14:08:58,537 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 110 changer transitions 0/497 dead transitions. [2024-06-04 14:08:58,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 497 transitions, 8658 flow [2024-06-04 14:08:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:08:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:08:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-04 14:08:58,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-04 14:08:58,547 INFO L175 Difference]: Start difference. First operand has 328 places, 452 transitions, 7214 flow. Second operand 7 states and 185 transitions. [2024-06-04 14:08:58,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 497 transitions, 8658 flow [2024-06-04 14:09:00,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 497 transitions, 8216 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 14:09:00,939 INFO L231 Difference]: Finished difference. Result has 329 places, 458 transitions, 7181 flow [2024-06-04 14:09:00,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7181, PETRI_PLACES=329, PETRI_TRANSITIONS=458} [2024-06-04 14:09:00,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-04 14:09:00,940 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 458 transitions, 7181 flow [2024-06-04 14:09:00,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:00,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:00,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:09:00,941 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)] === [2024-06-04 14:09:00,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1211789627, now seen corresponding path program 3 times [2024-06-04 14:09:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:00,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442801156] [2024-06-04 14:09:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:01,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442801156] [2024-06-04 14:09:01,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442801156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:01,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:01,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:01,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650066889] [2024-06-04 14:09:01,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:01,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:01,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:01,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:01,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 458 transitions, 7181 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:01,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:01,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:01,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:02,405 INFO L124 PetriNetUnfolderBase]: 4505/7692 cut-off events. [2024-06-04 14:09:02,405 INFO L125 PetriNetUnfolderBase]: For 1001773/1001775 co-relation queries the response was YES. [2024-06-04 14:09:02,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56061 conditions, 7692 events. 4505/7692 cut-off events. For 1001773/1001775 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55455 event pairs, 1309 based on Foata normal form. 38/7729 useless extension candidates. Maximal degree in co-relation 55904. Up to 5946 conditions per place. [2024-06-04 14:09:02,504 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 143 changer transitions 0/498 dead transitions. [2024-06-04 14:09:02,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 498 transitions, 8983 flow [2024-06-04 14:09:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:09:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:09:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:09:02,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-04 14:09:02,505 INFO L175 Difference]: Start difference. First operand has 329 places, 458 transitions, 7181 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:09:02,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 498 transitions, 8983 flow [2024-06-04 14:09:06,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 498 transitions, 8781 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 14:09:06,338 INFO L231 Difference]: Finished difference. Result has 334 places, 462 transitions, 7430 flow [2024-06-04 14:09:06,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7430, PETRI_PLACES=334, PETRI_TRANSITIONS=462} [2024-06-04 14:09:06,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 14:09:06,339 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 462 transitions, 7430 flow [2024-06-04 14:09:06,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:06,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:06,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:06,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:09:06,340 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)] === [2024-06-04 14:09:06,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1269446105, now seen corresponding path program 4 times [2024-06-04 14:09:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:06,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171673106] [2024-06-04 14:09:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:06,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:06,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171673106] [2024-06-04 14:09:06,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171673106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:06,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:06,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724268333] [2024-06-04 14:09:06,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:06,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:06,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:06,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:06,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 462 transitions, 7430 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:06,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:06,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:06,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:08,165 INFO L124 PetriNetUnfolderBase]: 4954/8467 cut-off events. [2024-06-04 14:09:08,166 INFO L125 PetriNetUnfolderBase]: For 1265104/1265106 co-relation queries the response was YES. [2024-06-04 14:09:08,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64752 conditions, 8467 events. 4954/8467 cut-off events. For 1265104/1265106 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61919 event pairs, 1199 based on Foata normal form. 44/8510 useless extension candidates. Maximal degree in co-relation 64593. Up to 4666 conditions per place. [2024-06-04 14:09:08,270 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 114 changer transitions 0/513 dead transitions. [2024-06-04 14:09:08,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 513 transitions, 9166 flow [2024-06-04 14:09:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:09:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:09:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 14:09:08,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-04 14:09:08,272 INFO L175 Difference]: Start difference. First operand has 334 places, 462 transitions, 7430 flow. Second operand 7 states and 188 transitions. [2024-06-04 14:09:08,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 513 transitions, 9166 flow [2024-06-04 14:09:12,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 513 transitions, 8922 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-04 14:09:12,273 INFO L231 Difference]: Finished difference. Result has 339 places, 469 transitions, 7669 flow [2024-06-04 14:09:12,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7669, PETRI_PLACES=339, PETRI_TRANSITIONS=469} [2024-06-04 14:09:12,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-04 14:09:12,274 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 469 transitions, 7669 flow [2024-06-04 14:09:12,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:12,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:12,275 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] [2024-06-04 14:09:12,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:09:12,276 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)] === [2024-06-04 14:09:12,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -571703117, now seen corresponding path program 1 times [2024-06-04 14:09:12,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:12,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29456672] [2024-06-04 14:09:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:12,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:12,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:12,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29456672] [2024-06-04 14:09:12,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29456672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:12,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:12,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:12,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614597809] [2024-06-04 14:09:12,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:12,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:12,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:12,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:12,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:12,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 469 transitions, 7669 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:12,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:12,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:12,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:14,283 INFO L124 PetriNetUnfolderBase]: 5235/8945 cut-off events. [2024-06-04 14:09:14,283 INFO L125 PetriNetUnfolderBase]: For 1433218/1433226 co-relation queries the response was YES. [2024-06-04 14:09:14,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71037 conditions, 8945 events. 5235/8945 cut-off events. For 1433218/1433226 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 66951 event pairs, 1641 based on Foata normal form. 39/8979 useless extension candidates. Maximal degree in co-relation 70874. Up to 6372 conditions per place. [2024-06-04 14:09:14,390 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 213 selfloop transitions, 285 changer transitions 7/511 dead transitions. [2024-06-04 14:09:14,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9299 flow [2024-06-04 14:09:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:09:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:09:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 14:09:14,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-04 14:09:14,391 INFO L175 Difference]: Start difference. First operand has 339 places, 469 transitions, 7669 flow. Second operand 8 states and 201 transitions. [2024-06-04 14:09:14,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9299 flow [2024-06-04 14:09:18,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 511 transitions, 9105 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 14:09:18,960 INFO L231 Difference]: Finished difference. Result has 344 places, 471 transitions, 8109 flow [2024-06-04 14:09:18,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8109, PETRI_PLACES=344, PETRI_TRANSITIONS=471} [2024-06-04 14:09:18,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-04 14:09:18,961 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 471 transitions, 8109 flow [2024-06-04 14:09:18,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:18,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:18,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:09:18,962 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)] === [2024-06-04 14:09:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash -861389911, now seen corresponding path program 2 times [2024-06-04 14:09:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:18,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100154479] [2024-06-04 14:09:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:18,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:19,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:19,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100154479] [2024-06-04 14:09:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100154479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:19,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154399909] [2024-06-04 14:09:19,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:19,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:19,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 471 transitions, 8109 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:19,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:19,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:19,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:21,091 INFO L124 PetriNetUnfolderBase]: 5317/9097 cut-off events. [2024-06-04 14:09:21,091 INFO L125 PetriNetUnfolderBase]: For 1463339/1463347 co-relation queries the response was YES. [2024-06-04 14:09:21,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71939 conditions, 9097 events. 5317/9097 cut-off events. For 1463339/1463347 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 68294 event pairs, 1932 based on Foata normal form. 45/9137 useless extension candidates. Maximal degree in co-relation 71775. Up to 7602 conditions per place. [2024-06-04 14:09:21,218 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 267 changer transitions 3/498 dead transitions. [2024-06-04 14:09:21,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 498 transitions, 9425 flow [2024-06-04 14:09:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:09:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:09:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:09:21,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 14:09:21,220 INFO L175 Difference]: Start difference. First operand has 344 places, 471 transitions, 8109 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:09:21,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 498 transitions, 9425 flow [2024-06-04 14:09:26,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 498 transitions, 8668 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-04 14:09:26,607 INFO L231 Difference]: Finished difference. Result has 346 places, 472 transitions, 7947 flow [2024-06-04 14:09:26,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7947, PETRI_PLACES=346, PETRI_TRANSITIONS=472} [2024-06-04 14:09:26,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-04 14:09:26,609 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 472 transitions, 7947 flow [2024-06-04 14:09:26,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:26,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:26,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:09:26,609 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)] === [2024-06-04 14:09:26,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash -938596365, now seen corresponding path program 3 times [2024-06-04 14:09:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867471706] [2024-06-04 14:09:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:26,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:26,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867471706] [2024-06-04 14:09:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867471706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:26,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:26,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125385308] [2024-06-04 14:09:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:26,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:26,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:26,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 472 transitions, 7947 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:26,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:26,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:26,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:28,461 INFO L124 PetriNetUnfolderBase]: 5415/9264 cut-off events. [2024-06-04 14:09:28,462 INFO L125 PetriNetUnfolderBase]: For 1461917/1461925 co-relation queries the response was YES. [2024-06-04 14:09:28,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72067 conditions, 9264 events. 5415/9264 cut-off events. For 1461917/1461925 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 69838 event pairs, 1916 based on Foata normal form. 39/9298 useless extension candidates. Maximal degree in co-relation 71903. Up to 7558 conditions per place. [2024-06-04 14:09:28,604 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 270 changer transitions 6/505 dead transitions. [2024-06-04 14:09:28,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 505 transitions, 9301 flow [2024-06-04 14:09:28,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:09:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:09:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 14:09:28,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 14:09:28,605 INFO L175 Difference]: Start difference. First operand has 346 places, 472 transitions, 7947 flow. Second operand 8 states and 195 transitions. [2024-06-04 14:09:28,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 505 transitions, 9301 flow [2024-06-04 14:09:33,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 505 transitions, 8741 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:09:33,809 INFO L231 Difference]: Finished difference. Result has 348 places, 473 transitions, 7966 flow [2024-06-04 14:09:33,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7966, PETRI_PLACES=348, PETRI_TRANSITIONS=473} [2024-06-04 14:09:33,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-04 14:09:33,809 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 473 transitions, 7966 flow [2024-06-04 14:09:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:33,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:33,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:33,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:09:33,810 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)] === [2024-06-04 14:09:33,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash -430007313, now seen corresponding path program 4 times [2024-06-04 14:09:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:33,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996123636] [2024-06-04 14:09:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:33,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996123636] [2024-06-04 14:09:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996123636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:33,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:33,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:33,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370427599] [2024-06-04 14:09:33,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:33,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:33,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:33,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:33,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 473 transitions, 7966 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:33,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:33,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:33,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:35,620 INFO L124 PetriNetUnfolderBase]: 5441/9333 cut-off events. [2024-06-04 14:09:35,620 INFO L125 PetriNetUnfolderBase]: For 1397073/1397073 co-relation queries the response was YES. [2024-06-04 14:09:35,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72696 conditions, 9333 events. 5441/9333 cut-off events. For 1397073/1397073 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 70558 event pairs, 1903 based on Foata normal form. 16/9348 useless extension candidates. Maximal degree in co-relation 72531. Up to 8551 conditions per place. [2024-06-04 14:09:35,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 55 changer transitions 0/495 dead transitions. [2024-06-04 14:09:35,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 495 transitions, 9060 flow [2024-06-04 14:09:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:09:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:09:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 14:09:35,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 14:09:35,751 INFO L175 Difference]: Start difference. First operand has 348 places, 473 transitions, 7966 flow. Second operand 9 states and 192 transitions. [2024-06-04 14:09:35,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 495 transitions, 9060 flow [2024-06-04 14:09:41,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 495 transitions, 8489 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:09:41,686 INFO L231 Difference]: Finished difference. Result has 351 places, 475 transitions, 7569 flow [2024-06-04 14:09:41,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7395, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7569, PETRI_PLACES=351, PETRI_TRANSITIONS=475} [2024-06-04 14:09:41,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-04 14:09:41,686 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 475 transitions, 7569 flow [2024-06-04 14:09:41,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:41,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:41,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:41,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:09:41,687 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)] === [2024-06-04 14:09:41,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:41,687 INFO L85 PathProgramCache]: Analyzing trace with hash -430155183, now seen corresponding path program 5 times [2024-06-04 14:09:41,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:41,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817923878] [2024-06-04 14:09:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:41,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:41,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:41,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817923878] [2024-06-04 14:09:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817923878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:41,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:41,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56799427] [2024-06-04 14:09:41,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:41,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:41,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:41,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 475 transitions, 7569 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:41,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:41,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:41,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:43,905 INFO L124 PetriNetUnfolderBase]: 5527/9471 cut-off events. [2024-06-04 14:09:43,906 INFO L125 PetriNetUnfolderBase]: For 1446937/1446937 co-relation queries the response was YES. [2024-06-04 14:09:43,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73951 conditions, 9471 events. 5527/9471 cut-off events. For 1446937/1446937 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 71655 event pairs, 1899 based on Foata normal form. 12/9482 useless extension candidates. Maximal degree in co-relation 73785. Up to 8511 conditions per place. [2024-06-04 14:09:44,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 62 changer transitions 0/502 dead transitions. [2024-06-04 14:09:44,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 502 transitions, 8927 flow [2024-06-04 14:09:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:09:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:09:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-04 14:09:44,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 14:09:44,025 INFO L175 Difference]: Start difference. First operand has 351 places, 475 transitions, 7569 flow. Second operand 9 states and 195 transitions. [2024-06-04 14:09:44,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 502 transitions, 8927 flow [2024-06-04 14:09:49,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 502 transitions, 8783 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 14:09:49,933 INFO L231 Difference]: Finished difference. Result has 353 places, 478 transitions, 7648 flow [2024-06-04 14:09:49,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7425, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7648, PETRI_PLACES=353, PETRI_TRANSITIONS=478} [2024-06-04 14:09:49,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-04 14:09:49,934 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 478 transitions, 7648 flow [2024-06-04 14:09:49,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:49,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:49,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:49,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:09:49,934 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)] === [2024-06-04 14:09:49,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1489917395, now seen corresponding path program 1 times [2024-06-04 14:09:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:49,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698711077] [2024-06-04 14:09:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:49,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:50,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:50,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698711077] [2024-06-04 14:09:50,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698711077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:50,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447985517] [2024-06-04 14:09:50,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:50,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:50,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 478 transitions, 7648 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:50,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:50,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:50,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:09:52,299 INFO L124 PetriNetUnfolderBase]: 5692/9692 cut-off events. [2024-06-04 14:09:52,300 INFO L125 PetriNetUnfolderBase]: For 1574825/1574825 co-relation queries the response was YES. [2024-06-04 14:09:52,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77955 conditions, 9692 events. 5692/9692 cut-off events. For 1574825/1574825 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 73118 event pairs, 1929 based on Foata normal form. 12/9703 useless extension candidates. Maximal degree in co-relation 77788. Up to 8757 conditions per place. [2024-06-04 14:09:52,432 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 39 changer transitions 0/508 dead transitions. [2024-06-04 14:09:52,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 508 transitions, 9081 flow [2024-06-04 14:09:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:09:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:09:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 14:09:52,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 14:09:52,433 INFO L175 Difference]: Start difference. First operand has 353 places, 478 transitions, 7648 flow. Second operand 9 states and 192 transitions. [2024-06-04 14:09:52,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 508 transitions, 9081 flow [2024-06-04 14:09:57,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 508 transitions, 8973 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 14:09:57,816 INFO L231 Difference]: Finished difference. Result has 358 places, 484 transitions, 7804 flow [2024-06-04 14:09:57,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7540, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7804, PETRI_PLACES=358, PETRI_TRANSITIONS=484} [2024-06-04 14:09:57,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-04 14:09:57,817 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 484 transitions, 7804 flow [2024-06-04 14:09:57,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:57,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:09:57,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:09:57,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:09:57,818 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)] === [2024-06-04 14:09:57,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:09:57,819 INFO L85 PathProgramCache]: Analyzing trace with hash -15537327, now seen corresponding path program 6 times [2024-06-04 14:09:57,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:09:57,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44386261] [2024-06-04 14:09:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:09:57,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:09:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:09:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:09:57,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:09:57,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44386261] [2024-06-04 14:09:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44386261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:09:57,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:09:57,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:09:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811129046] [2024-06-04 14:09:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:09:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:09:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:09:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:09:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:09:57,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:09:57,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 484 transitions, 7804 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:09:57,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:09:57,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:09:57,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:10:00,371 INFO L124 PetriNetUnfolderBase]: 5811/9937 cut-off events. [2024-06-04 14:10:00,371 INFO L125 PetriNetUnfolderBase]: For 1746175/1746175 co-relation queries the response was YES. [2024-06-04 14:10:00,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79345 conditions, 9937 events. 5811/9937 cut-off events. For 1746175/1746175 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 75677 event pairs, 2031 based on Foata normal form. 42/9978 useless extension candidates. Maximal degree in co-relation 79175. Up to 8592 conditions per place. [2024-06-04 14:10:00,507 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 167 changer transitions 3/521 dead transitions. [2024-06-04 14:10:00,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 521 transitions, 9202 flow [2024-06-04 14:10:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:10:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:10:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 14:10:00,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 14:10:00,508 INFO L175 Difference]: Start difference. First operand has 358 places, 484 transitions, 7804 flow. Second operand 9 states and 216 transitions. [2024-06-04 14:10:00,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 521 transitions, 9202 flow [2024-06-04 14:10:05,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 521 transitions, 9089 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 14:10:05,936 INFO L231 Difference]: Finished difference. Result has 362 places, 485 transitions, 8085 flow [2024-06-04 14:10:05,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8085, PETRI_PLACES=362, PETRI_TRANSITIONS=485} [2024-06-04 14:10:05,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-04 14:10:05,936 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 485 transitions, 8085 flow [2024-06-04 14:10:05,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:05,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:10:05,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:10:05,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:10:05,937 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)] === [2024-06-04 14:10:05,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:10:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash -15685197, now seen corresponding path program 7 times [2024-06-04 14:10:05,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:10:05,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236468403] [2024-06-04 14:10:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:10:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:10:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:10:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:10:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:10:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236468403] [2024-06-04 14:10:06,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236468403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:10:06,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:10:06,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:10:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409226475] [2024-06-04 14:10:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:10:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:10:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:10:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:10:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:10:06,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:10:06,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 485 transitions, 8085 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:06,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:10:06,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:10:06,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:10:08,677 INFO L124 PetriNetUnfolderBase]: 6049/10349 cut-off events. [2024-06-04 14:10:08,678 INFO L125 PetriNetUnfolderBase]: For 1900622/1900622 co-relation queries the response was YES. [2024-06-04 14:10:08,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84351 conditions, 10349 events. 6049/10349 cut-off events. For 1900622/1900622 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 79534 event pairs, 1893 based on Foata normal form. 36/10384 useless extension candidates. Maximal degree in co-relation 84180. Up to 8039 conditions per place. [2024-06-04 14:10:08,821 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 183 changer transitions 4/532 dead transitions. [2024-06-04 14:10:08,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 532 transitions, 9763 flow [2024-06-04 14:10:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:10:08,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:10:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-04 14:10:08,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 14:10:08,822 INFO L175 Difference]: Start difference. First operand has 362 places, 485 transitions, 8085 flow. Second operand 9 states and 225 transitions. [2024-06-04 14:10:08,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 532 transitions, 9763 flow [2024-06-04 14:10:16,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 532 transitions, 9471 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 14:10:16,280 INFO L231 Difference]: Finished difference. Result has 365 places, 486 transitions, 8206 flow [2024-06-04 14:10:16,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7793, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8206, PETRI_PLACES=365, PETRI_TRANSITIONS=486} [2024-06-04 14:10:16,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-04 14:10:16,280 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 486 transitions, 8206 flow [2024-06-04 14:10:16,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:16,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:10:16,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:10:16,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:10:16,281 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)] === [2024-06-04 14:10:16,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:10:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1534958687, now seen corresponding path program 2 times [2024-06-04 14:10:16,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:10:16,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853650374] [2024-06-04 14:10:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:10:16,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:10:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:10:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:10:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:10:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853650374] [2024-06-04 14:10:16,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853650374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:10:16,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:10:16,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:10:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625350851] [2024-06-04 14:10:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:10:16,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:10:16,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:10:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:10:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:10:16,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:10:16,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 486 transitions, 8206 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:16,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:10:16,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:10:16,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:10:19,023 INFO L124 PetriNetUnfolderBase]: 6301/10769 cut-off events. [2024-06-04 14:10:19,023 INFO L125 PetriNetUnfolderBase]: For 2070898/2070898 co-relation queries the response was YES. [2024-06-04 14:10:19,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89385 conditions, 10769 events. 6301/10769 cut-off events. For 2070898/2070898 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 83389 event pairs, 1888 based on Foata normal form. 42/10806 useless extension candidates. Maximal degree in co-relation 89213. Up to 8516 conditions per place. [2024-06-04 14:10:19,170 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 128 changer transitions 0/537 dead transitions. [2024-06-04 14:10:19,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 537 transitions, 9812 flow [2024-06-04 14:10:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:10:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:10:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:10:19,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-04 14:10:19,172 INFO L175 Difference]: Start difference. First operand has 365 places, 486 transitions, 8206 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:10:19,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 537 transitions, 9812 flow [2024-06-04 14:10:26,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 537 transitions, 9451 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:10:26,809 INFO L231 Difference]: Finished difference. Result has 368 places, 494 transitions, 8379 flow [2024-06-04 14:10:26,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7851, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8379, PETRI_PLACES=368, PETRI_TRANSITIONS=494} [2024-06-04 14:10:26,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-04 14:10:26,810 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 494 transitions, 8379 flow [2024-06-04 14:10:26,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:26,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:10:26,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:10:26,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:10:26,810 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)] === [2024-06-04 14:10:26,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:10:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1269261407, now seen corresponding path program 3 times [2024-06-04 14:10:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:10:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657886357] [2024-06-04 14:10:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:10:26,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:10:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:10:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:10:26,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:10:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657886357] [2024-06-04 14:10:26,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657886357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:10:26,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:10:26,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:10:26,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669413248] [2024-06-04 14:10:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:10:26,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:10:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:10:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:10:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:10:26,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:10:26,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 494 transitions, 8379 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:26,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:10:26,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:10:26,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:10:29,704 INFO L124 PetriNetUnfolderBase]: 6399/10990 cut-off events. [2024-06-04 14:10:29,704 INFO L125 PetriNetUnfolderBase]: For 1997998/1998000 co-relation queries the response was YES. [2024-06-04 14:10:29,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89387 conditions, 10990 events. 6399/10990 cut-off events. For 1997998/1998000 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 85253 event pairs, 1817 based on Foata normal form. 44/11033 useless extension candidates. Maximal degree in co-relation 89213. Up to 6224 conditions per place. [2024-06-04 14:10:29,851 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 419 selfloop transitions, 114 changer transitions 0/539 dead transitions. [2024-06-04 14:10:29,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 539 transitions, 10075 flow [2024-06-04 14:10:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:10:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:10:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 14:10:29,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-04 14:10:29,852 INFO L175 Difference]: Start difference. First operand has 368 places, 494 transitions, 8379 flow. Second operand 7 states and 188 transitions. [2024-06-04 14:10:29,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 539 transitions, 10075 flow [2024-06-04 14:10:37,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 539 transitions, 9799 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 14:10:37,858 INFO L231 Difference]: Finished difference. Result has 369 places, 496 transitions, 8409 flow [2024-06-04 14:10:37,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8409, PETRI_PLACES=369, PETRI_TRANSITIONS=496} [2024-06-04 14:10:37,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-04 14:10:37,859 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 496 transitions, 8409 flow [2024-06-04 14:10:37,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:37,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:10:37,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:10:37,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:10:37,859 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)] === [2024-06-04 14:10:37,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:10:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1530992112, now seen corresponding path program 1 times [2024-06-04 14:10:37,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:10:37,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594181154] [2024-06-04 14:10:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:10:37,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:10:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:10:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:10:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:10:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594181154] [2024-06-04 14:10:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594181154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:10:37,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:10:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:10:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474824061] [2024-06-04 14:10:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:10:37,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:10:37,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:10:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:10:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:10:37,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:10:37,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 496 transitions, 8409 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:37,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:10:37,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:10:37,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:10:40,622 INFO L124 PetriNetUnfolderBase]: 6466/11065 cut-off events. [2024-06-04 14:10:40,623 INFO L125 PetriNetUnfolderBase]: For 1822724/1822724 co-relation queries the response was YES. [2024-06-04 14:10:40,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90298 conditions, 11065 events. 6466/11065 cut-off events. For 1822724/1822724 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 86104 event pairs, 2135 based on Foata normal form. 2/11059 useless extension candidates. Maximal degree in co-relation 90124. Up to 9435 conditions per place. [2024-06-04 14:10:40,767 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 406 selfloop transitions, 125 changer transitions 0/537 dead transitions. [2024-06-04 14:10:40,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 537 transitions, 10210 flow [2024-06-04 14:10:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:10:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:10:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:10:40,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 14:10:40,768 INFO L175 Difference]: Start difference. First operand has 369 places, 496 transitions, 8409 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:10:40,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 537 transitions, 10210 flow [2024-06-04 14:10:47,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 537 transitions, 9940 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 14:10:47,249 INFO L231 Difference]: Finished difference. Result has 373 places, 504 transitions, 8631 flow [2024-06-04 14:10:47,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8151, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8631, PETRI_PLACES=373, PETRI_TRANSITIONS=504} [2024-06-04 14:10:47,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-04 14:10:47,249 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 504 transitions, 8631 flow [2024-06-04 14:10:47,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:47,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:10:47,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:10:47,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:10:47,250 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)] === [2024-06-04 14:10:47,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:10:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1956002796, now seen corresponding path program 2 times [2024-06-04 14:10:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:10:47,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39596194] [2024-06-04 14:10:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:10:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:10:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:10:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:10:47,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:10:47,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39596194] [2024-06-04 14:10:47,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39596194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:10:47,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:10:47,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:10:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825570636] [2024-06-04 14:10:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:10:47,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:10:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:10:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:10:47,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:10:47,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:10:47,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 504 transitions, 8631 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:47,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:10:47,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:10:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:10:49,950 INFO L124 PetriNetUnfolderBase]: 6533/11170 cut-off events. [2024-06-04 14:10:49,950 INFO L125 PetriNetUnfolderBase]: For 1872080/1872080 co-relation queries the response was YES. [2024-06-04 14:10:50,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91586 conditions, 11170 events. 6533/11170 cut-off events. For 1872080/1872080 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 86884 event pairs, 2126 based on Foata normal form. 2/11164 useless extension candidates. Maximal degree in co-relation 91411. Up to 9479 conditions per place. [2024-06-04 14:10:50,100 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 406 selfloop transitions, 129 changer transitions 1/542 dead transitions. [2024-06-04 14:10:50,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 542 transitions, 10408 flow [2024-06-04 14:10:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:10:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:10:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:10:50,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 14:10:50,101 INFO L175 Difference]: Start difference. First operand has 373 places, 504 transitions, 8631 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:10:50,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 542 transitions, 10408 flow [2024-06-04 14:10:57,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 542 transitions, 10197 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-04 14:10:57,739 INFO L231 Difference]: Finished difference. Result has 378 places, 508 transitions, 8775 flow [2024-06-04 14:10:57,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8775, PETRI_PLACES=378, PETRI_TRANSITIONS=508} [2024-06-04 14:10:57,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-04 14:10:57,740 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 508 transitions, 8775 flow [2024-06-04 14:10:57,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:10:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:10:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:10:57,740 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)] === [2024-06-04 14:10:57,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:10:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1903624266, now seen corresponding path program 3 times [2024-06-04 14:10:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:10:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666048787] [2024-06-04 14:10:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:10:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:10:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:10:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:10:57,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:10:57,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666048787] [2024-06-04 14:10:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666048787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:10:57,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:10:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:10:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529081299] [2024-06-04 14:10:57,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:10:57,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:10:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:10:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:10:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:10:57,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:10:57,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 508 transitions, 8775 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:10:57,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:10:57,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:10:57,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:11:00,367 INFO L124 PetriNetUnfolderBase]: 6528/11188 cut-off events. [2024-06-04 14:11:00,367 INFO L125 PetriNetUnfolderBase]: For 1900337/1900337 co-relation queries the response was YES. [2024-06-04 14:11:00,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92089 conditions, 11188 events. 6528/11188 cut-off events. For 1900337/1900337 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 87607 event pairs, 2444 based on Foata normal form. 2/11177 useless extension candidates. Maximal degree in co-relation 91912. Up to 10095 conditions per place. [2024-06-04 14:11:00,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 416 selfloop transitions, 115 changer transitions 0/537 dead transitions. [2024-06-04 14:11:00,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 10155 flow [2024-06-04 14:11:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:11:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:11:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:11:00,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 14:11:00,690 INFO L175 Difference]: Start difference. First operand has 378 places, 508 transitions, 8775 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:11:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 10155 flow [2024-06-04 14:11:08,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 537 transitions, 9928 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:11:08,685 INFO L231 Difference]: Finished difference. Result has 383 places, 511 transitions, 8849 flow [2024-06-04 14:11:08,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8553, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8849, PETRI_PLACES=383, PETRI_TRANSITIONS=511} [2024-06-04 14:11:08,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-04 14:11:08,686 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 511 transitions, 8849 flow [2024-06-04 14:11:08,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:08,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:11:08,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:11:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:11:08,686 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)] === [2024-06-04 14:11:08,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:11:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 123922154, now seen corresponding path program 4 times [2024-06-04 14:11:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:11:08,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070417340] [2024-06-04 14:11:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:11:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:11:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:11:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:11:08,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:11:08,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070417340] [2024-06-04 14:11:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070417340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:11:08,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:11:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:11:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180269826] [2024-06-04 14:11:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:11:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:11:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:11:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:11:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:11:08,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:11:08,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 511 transitions, 8849 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:08,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:11:08,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:11:08,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:11:11,570 INFO L124 PetriNetUnfolderBase]: 6536/11208 cut-off events. [2024-06-04 14:11:11,571 INFO L125 PetriNetUnfolderBase]: For 1936451/1936451 co-relation queries the response was YES. [2024-06-04 14:11:11,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92453 conditions, 11208 events. 6536/11208 cut-off events. For 1936451/1936451 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 87782 event pairs, 2454 based on Foata normal form. 2/11205 useless extension candidates. Maximal degree in co-relation 92274. Up to 10147 conditions per place. [2024-06-04 14:11:11,717 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 418 selfloop transitions, 110 changer transitions 0/534 dead transitions. [2024-06-04 14:11:11,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 534 transitions, 10007 flow [2024-06-04 14:11:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:11:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:11:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 14:11:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 14:11:11,719 INFO L175 Difference]: Start difference. First operand has 383 places, 511 transitions, 8849 flow. Second operand 7 states and 163 transitions. [2024-06-04 14:11:11,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 534 transitions, 10007 flow [2024-06-04 14:11:19,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 534 transitions, 9716 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 14:11:19,242 INFO L231 Difference]: Finished difference. Result has 386 places, 513 transitions, 8837 flow [2024-06-04 14:11:19,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8837, PETRI_PLACES=386, PETRI_TRANSITIONS=513} [2024-06-04 14:11:19,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-04 14:11:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 513 transitions, 8837 flow [2024-06-04 14:11:19,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:19,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:11:19,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:11:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:11:19,244 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)] === [2024-06-04 14:11:19,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:11:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1948777536, now seen corresponding path program 5 times [2024-06-04 14:11:19,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:11:19,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834489210] [2024-06-04 14:11:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:11:19,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:11:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:11:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:11:19,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:11:19,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834489210] [2024-06-04 14:11:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834489210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:11:19,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:11:19,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:11:19,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487821402] [2024-06-04 14:11:19,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:11:19,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:11:19,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:11:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:11:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:11:19,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:11:19,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 513 transitions, 8837 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:19,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:11:19,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:11:19,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:11:22,070 INFO L124 PetriNetUnfolderBase]: 6577/11245 cut-off events. [2024-06-04 14:11:22,070 INFO L125 PetriNetUnfolderBase]: For 2002904/2002904 co-relation queries the response was YES. [2024-06-04 14:11:22,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93656 conditions, 11245 events. 6577/11245 cut-off events. For 2002904/2002904 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 87870 event pairs, 2449 based on Foata normal form. 2/11230 useless extension candidates. Maximal degree in co-relation 93476. Up to 10073 conditions per place. [2024-06-04 14:11:22,231 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 418 selfloop transitions, 113 changer transitions 1/538 dead transitions. [2024-06-04 14:11:22,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 538 transitions, 10235 flow [2024-06-04 14:11:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:11:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:11:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:11:22,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 14:11:22,233 INFO L175 Difference]: Start difference. First operand has 386 places, 513 transitions, 8837 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:11:22,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 538 transitions, 10235 flow [2024-06-04 14:11:28,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 538 transitions, 10004 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 14:11:28,687 INFO L231 Difference]: Finished difference. Result has 389 places, 514 transitions, 8874 flow [2024-06-04 14:11:28,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8874, PETRI_PLACES=389, PETRI_TRANSITIONS=514} [2024-06-04 14:11:28,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-04 14:11:28,687 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 514 transitions, 8874 flow [2024-06-04 14:11:28,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:28,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:11:28,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:11:28,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:11:28,688 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)] === [2024-06-04 14:11:28,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:11:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1988502548, now seen corresponding path program 6 times [2024-06-04 14:11:28,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:11:28,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875656532] [2024-06-04 14:11:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:11:28,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:11:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:11:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:11:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:11:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875656532] [2024-06-04 14:11:28,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875656532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:11:28,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:11:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:11:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746904353] [2024-06-04 14:11:28,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:11:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:11:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:11:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:11:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:11:28,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:11:28,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 514 transitions, 8874 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:28,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:11:28,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:11:28,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:11:31,417 INFO L124 PetriNetUnfolderBase]: 6572/11268 cut-off events. [2024-06-04 14:11:31,417 INFO L125 PetriNetUnfolderBase]: For 2028524/2028524 co-relation queries the response was YES. [2024-06-04 14:11:31,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93966 conditions, 11268 events. 6572/11268 cut-off events. For 2028524/2028524 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 88231 event pairs, 2478 based on Foata normal form. 2/11265 useless extension candidates. Maximal degree in co-relation 93784. Up to 10203 conditions per place. [2024-06-04 14:11:31,572 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 420 selfloop transitions, 106 changer transitions 0/532 dead transitions. [2024-06-04 14:11:31,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 532 transitions, 9970 flow [2024-06-04 14:11:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:11:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:11:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 14:11:31,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 14:11:31,574 INFO L175 Difference]: Start difference. First operand has 389 places, 514 transitions, 8874 flow. Second operand 7 states and 161 transitions. [2024-06-04 14:11:31,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 532 transitions, 9970 flow [2024-06-04 14:11:38,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 532 transitions, 9744 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:11:38,779 INFO L231 Difference]: Finished difference. Result has 392 places, 514 transitions, 8865 flow [2024-06-04 14:11:38,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8648, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8865, PETRI_PLACES=392, PETRI_TRANSITIONS=514} [2024-06-04 14:11:38,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-04 14:11:38,780 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 514 transitions, 8865 flow [2024-06-04 14:11:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:38,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:11:38,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:11:38,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:11:38,781 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)] === [2024-06-04 14:11:38,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:11:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -504442930, now seen corresponding path program 1 times [2024-06-04 14:11:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:11:38,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456353553] [2024-06-04 14:11:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:11:38,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:11:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:11:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:11:38,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:11:38,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456353553] [2024-06-04 14:11:38,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456353553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:11:38,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:11:38,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:11:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623554896] [2024-06-04 14:11:38,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:11:38,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:11:38,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:11:38,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:11:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:11:38,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:11:38,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 514 transitions, 8865 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:38,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:11:38,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:11:38,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:11:41,583 INFO L124 PetriNetUnfolderBase]: 6608/11325 cut-off events. [2024-06-04 14:11:41,584 INFO L125 PetriNetUnfolderBase]: For 2110814/2110814 co-relation queries the response was YES. [2024-06-04 14:11:41,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94469 conditions, 11325 events. 6608/11325 cut-off events. For 2110814/2110814 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 88772 event pairs, 2480 based on Foata normal form. 10/11330 useless extension candidates. Maximal degree in co-relation 94286. Up to 10227 conditions per place. [2024-06-04 14:11:41,746 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 111 changer transitions 0/541 dead transitions. [2024-06-04 14:11:41,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 541 transitions, 10043 flow [2024-06-04 14:11:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:11:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:11:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 14:11:41,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 14:11:41,747 INFO L175 Difference]: Start difference. First operand has 392 places, 514 transitions, 8865 flow. Second operand 8 states and 184 transitions. [2024-06-04 14:11:41,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 541 transitions, 10043 flow [2024-06-04 14:11:50,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 541 transitions, 9820 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 14:11:50,704 INFO L231 Difference]: Finished difference. Result has 395 places, 516 transitions, 8910 flow [2024-06-04 14:11:50,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8642, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8910, PETRI_PLACES=395, PETRI_TRANSITIONS=516} [2024-06-04 14:11:50,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-04 14:11:50,705 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 516 transitions, 8910 flow [2024-06-04 14:11:50,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:11:50,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:11:50,705 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, 1] [2024-06-04 14:11:50,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:11:50,706 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)] === [2024-06-04 14:11:50,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:11:50,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1184534897, now seen corresponding path program 1 times [2024-06-04 14:11:50,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:11:50,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569176678] [2024-06-04 14:11:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:11:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:11:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:11:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:11:50,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:11:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569176678] [2024-06-04 14:11:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569176678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:11:50,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:11:50,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:11:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133775057] [2024-06-04 14:11:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:11:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:11:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:11:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:11:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:11:50,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:11:50,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 516 transitions, 8910 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-04 14:11:50,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:11:50,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:11:50,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:11:53,684 INFO L124 PetriNetUnfolderBase]: 6645/11406 cut-off events. [2024-06-04 14:11:53,684 INFO L125 PetriNetUnfolderBase]: For 2122697/2122707 co-relation queries the response was YES. [2024-06-04 14:11:53,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95775 conditions, 11406 events. 6645/11406 cut-off events. For 2122697/2122707 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 89526 event pairs, 2542 based on Foata normal form. 11/11415 useless extension candidates. Maximal degree in co-relation 95591. Up to 9943 conditions per place. [2024-06-04 14:11:53,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 297 selfloop transitions, 250 changer transitions 0/553 dead transitions. [2024-06-04 14:11:53,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 553 transitions, 10754 flow [2024-06-04 14:11:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:11:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:11:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 14:11:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 14:11:53,842 INFO L175 Difference]: Start difference. First operand has 395 places, 516 transitions, 8910 flow. Second operand 7 states and 165 transitions. [2024-06-04 14:11:53,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 553 transitions, 10754 flow [2024-06-04 14:12:01,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 553 transitions, 10531 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 14:12:01,645 INFO L231 Difference]: Finished difference. Result has 397 places, 531 transitions, 9461 flow [2024-06-04 14:12:01,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8687, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9461, PETRI_PLACES=397, PETRI_TRANSITIONS=531} [2024-06-04 14:12:01,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-04 14:12:01,646 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 531 transitions, 9461 flow [2024-06-04 14:12:01,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-04 14:12:01,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:12:01,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:12:01,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:12:01,646 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)] === [2024-06-04 14:12:01,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:12:01,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1854871973, now seen corresponding path program 2 times [2024-06-04 14:12:01,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:12:01,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958102402] [2024-06-04 14:12:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:12:01,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:12:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:12:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:12:01,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:12:01,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958102402] [2024-06-04 14:12:01,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958102402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:12:01,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:12:01,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:12:01,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021446922] [2024-06-04 14:12:01,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:12:01,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:12:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:12:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:12:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:12:01,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:12:01,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 531 transitions, 9461 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:12:01,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:12:01,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:12:01,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:12:04,531 INFO L124 PetriNetUnfolderBase]: 6650/11386 cut-off events. [2024-06-04 14:12:04,531 INFO L125 PetriNetUnfolderBase]: For 2162883/2162883 co-relation queries the response was YES. [2024-06-04 14:12:04,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96488 conditions, 11386 events. 6650/11386 cut-off events. For 2162883/2162883 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 89229 event pairs, 2516 based on Foata normal form. 1/11382 useless extension candidates. Maximal degree in co-relation 96303. Up to 9949 conditions per place. [2024-06-04 14:12:04,691 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 267 changer transitions 0/560 dead transitions. [2024-06-04 14:12:04,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 560 transitions, 11107 flow [2024-06-04 14:12:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:12:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:12:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:12:04,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 14:12:04,692 INFO L175 Difference]: Start difference. First operand has 397 places, 531 transitions, 9461 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:12:04,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 560 transitions, 11107 flow [2024-06-04 14:12:11,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 560 transitions, 10583 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 14:12:11,978 INFO L231 Difference]: Finished difference. Result has 401 places, 534 transitions, 9519 flow [2024-06-04 14:12:11,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8943, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9519, PETRI_PLACES=401, PETRI_TRANSITIONS=534} [2024-06-04 14:12:11,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-04 14:12:11,978 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 534 transitions, 9519 flow [2024-06-04 14:12:11,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:12:11,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:12:11,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:12:11,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:12:11,979 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)] === [2024-06-04 14:12:11,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:12:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash -812606141, now seen corresponding path program 3 times [2024-06-04 14:12:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:12:11,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830147195] [2024-06-04 14:12:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:12:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:12:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:12:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:12:12,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:12:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830147195] [2024-06-04 14:12:12,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830147195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:12:12,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:12:12,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:12:12,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32329040] [2024-06-04 14:12:12,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:12:12,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:12:12,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:12:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:12:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:12:12,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 14:12:12,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 534 transitions, 9519 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:12:12,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:12:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 14:12:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:12:14,864 INFO L124 PetriNetUnfolderBase]: 6655/11396 cut-off events. [2024-06-04 14:12:14,865 INFO L125 PetriNetUnfolderBase]: For 2201332/2201332 co-relation queries the response was YES. [2024-06-04 14:12:14,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96992 conditions, 11396 events. 6655/11396 cut-off events. For 2201332/2201332 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 89363 event pairs, 2515 based on Foata normal form. 1/11392 useless extension candidates. Maximal degree in co-relation 96807. Up to 9955 conditions per place. [2024-06-04 14:12:15,031 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 270 changer transitions 0/563 dead transitions. [2024-06-04 14:12:15,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 563 transitions, 11179 flow [2024-06-04 14:12:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:12:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:12:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:12:15,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 14:12:15,032 INFO L175 Difference]: Start difference. First operand has 401 places, 534 transitions, 9519 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:12:15,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 563 transitions, 11179 flow