./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe037.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/safe037.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/safe037.i ./goblint.2024-05-21_14-57-05.files/protection/safe037.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 14:25:09,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:25:09,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:25:09,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:25:09,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:25:09,881 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:25:09,884 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:25:09,884 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:25:09,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:25:09,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:25:09,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:25:09,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:25:09,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:25:09,891 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:25:09,891 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:25:09,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:25:09,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:25:09,892 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:25:09,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:25:09,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:25:09,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:25:09,893 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:25:09,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:25:09,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:25:09,894 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:25:09,894 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:25:09,894 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:25:09,895 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:25:09,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:25:09,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:25:09,896 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:25:09,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:25:09,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:25:09,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:25:09,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:25:09,897 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:25:09,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:25:09,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:25:09,898 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:25:09,898 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:25:09,898 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:25:09,898 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:25:09,899 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:25:09,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:25:10,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:25:10,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:25:10,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:25:10,137 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:25:10,137 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:25:10,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-04 14:25:11,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:25:11,466 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:25:11,467 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-04 14:25:11,478 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4d070758/03b73a6ddcd842edba32ac7a547846b6/FLAG26019fa45 [2024-06-04 14:25:11,490 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4d070758/03b73a6ddcd842edba32ac7a547846b6 [2024-06-04 14:25:11,492 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:25:11,492 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:25:11,493 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe037.yml/witness.yml [2024-06-04 14:25:11,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:25:11,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:25:11,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:25:11,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:25:11,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:25:11,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:25:11" (1/2) ... [2024-06-04 14:25:11,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c8e146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:25:11, skipping insertion in model container [2024-06-04 14:25:11,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:25:11" (1/2) ... [2024-06-04 14:25:11,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4325acd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:25:11, skipping insertion in model container [2024-06-04 14:25:11,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:25:11" (2/2) ... [2024-06-04 14:25:11,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c8e146 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:11, skipping insertion in model container [2024-06-04 14:25:11,616 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:25:11" (2/2) ... [2024-06-04 14:25:11,616 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:25:11,657 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:25:11,659 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-04 14:25:11,659 INFO L97 edCorrectnessWitness]: Location invariant before [L792-L792] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-04 14:25:11,659 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-04 14:25:11,659 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:25:11,659 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-04 14:25:11,700 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:25:11,982 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:25:11,990 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:25:12,057 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:25:12,085 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:25:12,086 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12 WrapperNode [2024-06-04 14:25:12,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:25:12,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:25:12,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:25:12,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:25:12,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,163 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-04 14:25:12,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:25:12,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:25:12,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:25:12,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:25:12,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,174 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,184 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 14:25:12,184 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:25:12,196 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:25:12,196 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:25:12,196 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:25:12,197 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (1/1) ... [2024-06-04 14:25:12,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:25:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:25:12,220 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 14:25:12,254 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 14:25:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:25:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:25:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:25:12,267 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:25:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:25:12,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:25:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:25:12,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:25:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:25:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:25:12,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:25:12,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:25:12,270 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 14:25:12,393 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:25:12,396 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:25:12,601 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:25:12,602 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:25:12,668 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:25:12,672 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:25:12,672 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:25:12 BoogieIcfgContainer [2024-06-04 14:25:12,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:25:12,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:25:12,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:25:12,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:25:12,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:25:11" (1/4) ... [2024-06-04 14:25:12,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c58f98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:25:12, skipping insertion in model container [2024-06-04 14:25:12,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:25:11" (2/4) ... [2024-06-04 14:25:12,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c58f98a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:25:12, skipping insertion in model container [2024-06-04 14:25:12,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:25:12" (3/4) ... [2024-06-04 14:25:12,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c58f98a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:25:12, skipping insertion in model container [2024-06-04 14:25:12,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:25:12" (4/4) ... [2024-06-04 14:25:12,678 INFO L112 eAbstractionObserver]: Analyzing ICFG safe037.i [2024-06-04 14:25:12,690 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:25:12,690 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:25:12,690 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:25:12,742 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:25:12,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:25:12,793 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-04 14:25:12,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:25:12,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:25:12,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:25:12,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-04 14:25:12,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:25:12,814 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;@35732abc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:25:12,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:25:12,817 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:25:12,818 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:25:12,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:25:12,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:12,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:25:12,819 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 14:25:12,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1558372378, now seen corresponding path program 1 times [2024-06-04 14:25:12,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:12,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207220929] [2024-06-04 14:25:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:13,256 INFO 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 14:25:13,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:13,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207220929] [2024-06-04 14:25:13,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207220929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:13,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:13,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:25:13,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773444944] [2024-06-04 14:25:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:13,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:25:13,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:25:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:25:13,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-06-04 14:25:13,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:13,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:13,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-06-04 14:25:13,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:13,491 INFO L124 PetriNetUnfolderBase]: 471/887 cut-off events. [2024-06-04 14:25:13,491 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-04 14:25:13,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 887 events. 471/887 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4817 event pairs, 288 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 1662. Up to 733 conditions per place. [2024-06-04 14:25:13,506 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 29 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-04 14:25:13,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 171 flow [2024-06-04 14:25:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:25:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:25:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-04 14:25:13,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-06-04 14:25:13,517 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 93 transitions. [2024-06-04 14:25:13,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 171 flow [2024-06-04 14:25:13,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:13,523 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-04 14:25:13,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-04 14:25:13,527 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-04 14:25:13,528 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-04 14:25:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:13,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:13,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:13,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:25:13,529 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 14:25:13,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1347776261, now seen corresponding path program 1 times [2024-06-04 14:25:13,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:13,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280298081] [2024-06-04 14:25:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:13,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:13,719 INFO 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 14:25:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280298081] [2024-06-04 14:25:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280298081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:13,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:25:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749834930] [2024-06-04 14:25:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:13,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:25:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:25:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:25:13,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-04 14:25:13,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 14:25:13,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:13,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-04 14:25:13,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:13,851 INFO L124 PetriNetUnfolderBase]: 569/991 cut-off events. [2024-06-04 14:25:13,851 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-06-04 14:25:13,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 991 events. 569/991 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5233 event pairs, 293 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 2213. Up to 861 conditions per place. [2024-06-04 14:25:13,877 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:25:13,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 240 flow [2024-06-04 14:25:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:25:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:25:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-04 14:25:13,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2024-06-04 14:25:13,880 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 119 transitions. [2024-06-04 14:25:13,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 240 flow [2024-06-04 14:25:13,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:25:13,882 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-04 14:25:13,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-04 14:25:13,882 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-04 14:25:13,882 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-04 14:25:13,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 14:25:13,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:13,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:13,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:25:13,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:13,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:13,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1155941006, now seen corresponding path program 1 times [2024-06-04 14:25:13,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:13,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038273789] [2024-06-04 14:25:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:13,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:14,022 INFO 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 14:25:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038273789] [2024-06-04 14:25:14,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038273789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:14,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:14,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:25:14,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227852075] [2024-06-04 14:25:14,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:14,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:25:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:25:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:25:14,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-04 14:25:14,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:14,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:14,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-04 14:25:14,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:14,173 INFO L124 PetriNetUnfolderBase]: 590/1136 cut-off events. [2024-06-04 14:25:14,173 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2024-06-04 14:25:14,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2723 conditions, 1136 events. 590/1136 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6345 event pairs, 313 based on Foata normal form. 2/1112 useless extension candidates. Maximal degree in co-relation 2706. Up to 903 conditions per place. [2024-06-04 14:25:14,178 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:25:14,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 270 flow [2024-06-04 14:25:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:25:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:25:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-04 14:25:14,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-04 14:25:14,180 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 4 states and 115 transitions. [2024-06-04 14:25:14,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 270 flow [2024-06-04 14:25:14,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:14,182 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 168 flow [2024-06-04 14:25:14,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-04 14:25:14,182 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-06-04 14:25:14,182 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 168 flow [2024-06-04 14:25:14,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:14,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:14,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:14,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:25:14,183 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 14:25:14,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1786628943, now seen corresponding path program 1 times [2024-06-04 14:25:14,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:14,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474523619] [2024-06-04 14:25:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:14,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:14,337 INFO 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 14:25:14,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:14,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474523619] [2024-06-04 14:25:14,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474523619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:14,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:14,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:14,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898898630] [2024-06-04 14:25:14,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:14,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:14,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:14,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:14,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:14,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:14,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:14,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:14,551 INFO L124 PetriNetUnfolderBase]: 714/1293 cut-off events. [2024-06-04 14:25:14,552 INFO L125 PetriNetUnfolderBase]: For 1149/1197 co-relation queries the response was YES. [2024-06-04 14:25:14,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1293 events. 714/1293 cut-off events. For 1149/1197 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7077 event pairs, 212 based on Foata normal form. 6/1264 useless extension candidates. Maximal degree in co-relation 3411. Up to 1030 conditions per place. [2024-06-04 14:25:14,558 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 52 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-04 14:25:14,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 380 flow [2024-06-04 14:25:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-04 14:25:14,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-06-04 14:25:14,560 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 168 flow. Second operand 6 states and 166 transitions. [2024-06-04 14:25:14,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 380 flow [2024-06-04 14:25:14,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:14,562 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 211 flow [2024-06-04 14:25:14,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-04 14:25:14,563 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-04 14:25:14,563 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 211 flow [2024-06-04 14:25:14,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:14,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:14,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:14,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:25:14,564 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 14:25:14,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash -915401911, now seen corresponding path program 1 times [2024-06-04 14:25:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:14,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175740463] [2024-06-04 14:25:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:14,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175740463] [2024-06-04 14:25:14,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175740463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:14,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:14,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:25:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394326204] [2024-06-04 14:25:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:25:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:25:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:25:14,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:14,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:14,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:14,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:14,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:14,876 INFO L124 PetriNetUnfolderBase]: 725/1301 cut-off events. [2024-06-04 14:25:14,876 INFO L125 PetriNetUnfolderBase]: For 1865/1915 co-relation queries the response was YES. [2024-06-04 14:25:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 1301 events. 725/1301 cut-off events. For 1865/1915 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7120 event pairs, 270 based on Foata normal form. 4/1268 useless extension candidates. Maximal degree in co-relation 3791. Up to 1062 conditions per place. [2024-06-04 14:25:14,887 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 49 selfloop transitions, 15 changer transitions 0/74 dead transitions. [2024-06-04 14:25:14,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 441 flow [2024-06-04 14:25:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:25:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:25:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-04 14:25:14,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-06-04 14:25:14,889 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 211 flow. Second operand 5 states and 142 transitions. [2024-06-04 14:25:14,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 441 flow [2024-06-04 14:25:14,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 412 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:14,898 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 262 flow [2024-06-04 14:25:14,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-04 14:25:14,902 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-04 14:25:14,902 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 262 flow [2024-06-04 14:25:14,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:14,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:14,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:25:14,907 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 14:25:14,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1021213863, now seen corresponding path program 2 times [2024-06-04 14:25:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:14,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258812379] [2024-06-04 14:25:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:15,056 INFO 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 14:25:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258812379] [2024-06-04 14:25:15,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258812379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:15,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:15,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:25:15,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964381873] [2024-06-04 14:25:15,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:15,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:25:15,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:25:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:25:15,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:15,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:15,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:15,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:15,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:15,216 INFO L124 PetriNetUnfolderBase]: 720/1291 cut-off events. [2024-06-04 14:25:15,216 INFO L125 PetriNetUnfolderBase]: For 2770/2841 co-relation queries the response was YES. [2024-06-04 14:25:15,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1291 events. 720/1291 cut-off events. For 2770/2841 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7020 event pairs, 279 based on Foata normal form. 24/1277 useless extension candidates. Maximal degree in co-relation 4044. Up to 1057 conditions per place. [2024-06-04 14:25:15,250 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-04 14:25:15,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 418 flow [2024-06-04 14:25:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:25:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:25:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 14:25:15,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-04 14:25:15,251 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 262 flow. Second operand 5 states and 137 transitions. [2024-06-04 14:25:15,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 418 flow [2024-06-04 14:25:15,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 390 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-04 14:25:15,255 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 272 flow [2024-06-04 14:25:15,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-04 14:25:15,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-04 14:25:15,256 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 272 flow [2024-06-04 14:25:15,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:15,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:15,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:15,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:25:15,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:15,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:15,257 INFO L85 PathProgramCache]: Analyzing trace with hash -652497224, now seen corresponding path program 1 times [2024-06-04 14:25:15,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:15,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817267268] [2024-06-04 14:25:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:15,387 INFO 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 14:25:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817267268] [2024-06-04 14:25:15,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817267268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:15,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:15,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:25:15,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617001570] [2024-06-04 14:25:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:15,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:25:15,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:25:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:25:15,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-04 14:25:15,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:15,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:15,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-04 14:25:15,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:15,516 INFO L124 PetriNetUnfolderBase]: 700/1350 cut-off events. [2024-06-04 14:25:15,517 INFO L125 PetriNetUnfolderBase]: For 2993/2993 co-relation queries the response was YES. [2024-06-04 14:25:15,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4152 conditions, 1350 events. 700/1350 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7586 event pairs, 288 based on Foata normal form. 1/1331 useless extension candidates. Maximal degree in co-relation 4129. Up to 1056 conditions per place. [2024-06-04 14:25:15,525 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 44 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-06-04 14:25:15,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 410 flow [2024-06-04 14:25:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:25:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:25:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-04 14:25:15,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 14:25:15,526 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 272 flow. Second operand 4 states and 110 transitions. [2024-06-04 14:25:15,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 410 flow [2024-06-04 14:25:15,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 368 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:15,531 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 272 flow [2024-06-04 14:25:15,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-04 14:25:15,531 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-04 14:25:15,531 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 272 flow [2024-06-04 14:25:15,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:15,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:15,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:15,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:25:15,532 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 14:25:15,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash 766893258, now seen corresponding path program 1 times [2024-06-04 14:25:15,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:15,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464608569] [2024-06-04 14:25:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:15,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:15,671 INFO 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 14:25:15,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:15,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464608569] [2024-06-04 14:25:15,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464608569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:15,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:15,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:15,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121982431] [2024-06-04 14:25:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:15,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:15,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:15,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:15,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:15,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:15,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:15,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:15,855 INFO L124 PetriNetUnfolderBase]: 725/1295 cut-off events. [2024-06-04 14:25:15,856 INFO L125 PetriNetUnfolderBase]: For 3852/3936 co-relation queries the response was YES. [2024-06-04 14:25:15,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 1295 events. 725/1295 cut-off events. For 3852/3936 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7062 event pairs, 255 based on Foata normal form. 2/1277 useless extension candidates. Maximal degree in co-relation 4351. Up to 1068 conditions per place. [2024-06-04 14:25:15,864 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 62 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-06-04 14:25:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 508 flow [2024-06-04 14:25:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-04 14:25:15,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 14:25:15,865 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 272 flow. Second operand 6 states and 165 transitions. [2024-06-04 14:25:15,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 508 flow [2024-06-04 14:25:15,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 488 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:15,869 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 314 flow [2024-06-04 14:25:15,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-04 14:25:15,870 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-04 14:25:15,870 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 314 flow [2024-06-04 14:25:15,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:15,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:15,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:15,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:25:15,871 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 14:25:15,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash -947691904, now seen corresponding path program 2 times [2024-06-04 14:25:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:15,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065730267] [2024-06-04 14:25:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:15,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:15,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:15,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065730267] [2024-06-04 14:25:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065730267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:15,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:15,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973182178] [2024-06-04 14:25:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:16,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:16,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:16,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:16,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:16,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:16,161 INFO L124 PetriNetUnfolderBase]: 736/1315 cut-off events. [2024-06-04 14:25:16,161 INFO L125 PetriNetUnfolderBase]: For 4957/5053 co-relation queries the response was YES. [2024-06-04 14:25:16,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 1315 events. 736/1315 cut-off events. For 4957/5053 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7195 event pairs, 253 based on Foata normal form. 20/1316 useless extension candidates. Maximal degree in co-relation 4745. Up to 1037 conditions per place. [2024-06-04 14:25:16,169 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 55 selfloop transitions, 25 changer transitions 0/90 dead transitions. [2024-06-04 14:25:16,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 620 flow [2024-06-04 14:25:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-04 14:25:16,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-04 14:25:16,171 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 314 flow. Second operand 6 states and 168 transitions. [2024-06-04 14:25:16,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 620 flow [2024-06-04 14:25:16,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 582 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:16,175 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 396 flow [2024-06-04 14:25:16,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-06-04 14:25:16,176 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-04 14:25:16,176 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 396 flow [2024-06-04 14:25:16,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:16,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:16,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:16,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:25:16,176 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 14:25:16,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1856238190, now seen corresponding path program 3 times [2024-06-04 14:25:16,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:16,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068203007] [2024-06-04 14:25:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:16,346 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 14:25:16,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:16,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068203007] [2024-06-04 14:25:16,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068203007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:16,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:16,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621591010] [2024-06-04 14:25:16,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:16,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:16,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:16,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:16,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:16,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:16,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:16,563 INFO L124 PetriNetUnfolderBase]: 731/1299 cut-off events. [2024-06-04 14:25:16,563 INFO L125 PetriNetUnfolderBase]: For 6498/6614 co-relation queries the response was YES. [2024-06-04 14:25:16,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 1299 events. 731/1299 cut-off events. For 6498/6614 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7098 event pairs, 269 based on Foata normal form. 36/1313 useless extension candidates. Maximal degree in co-relation 4999. Up to 1032 conditions per place. [2024-06-04 14:25:16,570 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 25 changer transitions 0/85 dead transitions. [2024-06-04 14:25:16,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 594 flow [2024-06-04 14:25:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 14:25:16,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-06-04 14:25:16,571 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 396 flow. Second operand 6 states and 163 transitions. [2024-06-04 14:25:16,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 594 flow [2024-06-04 14:25:16,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 544 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:16,580 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 404 flow [2024-06-04 14:25:16,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-04 14:25:16,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-04 14:25:16,581 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 404 flow [2024-06-04 14:25:16,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:16,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:16,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:16,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:25:16,582 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 14:25:16,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 215462156, now seen corresponding path program 1 times [2024-06-04 14:25:16,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:16,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246599498] [2024-06-04 14:25:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:16,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:16,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246599498] [2024-06-04 14:25:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246599498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:16,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:16,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:16,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483576818] [2024-06-04 14:25:16,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:16,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:16,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:16,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:16,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:16,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:16,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:16,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:16,919 INFO L124 PetriNetUnfolderBase]: 780/1450 cut-off events. [2024-06-04 14:25:16,919 INFO L125 PetriNetUnfolderBase]: For 7030/7060 co-relation queries the response was YES. [2024-06-04 14:25:16,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5421 conditions, 1450 events. 780/1450 cut-off events. For 7030/7060 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8024 event pairs, 256 based on Foata normal form. 4/1430 useless extension candidates. Maximal degree in co-relation 5394. Up to 1155 conditions per place. [2024-06-04 14:25:16,927 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 69 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-04 14:25:16,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 659 flow [2024-06-04 14:25:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-04 14:25:16,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-04 14:25:16,928 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 404 flow. Second operand 6 states and 159 transitions. [2024-06-04 14:25:16,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 659 flow [2024-06-04 14:25:16,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 588 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:16,934 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 417 flow [2024-06-04 14:25:16,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=417, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-04 14:25:16,935 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-04 14:25:16,935 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 417 flow [2024-06-04 14:25:16,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:16,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:16,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:25:16,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:16,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 100821467, now seen corresponding path program 1 times [2024-06-04 14:25:16,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:16,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968508882] [2024-06-04 14:25:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:17,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:17,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968508882] [2024-06-04 14:25:17,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968508882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:17,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:17,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:25:17,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248029846] [2024-06-04 14:25:17,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:17,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:25:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:25:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:25:17,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:17,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 417 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:17,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:17,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:17,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:17,218 INFO L124 PetriNetUnfolderBase]: 863/1543 cut-off events. [2024-06-04 14:25:17,219 INFO L125 PetriNetUnfolderBase]: For 9786/9794 co-relation queries the response was YES. [2024-06-04 14:25:17,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6195 conditions, 1543 events. 863/1543 cut-off events. For 9786/9794 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8388 event pairs, 332 based on Foata normal form. 6/1535 useless extension candidates. Maximal degree in co-relation 6166. Up to 1273 conditions per place. [2024-06-04 14:25:17,227 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 66 selfloop transitions, 17 changer transitions 0/96 dead transitions. [2024-06-04 14:25:17,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 695 flow [2024-06-04 14:25:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:25:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:25:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 14:25:17,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-04 14:25:17,228 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 417 flow. Second operand 5 states and 137 transitions. [2024-06-04 14:25:17,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 695 flow [2024-06-04 14:25:17,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 656 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:17,236 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 485 flow [2024-06-04 14:25:17,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-04 14:25:17,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-04 14:25:17,237 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 485 flow [2024-06-04 14:25:17,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:17,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:17,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:25:17,237 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:17,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1046528717, now seen corresponding path program 2 times [2024-06-04 14:25:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:17,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586609453] [2024-06-04 14:25:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:17,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:17,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:17,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586609453] [2024-06-04 14:25:17,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586609453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:17,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:17,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:25:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770780096] [2024-06-04 14:25:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:25:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:25:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:25:17,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:17,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 485 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:17,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:17,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:17,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:17,521 INFO L124 PetriNetUnfolderBase]: 860/1521 cut-off events. [2024-06-04 14:25:17,521 INFO L125 PetriNetUnfolderBase]: For 11231/11235 co-relation queries the response was YES. [2024-06-04 14:25:17,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6421 conditions, 1521 events. 860/1521 cut-off events. For 11231/11235 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8226 event pairs, 338 based on Foata normal form. 5/1507 useless extension candidates. Maximal degree in co-relation 6390. Up to 1270 conditions per place. [2024-06-04 14:25:17,530 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 59 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-04 14:25:17,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 659 flow [2024-06-04 14:25:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:25:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:25:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 14:25:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:25:17,532 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 485 flow. Second operand 5 states and 130 transitions. [2024-06-04 14:25:17,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 659 flow [2024-06-04 14:25:17,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 637 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-04 14:25:17,542 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 503 flow [2024-06-04 14:25:17,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=503, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-04 14:25:17,542 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-04 14:25:17,542 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 503 flow [2024-06-04 14:25:17,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:17,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:17,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:17,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:25:17,543 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 14:25:17,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1276169011, now seen corresponding path program 1 times [2024-06-04 14:25:17,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:17,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954099256] [2024-06-04 14:25:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:17,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:17,667 INFO 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 14:25:17,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954099256] [2024-06-04 14:25:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954099256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:17,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:17,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:25:17,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418133496] [2024-06-04 14:25:17,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:17,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:25:17,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:25:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:25:17,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:17,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 503 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:17,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:17,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:17,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:17,851 INFO L124 PetriNetUnfolderBase]: 838/1535 cut-off events. [2024-06-04 14:25:17,851 INFO L125 PetriNetUnfolderBase]: For 10401/10473 co-relation queries the response was YES. [2024-06-04 14:25:17,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1535 events. 838/1535 cut-off events. For 10401/10473 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8625 event pairs, 265 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 6248. Up to 1242 conditions per place. [2024-06-04 14:25:17,859 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 69 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-04 14:25:17,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 769 flow [2024-06-04 14:25:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:25:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:25:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-04 14:25:17,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-04 14:25:17,860 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 503 flow. Second operand 5 states and 134 transitions. [2024-06-04 14:25:17,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 769 flow [2024-06-04 14:25:17,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 732 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:17,871 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 548 flow [2024-06-04 14:25:17,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=548, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-04 14:25:17,871 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-04 14:25:17,871 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 548 flow [2024-06-04 14:25:17,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:17,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:17,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:25:17,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:17,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1045901401, now seen corresponding path program 2 times [2024-06-04 14:25:17,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:17,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512693898] [2024-06-04 14:25:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:17,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:17,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512693898] [2024-06-04 14:25:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512693898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:17,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:17,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:25:17,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534954365] [2024-06-04 14:25:17,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:25:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:25:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:25:18,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:18,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 548 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:18,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:18,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:18,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:18,186 INFO L124 PetriNetUnfolderBase]: 835/1531 cut-off events. [2024-06-04 14:25:18,186 INFO L125 PetriNetUnfolderBase]: For 11744/11814 co-relation queries the response was YES. [2024-06-04 14:25:18,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6535 conditions, 1531 events. 835/1531 cut-off events. For 11744/11814 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8587 event pairs, 268 based on Foata normal form. 1/1499 useless extension candidates. Maximal degree in co-relation 6500. Up to 1239 conditions per place. [2024-06-04 14:25:18,193 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 65 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-04 14:25:18,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 734 flow [2024-06-04 14:25:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:25:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:25:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 14:25:18,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:25:18,205 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 548 flow. Second operand 5 states and 130 transitions. [2024-06-04 14:25:18,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 734 flow [2024-06-04 14:25:18,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 704 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-04 14:25:18,215 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 559 flow [2024-06-04 14:25:18,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-04 14:25:18,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-04 14:25:18,218 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 559 flow [2024-06-04 14:25:18,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:18,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:18,218 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 14:25:18,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:25:18,218 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 14:25:18,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1750058421, now seen corresponding path program 1 times [2024-06-04 14:25:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:18,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748357106] [2024-06-04 14:25:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:18,378 INFO 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 14:25:18,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:18,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748357106] [2024-06-04 14:25:18,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748357106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:18,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:18,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:18,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091065179] [2024-06-04 14:25:18,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:18,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:18,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:18,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:18,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:18,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:18,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 559 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:18,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:18,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:18,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:18,648 INFO L124 PetriNetUnfolderBase]: 980/1736 cut-off events. [2024-06-04 14:25:18,649 INFO L125 PetriNetUnfolderBase]: For 18086/18261 co-relation queries the response was YES. [2024-06-04 14:25:18,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7963 conditions, 1736 events. 980/1736 cut-off events. For 18086/18261 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9834 event pairs, 239 based on Foata normal form. 24/1723 useless extension candidates. Maximal degree in co-relation 7926. Up to 1231 conditions per place. [2024-06-04 14:25:18,658 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 100 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-04 14:25:18,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 130 transitions, 1005 flow [2024-06-04 14:25:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:25:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:25:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-04 14:25:18,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6221590909090909 [2024-06-04 14:25:18,660 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 559 flow. Second operand 8 states and 219 transitions. [2024-06-04 14:25:18,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 130 transitions, 1005 flow [2024-06-04 14:25:18,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 959 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:18,715 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 591 flow [2024-06-04 14:25:18,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=591, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-06-04 14:25:18,716 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-04 14:25:18,716 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 591 flow [2024-06-04 14:25:18,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:18,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:18,717 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 14:25:18,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:25:18,717 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:18,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1860168185, now seen corresponding path program 2 times [2024-06-04 14:25:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:18,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380764761] [2024-06-04 14:25:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:18,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:18,880 INFO 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 14:25:18,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:18,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380764761] [2024-06-04 14:25:18,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380764761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:18,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:18,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108911664] [2024-06-04 14:25:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:18,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:18,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:18,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 591 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:18,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:18,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:18,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:19,126 INFO L124 PetriNetUnfolderBase]: 952/1700 cut-off events. [2024-06-04 14:25:19,126 INFO L125 PetriNetUnfolderBase]: For 18978/19135 co-relation queries the response was YES. [2024-06-04 14:25:19,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 1700 events. 952/1700 cut-off events. For 18978/19135 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9607 event pairs, 296 based on Foata normal form. 28/1689 useless extension candidates. Maximal degree in co-relation 7730. Up to 1322 conditions per place. [2024-06-04 14:25:19,136 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 94 selfloop transitions, 14 changer transitions 0/121 dead transitions. [2024-06-04 14:25:19,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 905 flow [2024-06-04 14:25:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-04 14:25:19,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201298701298701 [2024-06-04 14:25:19,138 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 591 flow. Second operand 7 states and 191 transitions. [2024-06-04 14:25:19,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 905 flow [2024-06-04 14:25:19,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 121 transitions, 877 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:19,154 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 598 flow [2024-06-04 14:25:19,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2024-06-04 14:25:19,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-04 14:25:19,154 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 598 flow [2024-06-04 14:25:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:19,155 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 14:25:19,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:25:19,155 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 14:25:19,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1579237881, now seen corresponding path program 3 times [2024-06-04 14:25:19,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379149966] [2024-06-04 14:25:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:19,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:19,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:19,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379149966] [2024-06-04 14:25:19,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379149966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:19,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:19,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:19,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183848989] [2024-06-04 14:25:19,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:19,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:19,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:19,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:19,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:19,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 598 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:19,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:19,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:19,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:19,511 INFO L124 PetriNetUnfolderBase]: 1010/1797 cut-off events. [2024-06-04 14:25:19,511 INFO L125 PetriNetUnfolderBase]: For 21577/21734 co-relation queries the response was YES. [2024-06-04 14:25:19,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8294 conditions, 1797 events. 1010/1797 cut-off events. For 21577/21734 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10441 event pairs, 319 based on Foata normal form. 44/1793 useless extension candidates. Maximal degree in co-relation 8255. Up to 1370 conditions per place. [2024-06-04 14:25:19,522 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 78 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-04 14:25:19,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 920 flow [2024-06-04 14:25:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-04 14:25:19,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-06-04 14:25:19,524 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 598 flow. Second operand 7 states and 192 transitions. [2024-06-04 14:25:19,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 920 flow [2024-06-04 14:25:19,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 887 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 14:25:19,542 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 650 flow [2024-06-04 14:25:19,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=650, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-06-04 14:25:19,542 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-04 14:25:19,543 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 650 flow [2024-06-04 14:25:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:19,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:19,543 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 14:25:19,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:25:19,543 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 14:25:19,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash 206047913, now seen corresponding path program 1 times [2024-06-04 14:25:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:19,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544775760] [2024-06-04 14:25:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:19,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:19,673 INFO 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 14:25:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544775760] [2024-06-04 14:25:19,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544775760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:19,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:19,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:19,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708288076] [2024-06-04 14:25:19,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:19,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:19,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 650 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:19,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:19,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:19,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:19,924 INFO L124 PetriNetUnfolderBase]: 1180/2033 cut-off events. [2024-06-04 14:25:19,925 INFO L125 PetriNetUnfolderBase]: For 24295/24295 co-relation queries the response was YES. [2024-06-04 14:25:19,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 2033 events. 1180/2033 cut-off events. For 24295/24295 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11452 event pairs, 353 based on Foata normal form. 4/2029 useless extension candidates. Maximal degree in co-relation 9363. Up to 1727 conditions per place. [2024-06-04 14:25:19,939 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-04 14:25:19,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 995 flow [2024-06-04 14:25:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 14:25:19,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2024-06-04 14:25:19,940 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 650 flow. Second operand 7 states and 184 transitions. [2024-06-04 14:25:19,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 995 flow [2024-06-04 14:25:19,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 122 transitions, 930 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:19,964 INFO L231 Difference]: Finished difference. Result has 95 places, 94 transitions, 693 flow [2024-06-04 14:25:19,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=693, PETRI_PLACES=95, PETRI_TRANSITIONS=94} [2024-06-04 14:25:19,965 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-04 14:25:19,965 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 94 transitions, 693 flow [2024-06-04 14:25:19,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:19,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:19,965 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 14:25:19,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:25:19,966 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:19,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1433486413, now seen corresponding path program 4 times [2024-06-04 14:25:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585861888] [2024-06-04 14:25:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:20,095 INFO 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 14:25:20,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:20,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585861888] [2024-06-04 14:25:20,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585861888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:20,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:20,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824880508] [2024-06-04 14:25:20,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:20,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:20,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:20,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:20,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 94 transitions, 693 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:20,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:20,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:20,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:20,386 INFO L124 PetriNetUnfolderBase]: 1045/1873 cut-off events. [2024-06-04 14:25:20,386 INFO L125 PetriNetUnfolderBase]: For 25494/25652 co-relation queries the response was YES. [2024-06-04 14:25:20,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8853 conditions, 1873 events. 1045/1873 cut-off events. For 25494/25652 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10908 event pairs, 321 based on Foata normal form. 46/1864 useless extension candidates. Maximal degree in co-relation 8811. Up to 1428 conditions per place. [2024-06-04 14:25:20,395 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 79 selfloop transitions, 29 changer transitions 0/122 dead transitions. [2024-06-04 14:25:20,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 1015 flow [2024-06-04 14:25:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-04 14:25:20,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-04 14:25:20,397 INFO L175 Difference]: Start difference. First operand has 95 places, 94 transitions, 693 flow. Second operand 7 states and 189 transitions. [2024-06-04 14:25:20,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 1015 flow [2024-06-04 14:25:20,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 122 transitions, 952 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:20,413 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 721 flow [2024-06-04 14:25:20,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=721, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2024-06-04 14:25:20,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2024-06-04 14:25:20,413 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 721 flow [2024-06-04 14:25:20,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:20,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:20,414 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 14:25:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:25:20,414 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 14:25:20,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1243554795, now seen corresponding path program 2 times [2024-06-04 14:25:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:20,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629774095] [2024-06-04 14:25:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:20,530 INFO 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 14:25:20,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629774095] [2024-06-04 14:25:20,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629774095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:20,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:20,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:20,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301755192] [2024-06-04 14:25:20,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:20,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:20,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:20,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:20,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:20,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:20,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:20,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:20,765 INFO L124 PetriNetUnfolderBase]: 1233/2138 cut-off events. [2024-06-04 14:25:20,765 INFO L125 PetriNetUnfolderBase]: For 28445/28445 co-relation queries the response was YES. [2024-06-04 14:25:20,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10121 conditions, 2138 events. 1233/2138 cut-off events. For 28445/28445 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12128 event pairs, 365 based on Foata normal form. 4/2137 useless extension candidates. Maximal degree in co-relation 10078. Up to 1813 conditions per place. [2024-06-04 14:25:20,778 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-04 14:25:20,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 125 transitions, 1076 flow [2024-06-04 14:25:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:25:20,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-04 14:25:20,779 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 721 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:25:20,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 125 transitions, 1076 flow [2024-06-04 14:25:20,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 125 transitions, 1003 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:20,805 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 780 flow [2024-06-04 14:25:20,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=780, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-06-04 14:25:20,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-04 14:25:20,806 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 780 flow [2024-06-04 14:25:20,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:20,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:20,806 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 14:25:20,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:25:20,807 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 14:25:20,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash 890235883, now seen corresponding path program 3 times [2024-06-04 14:25:20,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:20,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678110329] [2024-06-04 14:25:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:20,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:20,927 INFO 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 14:25:20,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678110329] [2024-06-04 14:25:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678110329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:20,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:20,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268073707] [2024-06-04 14:25:20,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:20,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:20,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:20,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:20,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:20,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:20,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:20,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:21,180 INFO L124 PetriNetUnfolderBase]: 1250/2170 cut-off events. [2024-06-04 14:25:21,181 INFO L125 PetriNetUnfolderBase]: For 30692/30692 co-relation queries the response was YES. [2024-06-04 14:25:21,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10464 conditions, 2170 events. 1250/2170 cut-off events. For 30692/30692 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12405 event pairs, 370 based on Foata normal form. 4/2169 useless extension candidates. Maximal degree in co-relation 10419. Up to 1840 conditions per place. [2024-06-04 14:25:21,196 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 92 selfloop transitions, 28 changer transitions 0/129 dead transitions. [2024-06-04 14:25:21,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 129 transitions, 1135 flow [2024-06-04 14:25:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 14:25:21,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-04 14:25:21,198 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 780 flow. Second operand 7 states and 180 transitions. [2024-06-04 14:25:21,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 129 transitions, 1135 flow [2024-06-04 14:25:21,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 129 transitions, 1054 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:21,231 INFO L231 Difference]: Finished difference. Result has 104 places, 105 transitions, 821 flow [2024-06-04 14:25:21,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=821, PETRI_PLACES=104, PETRI_TRANSITIONS=105} [2024-06-04 14:25:21,231 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-04 14:25:21,231 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 105 transitions, 821 flow [2024-06-04 14:25:21,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:21,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:21,232 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 14:25:21,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:25:21,232 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 14:25:21,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 900711403, now seen corresponding path program 4 times [2024-06-04 14:25:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:21,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554652064] [2024-06-04 14:25:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:21,358 INFO 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 14:25:21,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554652064] [2024-06-04 14:25:21,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554652064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:21,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:21,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842108358] [2024-06-04 14:25:21,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:21,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:21,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:21,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:21,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 821 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:21,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:21,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:21,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:21,692 INFO L124 PetriNetUnfolderBase]: 1242/2163 cut-off events. [2024-06-04 14:25:21,692 INFO L125 PetriNetUnfolderBase]: For 32330/32330 co-relation queries the response was YES. [2024-06-04 14:25:21,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10484 conditions, 2163 events. 1242/2163 cut-off events. For 32330/32330 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12388 event pairs, 318 based on Foata normal form. 4/2162 useless extension candidates. Maximal degree in co-relation 10438. Up to 1751 conditions per place. [2024-06-04 14:25:21,709 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 88 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-04 14:25:21,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 132 transitions, 1169 flow [2024-06-04 14:25:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:25:21,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-04 14:25:21,710 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 821 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:25:21,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 132 transitions, 1169 flow [2024-06-04 14:25:21,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 1098 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:21,756 INFO L231 Difference]: Finished difference. Result has 108 places, 107 transitions, 871 flow [2024-06-04 14:25:21,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=871, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2024-06-04 14:25:21,756 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-04 14:25:21,757 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 871 flow [2024-06-04 14:25:21,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:21,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:21,757 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 14:25:21,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:25:21,757 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:21,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash -447776562, now seen corresponding path program 1 times [2024-06-04 14:25:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:21,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595777535] [2024-06-04 14:25:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:21,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:21,907 INFO 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 14:25:21,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:21,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595777535] [2024-06-04 14:25:21,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595777535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:21,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:21,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:21,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755434700] [2024-06-04 14:25:21,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:21,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:21,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:21,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:21,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:21,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:21,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 871 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:21,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:21,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:21,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:22,116 INFO L124 PetriNetUnfolderBase]: 1255/2185 cut-off events. [2024-06-04 14:25:22,117 INFO L125 PetriNetUnfolderBase]: For 34716/34716 co-relation queries the response was YES. [2024-06-04 14:25:22,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10781 conditions, 2185 events. 1255/2185 cut-off events. For 34716/34716 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12544 event pairs, 367 based on Foata normal form. 1/2180 useless extension candidates. Maximal degree in co-relation 10734. Up to 1868 conditions per place. [2024-06-04 14:25:22,130 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 106 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-04 14:25:22,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 146 transitions, 1407 flow [2024-06-04 14:25:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:25:22,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-04 14:25:22,132 INFO L175 Difference]: Start difference. First operand has 108 places, 107 transitions, 871 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:25:22,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 146 transitions, 1407 flow [2024-06-04 14:25:22,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 146 transitions, 1304 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:22,170 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1003 flow [2024-06-04 14:25:22,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1003, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-04 14:25:22,171 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-04 14:25:22,171 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1003 flow [2024-06-04 14:25:22,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:22,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:22,171 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 14:25:22,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:25:22,171 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 14:25:22,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2009764566, now seen corresponding path program 2 times [2024-06-04 14:25:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:22,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571679106] [2024-06-04 14:25:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:22,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:22,277 INFO 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 14:25:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:22,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571679106] [2024-06-04 14:25:22,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571679106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:22,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:22,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798183137] [2024-06-04 14:25:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:22,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:22,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:22,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1003 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:22,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:22,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:22,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:22,499 INFO L124 PetriNetUnfolderBase]: 1268/2207 cut-off events. [2024-06-04 14:25:22,499 INFO L125 PetriNetUnfolderBase]: For 37651/37651 co-relation queries the response was YES. [2024-06-04 14:25:22,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11191 conditions, 2207 events. 1268/2207 cut-off events. For 37651/37651 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12649 event pairs, 367 based on Foata normal form. 1/2202 useless extension candidates. Maximal degree in co-relation 11141. Up to 1883 conditions per place. [2024-06-04 14:25:22,516 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 103 selfloop transitions, 37 changer transitions 0/149 dead transitions. [2024-06-04 14:25:22,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1486 flow [2024-06-04 14:25:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 14:25:22,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-04 14:25:22,517 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1003 flow. Second operand 6 states and 157 transitions. [2024-06-04 14:25:22,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1486 flow [2024-06-04 14:25:22,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 149 transitions, 1446 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-04 14:25:22,568 INFO L231 Difference]: Finished difference. Result has 117 places, 131 transitions, 1106 flow [2024-06-04 14:25:22,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1106, PETRI_PLACES=117, PETRI_TRANSITIONS=131} [2024-06-04 14:25:22,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-04 14:25:22,568 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 131 transitions, 1106 flow [2024-06-04 14:25:22,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:22,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:22,569 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 14:25:22,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:25:22,569 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 14:25:22,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1894771334, now seen corresponding path program 1 times [2024-06-04 14:25:22,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:22,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646525386] [2024-06-04 14:25:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:22,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:22,673 INFO 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 14:25:22,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:22,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646525386] [2024-06-04 14:25:22,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646525386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:22,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:22,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:22,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222666424] [2024-06-04 14:25:22,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:22,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:22,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:22,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 131 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:22,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:22,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:22,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:22,940 INFO L124 PetriNetUnfolderBase]: 1214/2164 cut-off events. [2024-06-04 14:25:22,940 INFO L125 PetriNetUnfolderBase]: For 41062/41062 co-relation queries the response was YES. [2024-06-04 14:25:22,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11042 conditions, 2164 events. 1214/2164 cut-off events. For 41062/41062 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12729 event pairs, 356 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 10989. Up to 1754 conditions per place. [2024-06-04 14:25:22,954 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 27 changer transitions 0/154 dead transitions. [2024-06-04 14:25:22,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1512 flow [2024-06-04 14:25:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:25:22,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-04 14:25:22,955 INFO L175 Difference]: Start difference. First operand has 117 places, 131 transitions, 1106 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:25:22,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1512 flow [2024-06-04 14:25:22,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 154 transitions, 1457 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:22,990 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1174 flow [2024-06-04 14:25:22,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1174, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-04 14:25:22,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-04 14:25:22,990 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1174 flow [2024-06-04 14:25:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:22,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:22,991 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 14:25:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:25:22,991 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:22,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1715695578, now seen corresponding path program 3 times [2024-06-04 14:25:22,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718739276] [2024-06-04 14:25:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:23,093 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 14:25:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718739276] [2024-06-04 14:25:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718739276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491149031] [2024-06-04 14:25:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:23,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:23,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1174 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:23,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:23,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:23,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:23,320 INFO L124 PetriNetUnfolderBase]: 1275/2219 cut-off events. [2024-06-04 14:25:23,320 INFO L125 PetriNetUnfolderBase]: For 43067/43067 co-relation queries the response was YES. [2024-06-04 14:25:23,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11593 conditions, 2219 events. 1275/2219 cut-off events. For 43067/43067 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12763 event pairs, 369 based on Foata normal form. 1/2213 useless extension candidates. Maximal degree in co-relation 11539. Up to 1894 conditions per place. [2024-06-04 14:25:23,338 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-04 14:25:23,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 157 transitions, 1648 flow [2024-06-04 14:25:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 14:25:23,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-04 14:25:23,339 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1174 flow. Second operand 6 states and 157 transitions. [2024-06-04 14:25:23,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 157 transitions, 1648 flow [2024-06-04 14:25:23,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 157 transitions, 1593 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:23,381 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1233 flow [2024-06-04 14:25:23,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1233, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-04 14:25:23,382 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-04 14:25:23,382 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1233 flow [2024-06-04 14:25:23,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:23,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:23,382 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 14:25:23,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:25:23,382 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:23,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:23,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1962257900, now seen corresponding path program 4 times [2024-06-04 14:25:23,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:23,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36229679] [2024-06-04 14:25:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:23,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:23,509 INFO 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 14:25:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36229679] [2024-06-04 14:25:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36229679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:23,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229075020] [2024-06-04 14:25:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:23,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:23,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:23,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1233 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:23,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:23,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:23,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:23,778 INFO L124 PetriNetUnfolderBase]: 1280/2228 cut-off events. [2024-06-04 14:25:23,779 INFO L125 PetriNetUnfolderBase]: For 45927/45927 co-relation queries the response was YES. [2024-06-04 14:25:23,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11802 conditions, 2228 events. 1280/2228 cut-off events. For 45927/45927 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12848 event pairs, 369 based on Foata normal form. 1/2222 useless extension candidates. Maximal degree in co-relation 11746. Up to 1900 conditions per place. [2024-06-04 14:25:23,798 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 105 selfloop transitions, 43 changer transitions 0/157 dead transitions. [2024-06-04 14:25:23,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 157 transitions, 1664 flow [2024-06-04 14:25:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:25:23,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:25:23,801 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1233 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:25:23,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 157 transitions, 1664 flow [2024-06-04 14:25:23,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1612 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-04 14:25:23,858 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1320 flow [2024-06-04 14:25:23,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1320, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-04 14:25:23,863 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-04 14:25:23,863 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1320 flow [2024-06-04 14:25:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:23,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:23,863 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 14:25:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:25:23,864 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 14:25:23,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 88929912, now seen corresponding path program 5 times [2024-06-04 14:25:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327567755] [2024-06-04 14:25:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:23,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:23,990 INFO 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 14:25:23,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:23,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327567755] [2024-06-04 14:25:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327567755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:23,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:23,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:23,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909253781] [2024-06-04 14:25:23,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:23,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:24,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:24,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1320 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:24,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:24,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:24,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:24,227 INFO L124 PetriNetUnfolderBase]: 1277/2219 cut-off events. [2024-06-04 14:25:24,228 INFO L125 PetriNetUnfolderBase]: For 48802/48802 co-relation queries the response was YES. [2024-06-04 14:25:24,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11860 conditions, 2219 events. 1277/2219 cut-off events. For 48802/48802 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12819 event pairs, 378 based on Foata normal form. 1/2211 useless extension candidates. Maximal degree in co-relation 11802. Up to 1897 conditions per place. [2024-06-04 14:25:24,244 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 43 changer transitions 0/154 dead transitions. [2024-06-04 14:25:24,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 154 transitions, 1692 flow [2024-06-04 14:25:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 14:25:24,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:25:24,246 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1320 flow. Second operand 6 states and 150 transitions. [2024-06-04 14:25:24,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 154 transitions, 1692 flow [2024-06-04 14:25:24,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 154 transitions, 1626 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:24,295 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1346 flow [2024-06-04 14:25:24,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1346, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2024-06-04 14:25:24,296 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-04 14:25:24,296 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1346 flow [2024-06-04 14:25:24,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:24,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:24,297 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 14:25:24,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:25:24,297 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 14:25:24,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1937375958, now seen corresponding path program 6 times [2024-06-04 14:25:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:24,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121891179] [2024-06-04 14:25:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:24,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:24,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121891179] [2024-06-04 14:25:24,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121891179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:24,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:24,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:24,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523526372] [2024-06-04 14:25:24,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:24,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:24,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:24,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:24,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1346 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:24,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:24,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:24,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:24,642 INFO L124 PetriNetUnfolderBase]: 1274/2215 cut-off events. [2024-06-04 14:25:24,642 INFO L125 PetriNetUnfolderBase]: For 51296/51296 co-relation queries the response was YES. [2024-06-04 14:25:24,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11916 conditions, 2215 events. 1274/2215 cut-off events. For 51296/51296 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12770 event pairs, 378 based on Foata normal form. 1/2207 useless extension candidates. Maximal degree in co-relation 11857. Up to 1894 conditions per place. [2024-06-04 14:25:24,657 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 101 selfloop transitions, 43 changer transitions 0/153 dead transitions. [2024-06-04 14:25:24,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 153 transitions, 1658 flow [2024-06-04 14:25:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:25:24,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-04 14:25:24,659 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1346 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:25:24,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 153 transitions, 1658 flow [2024-06-04 14:25:24,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 153 transitions, 1566 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:24,725 INFO L231 Difference]: Finished difference. Result has 136 places, 143 transitions, 1346 flow [2024-06-04 14:25:24,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1346, PETRI_PLACES=136, PETRI_TRANSITIONS=143} [2024-06-04 14:25:24,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-04 14:25:24,726 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 143 transitions, 1346 flow [2024-06-04 14:25:24,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:24,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:24,726 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 14:25:24,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:25:24,726 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 14:25:24,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1937384886, now seen corresponding path program 2 times [2024-06-04 14:25:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669023407] [2024-06-04 14:25:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:24,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:24,831 INFO 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 14:25:24,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:24,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669023407] [2024-06-04 14:25:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669023407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:24,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:24,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810969322] [2024-06-04 14:25:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:24,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:24,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:24,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 143 transitions, 1346 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:24,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:24,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:24,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:25,071 INFO L124 PetriNetUnfolderBase]: 1215/2157 cut-off events. [2024-06-04 14:25:25,071 INFO L125 PetriNetUnfolderBase]: For 55103/55103 co-relation queries the response was YES. [2024-06-04 14:25:25,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11709 conditions, 2157 events. 1215/2157 cut-off events. For 55103/55103 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12760 event pairs, 361 based on Foata normal form. 2/2141 useless extension candidates. Maximal degree in co-relation 11650. Up to 1756 conditions per place. [2024-06-04 14:25:25,088 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 99 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-04 14:25:25,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 157 transitions, 1722 flow [2024-06-04 14:25:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:25:25,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:25:25,090 INFO L175 Difference]: Start difference. First operand has 136 places, 143 transitions, 1346 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:25:25,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 157 transitions, 1722 flow [2024-06-04 14:25:25,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 157 transitions, 1640 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:25,148 INFO L231 Difference]: Finished difference. Result has 138 places, 146 transitions, 1363 flow [2024-06-04 14:25:25,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1363, PETRI_PLACES=138, PETRI_TRANSITIONS=146} [2024-06-04 14:25:25,149 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-04 14:25:25,149 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 146 transitions, 1363 flow [2024-06-04 14:25:25,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:25,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:25,149 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 14:25:25,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:25:25,149 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 14:25:25,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1952622006, now seen corresponding path program 3 times [2024-06-04 14:25:25,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:25,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170058282] [2024-06-04 14:25:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:25,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:25,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:25,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170058282] [2024-06-04 14:25:25,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170058282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:25,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:25,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:25,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548854091] [2024-06-04 14:25:25,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:25,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:25,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:25,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 146 transitions, 1363 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:25,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:25,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:25,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:25,568 INFO L124 PetriNetUnfolderBase]: 1209/2168 cut-off events. [2024-06-04 14:25:25,568 INFO L125 PetriNetUnfolderBase]: For 57157/57157 co-relation queries the response was YES. [2024-06-04 14:25:25,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11728 conditions, 2168 events. 1209/2168 cut-off events. For 57157/57157 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12821 event pairs, 353 based on Foata normal form. 2/2159 useless extension candidates. Maximal degree in co-relation 11668. Up to 1786 conditions per place. [2024-06-04 14:25:25,582 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 115 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-06-04 14:25:25,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 156 transitions, 1643 flow [2024-06-04 14:25:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:25:25,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-04 14:25:25,583 INFO L175 Difference]: Start difference. First operand has 138 places, 146 transitions, 1363 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:25:25,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 156 transitions, 1643 flow [2024-06-04 14:25:25,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 156 transitions, 1545 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:25,657 INFO L231 Difference]: Finished difference. Result has 140 places, 146 transitions, 1297 flow [2024-06-04 14:25:25,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1297, PETRI_PLACES=140, PETRI_TRANSITIONS=146} [2024-06-04 14:25:25,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-04 14:25:25,657 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 146 transitions, 1297 flow [2024-06-04 14:25:25,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:25,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:25,658 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 14:25:25,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:25:25,658 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 14:25:25,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:25,658 INFO L85 PathProgramCache]: Analyzing trace with hash -171999818, now seen corresponding path program 1 times [2024-06-04 14:25:25,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:25,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275524382] [2024-06-04 14:25:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:25,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:25,806 INFO 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 14:25:25,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:25,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275524382] [2024-06-04 14:25:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275524382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:25,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:25,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785799365] [2024-06-04 14:25:25,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:25,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:25,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:25,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 146 transitions, 1297 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:25,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:25,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:25,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:26,101 INFO L124 PetriNetUnfolderBase]: 1214/2187 cut-off events. [2024-06-04 14:25:26,102 INFO L125 PetriNetUnfolderBase]: For 49204/49308 co-relation queries the response was YES. [2024-06-04 14:25:26,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2187 events. 1214/2187 cut-off events. For 49204/49308 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13004 event pairs, 312 based on Foata normal form. 1/2147 useless extension candidates. Maximal degree in co-relation 11263. Up to 1825 conditions per place. [2024-06-04 14:25:26,117 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 129 selfloop transitions, 13 changer transitions 0/165 dead transitions. [2024-06-04 14:25:26,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 165 transitions, 1651 flow [2024-06-04 14:25:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 14:25:26,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871212121212122 [2024-06-04 14:25:26,119 INFO L175 Difference]: Start difference. First operand has 140 places, 146 transitions, 1297 flow. Second operand 6 states and 155 transitions. [2024-06-04 14:25:26,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 165 transitions, 1651 flow [2024-06-04 14:25:26,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 165 transitions, 1590 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:25:26,174 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1304 flow [2024-06-04 14:25:26,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1304, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-06-04 14:25:26,175 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-04 14:25:26,175 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1304 flow [2024-06-04 14:25:26,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:26,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:26,175 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 14:25:26,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:25:26,175 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 14:25:26,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -167238218, now seen corresponding path program 2 times [2024-06-04 14:25:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:26,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263653089] [2024-06-04 14:25:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:26,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:26,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263653089] [2024-06-04 14:25:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263653089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648209631] [2024-06-04 14:25:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:26,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:26,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:26,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1304 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:26,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:26,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:26,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:26,592 INFO L124 PetriNetUnfolderBase]: 1229/2210 cut-off events. [2024-06-04 14:25:26,593 INFO L125 PetriNetUnfolderBase]: For 52327/52479 co-relation queries the response was YES. [2024-06-04 14:25:26,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11750 conditions, 2210 events. 1229/2210 cut-off events. For 52327/52479 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13140 event pairs, 313 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 11690. Up to 1821 conditions per place. [2024-06-04 14:25:26,606 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 116 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-04 14:25:26,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 169 transitions, 1768 flow [2024-06-04 14:25:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 14:25:26,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-04 14:25:26,607 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1304 flow. Second operand 6 states and 157 transitions. [2024-06-04 14:25:26,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 169 transitions, 1768 flow [2024-06-04 14:25:26,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 1722 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:26,660 INFO L231 Difference]: Finished difference. Result has 141 places, 155 transitions, 1403 flow [2024-06-04 14:25:26,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1403, PETRI_PLACES=141, PETRI_TRANSITIONS=155} [2024-06-04 14:25:26,661 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-04 14:25:26,661 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 155 transitions, 1403 flow [2024-06-04 14:25:26,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:26,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:26,661 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 14:25:26,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:25:26,662 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 14:25:26,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:26,662 INFO L85 PathProgramCache]: Analyzing trace with hash 892402110, now seen corresponding path program 3 times [2024-06-04 14:25:26,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:26,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368180095] [2024-06-04 14:25:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:26,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:26,792 INFO 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 14:25:26,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:26,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368180095] [2024-06-04 14:25:26,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368180095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:26,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:26,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:26,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419313591] [2024-06-04 14:25:26,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:26,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:26,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:26,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:26,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 155 transitions, 1403 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:26,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:26,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:26,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:27,041 INFO L124 PetriNetUnfolderBase]: 1221/2195 cut-off events. [2024-06-04 14:25:27,041 INFO L125 PetriNetUnfolderBase]: For 55474/55634 co-relation queries the response was YES. [2024-06-04 14:25:27,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11914 conditions, 2195 events. 1221/2195 cut-off events. For 55474/55634 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13033 event pairs, 320 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 11853. Up to 1811 conditions per place. [2024-06-04 14:25:27,056 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 112 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-04 14:25:27,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 165 transitions, 1711 flow [2024-06-04 14:25:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:25:27,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:25:27,057 INFO L175 Difference]: Start difference. First operand has 141 places, 155 transitions, 1403 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:25:27,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 165 transitions, 1711 flow [2024-06-04 14:25:27,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 165 transitions, 1645 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:27,119 INFO L231 Difference]: Finished difference. Result has 145 places, 155 transitions, 1404 flow [2024-06-04 14:25:27,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1404, PETRI_PLACES=145, PETRI_TRANSITIONS=155} [2024-06-04 14:25:27,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-04 14:25:27,120 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 155 transitions, 1404 flow [2024-06-04 14:25:27,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:27,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:27,120 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 14:25:27,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:25:27,120 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 14:25:27,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639862, now seen corresponding path program 1 times [2024-06-04 14:25:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:27,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695574119] [2024-06-04 14:25:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:27,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:27,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695574119] [2024-06-04 14:25:27,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695574119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:27,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:27,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:25:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224205436] [2024-06-04 14:25:27,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:27,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:25:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:25:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:25:27,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:27,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 155 transitions, 1404 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:27,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:27,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:27,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:27,523 INFO L124 PetriNetUnfolderBase]: 1218/2189 cut-off events. [2024-06-04 14:25:27,523 INFO L125 PetriNetUnfolderBase]: For 68398/68398 co-relation queries the response was YES. [2024-06-04 14:25:27,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12405 conditions, 2189 events. 1218/2189 cut-off events. For 68398/68398 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12976 event pairs, 350 based on Foata normal form. 2/2180 useless extension candidates. Maximal degree in co-relation 12342. Up to 1796 conditions per place. [2024-06-04 14:25:27,536 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 128 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2024-06-04 14:25:27,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 168 transitions, 1740 flow [2024-06-04 14:25:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:25:27,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-04 14:25:27,538 INFO L175 Difference]: Start difference. First operand has 145 places, 155 transitions, 1404 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:25:27,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 168 transitions, 1740 flow [2024-06-04 14:25:27,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 168 transitions, 1659 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:27,608 INFO L231 Difference]: Finished difference. Result has 146 places, 157 transitions, 1386 flow [2024-06-04 14:25:27,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1386, PETRI_PLACES=146, PETRI_TRANSITIONS=157} [2024-06-04 14:25:27,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-04 14:25:27,609 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 157 transitions, 1386 flow [2024-06-04 14:25:27,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:27,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:27,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:27,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:25:27,610 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:27,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:27,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1672104650, now seen corresponding path program 1 times [2024-06-04 14:25:27,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:27,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511439552] [2024-06-04 14:25:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:27,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:27,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:27,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511439552] [2024-06-04 14:25:27,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511439552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:27,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:27,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:27,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502232966] [2024-06-04 14:25:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:27,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:27,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:27,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:27,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 157 transitions, 1386 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:27,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:27,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:27,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:28,121 INFO L124 PetriNetUnfolderBase]: 1410/2485 cut-off events. [2024-06-04 14:25:28,122 INFO L125 PetriNetUnfolderBase]: For 76634/76634 co-relation queries the response was YES. [2024-06-04 14:25:28,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13790 conditions, 2485 events. 1410/2485 cut-off events. For 76634/76634 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14811 event pairs, 349 based on Foata normal form. 12/2487 useless extension candidates. Maximal degree in co-relation 13726. Up to 1768 conditions per place. [2024-06-04 14:25:28,139 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 153 selfloop transitions, 41 changer transitions 0/203 dead transitions. [2024-06-04 14:25:28,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 203 transitions, 1998 flow [2024-06-04 14:25:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:25:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:25:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-04 14:25:28,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079545454545454 [2024-06-04 14:25:28,140 INFO L175 Difference]: Start difference. First operand has 146 places, 157 transitions, 1386 flow. Second operand 8 states and 214 transitions. [2024-06-04 14:25:28,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 203 transitions, 1998 flow [2024-06-04 14:25:28,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 203 transitions, 1951 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:28,245 INFO L231 Difference]: Finished difference. Result has 152 places, 165 transitions, 1547 flow [2024-06-04 14:25:28,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1547, PETRI_PLACES=152, PETRI_TRANSITIONS=165} [2024-06-04 14:25:28,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-04 14:25:28,246 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 165 transitions, 1547 flow [2024-06-04 14:25:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:28,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:28,246 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 14:25:28,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:25:28,246 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:28,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1561069622, now seen corresponding path program 2 times [2024-06-04 14:25:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:28,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129958479] [2024-06-04 14:25:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:28,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:28,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129958479] [2024-06-04 14:25:28,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129958479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:28,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:28,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:28,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261156946] [2024-06-04 14:25:28,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:28,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:28,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:28,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 165 transitions, 1547 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:28,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:28,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:28,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:28,779 INFO L124 PetriNetUnfolderBase]: 1520/2699 cut-off events. [2024-06-04 14:25:28,780 INFO L125 PetriNetUnfolderBase]: For 83323/83323 co-relation queries the response was YES. [2024-06-04 14:25:28,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15171 conditions, 2699 events. 1520/2699 cut-off events. For 83323/83323 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16570 event pairs, 389 based on Foata normal form. 12/2703 useless extension candidates. Maximal degree in co-relation 15104. Up to 2041 conditions per place. [2024-06-04 14:25:28,800 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 153 selfloop transitions, 43 changer transitions 0/205 dead transitions. [2024-06-04 14:25:28,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 205 transitions, 2136 flow [2024-06-04 14:25:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:25:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:25:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 14:25:28,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-04 14:25:28,804 INFO L175 Difference]: Start difference. First operand has 152 places, 165 transitions, 1547 flow. Second operand 8 states and 212 transitions. [2024-06-04 14:25:28,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 205 transitions, 2136 flow [2024-06-04 14:25:28,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 205 transitions, 2050 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:28,940 INFO L231 Difference]: Finished difference. Result has 159 places, 171 transitions, 1658 flow [2024-06-04 14:25:28,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=159, PETRI_TRANSITIONS=171} [2024-06-04 14:25:28,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-04 14:25:28,940 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 171 transitions, 1658 flow [2024-06-04 14:25:28,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:28,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:28,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:28,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:25:28,941 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:28,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash -13384598, now seen corresponding path program 3 times [2024-06-04 14:25:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:28,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626447575] [2024-06-04 14:25:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:28,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:29,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:29,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626447575] [2024-06-04 14:25:29,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626447575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:29,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:29,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:29,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721808877] [2024-06-04 14:25:29,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:29,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:29,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 171 transitions, 1658 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:29,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:29,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:29,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:29,519 INFO L124 PetriNetUnfolderBase]: 1602/2851 cut-off events. [2024-06-04 14:25:29,519 INFO L125 PetriNetUnfolderBase]: For 89186/89186 co-relation queries the response was YES. [2024-06-04 14:25:29,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16070 conditions, 2851 events. 1602/2851 cut-off events. For 89186/89186 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17826 event pairs, 414 based on Foata normal form. 12/2855 useless extension candidates. Maximal degree in co-relation 16000. Up to 2183 conditions per place. [2024-06-04 14:25:29,541 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 153 selfloop transitions, 47 changer transitions 0/209 dead transitions. [2024-06-04 14:25:29,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 209 transitions, 2242 flow [2024-06-04 14:25:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:25:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:25:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-04 14:25:29,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5994318181818182 [2024-06-04 14:25:29,542 INFO L175 Difference]: Start difference. First operand has 159 places, 171 transitions, 1658 flow. Second operand 8 states and 211 transitions. [2024-06-04 14:25:29,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 209 transitions, 2242 flow [2024-06-04 14:25:29,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 209 transitions, 2147 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:29,687 INFO L231 Difference]: Finished difference. Result has 165 places, 175 transitions, 1743 flow [2024-06-04 14:25:29,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1743, PETRI_PLACES=165, PETRI_TRANSITIONS=175} [2024-06-04 14:25:29,687 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-04 14:25:29,687 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 175 transitions, 1743 flow [2024-06-04 14:25:29,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:29,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:29,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:29,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:25:29,688 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:29,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1999723830, now seen corresponding path program 4 times [2024-06-04 14:25:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126892956] [2024-06-04 14:25:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:29,812 INFO 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 14:25:29,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:29,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126892956] [2024-06-04 14:25:29,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126892956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:29,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:29,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:29,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929294844] [2024-06-04 14:25:29,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:29,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:29,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:29,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:29,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 175 transitions, 1743 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:29,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:29,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:29,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:30,188 INFO L124 PetriNetUnfolderBase]: 1582/2811 cut-off events. [2024-06-04 14:25:30,188 INFO L125 PetriNetUnfolderBase]: For 86777/86777 co-relation queries the response was YES. [2024-06-04 14:25:30,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15490 conditions, 2811 events. 1582/2811 cut-off events. For 86777/86777 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17560 event pairs, 359 based on Foata normal form. 12/2815 useless extension candidates. Maximal degree in co-relation 15418. Up to 1591 conditions per place. [2024-06-04 14:25:30,207 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 143 selfloop transitions, 57 changer transitions 0/209 dead transitions. [2024-06-04 14:25:30,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2215 flow [2024-06-04 14:25:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:25:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:25:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-04 14:25:30,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-06-04 14:25:30,208 INFO L175 Difference]: Start difference. First operand has 165 places, 175 transitions, 1743 flow. Second operand 8 states and 210 transitions. [2024-06-04 14:25:30,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2215 flow [2024-06-04 14:25:30,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 209 transitions, 2122 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:30,342 INFO L231 Difference]: Finished difference. Result has 169 places, 174 transitions, 1724 flow [2024-06-04 14:25:30,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1724, PETRI_PLACES=169, PETRI_TRANSITIONS=174} [2024-06-04 14:25:30,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-04 14:25:30,343 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 174 transitions, 1724 flow [2024-06-04 14:25:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:30,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:30,343 INFO 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 14:25:30,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:25:30,343 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 14:25:30,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 755427385, now seen corresponding path program 1 times [2024-06-04 14:25:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:30,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643513128] [2024-06-04 14:25:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:30,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:30,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:30,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643513128] [2024-06-04 14:25:30,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643513128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:30,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:30,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:30,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356815378] [2024-06-04 14:25:30,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:30,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:30,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:30,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 174 transitions, 1724 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:30,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:30,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:30,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:30,855 INFO L124 PetriNetUnfolderBase]: 1595/2850 cut-off events. [2024-06-04 14:25:30,855 INFO L125 PetriNetUnfolderBase]: For 84787/84787 co-relation queries the response was YES. [2024-06-04 14:25:30,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15708 conditions, 2850 events. 1595/2850 cut-off events. For 84787/84787 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17901 event pairs, 401 based on Foata normal form. 1/2848 useless extension candidates. Maximal degree in co-relation 15635. Up to 2449 conditions per place. [2024-06-04 14:25:30,877 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 168 selfloop transitions, 31 changer transitions 0/208 dead transitions. [2024-06-04 14:25:30,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 208 transitions, 2336 flow [2024-06-04 14:25:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:25:30,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-04 14:25:30,878 INFO L175 Difference]: Start difference. First operand has 169 places, 174 transitions, 1724 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:25:30,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 208 transitions, 2336 flow [2024-06-04 14:25:31,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 208 transitions, 2180 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:25:31,024 INFO L231 Difference]: Finished difference. Result has 170 places, 181 transitions, 1719 flow [2024-06-04 14:25:31,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=170, PETRI_TRANSITIONS=181} [2024-06-04 14:25:31,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-04 14:25:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 181 transitions, 1719 flow [2024-06-04 14:25:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:31,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:25:31,026 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 14:25:31,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash 546483573, now seen corresponding path program 2 times [2024-06-04 14:25:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594994503] [2024-06-04 14:25:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:31,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:31,163 INFO 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 14:25:31,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:31,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594994503] [2024-06-04 14:25:31,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594994503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:31,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:31,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:31,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163997486] [2024-06-04 14:25:31,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:31,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:31,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:31,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 181 transitions, 1719 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:31,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:31,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:31,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:31,555 INFO L124 PetriNetUnfolderBase]: 1605/2868 cut-off events. [2024-06-04 14:25:31,555 INFO L125 PetriNetUnfolderBase]: For 86986/86986 co-relation queries the response was YES. [2024-06-04 14:25:31,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15751 conditions, 2868 events. 1605/2868 cut-off events. For 86986/86986 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18013 event pairs, 401 based on Foata normal form. 1/2866 useless extension candidates. Maximal degree in co-relation 15677. Up to 2459 conditions per place. [2024-06-04 14:25:31,576 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 169 selfloop transitions, 38 changer transitions 0/216 dead transitions. [2024-06-04 14:25:31,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 216 transitions, 2354 flow [2024-06-04 14:25:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:25:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:25:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-04 14:25:31,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631313131313131 [2024-06-04 14:25:31,578 INFO L175 Difference]: Start difference. First operand has 170 places, 181 transitions, 1719 flow. Second operand 9 states and 223 transitions. [2024-06-04 14:25:31,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 216 transitions, 2354 flow [2024-06-04 14:25:31,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 216 transitions, 2224 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:31,713 INFO L231 Difference]: Finished difference. Result has 175 places, 187 transitions, 1738 flow [2024-06-04 14:25:31,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1738, PETRI_PLACES=175, PETRI_TRANSITIONS=187} [2024-06-04 14:25:31,714 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-04 14:25:31,714 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 187 transitions, 1738 flow [2024-06-04 14:25:31,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:31,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:31,714 INFO 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 14:25:31,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:25:31,715 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 14:25:31,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash 536957397, now seen corresponding path program 1 times [2024-06-04 14:25:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:31,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237792692] [2024-06-04 14:25:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:31,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237792692] [2024-06-04 14:25:31,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237792692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:31,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:31,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:31,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086220665] [2024-06-04 14:25:31,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:31,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:31,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:31,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:31,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 187 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:31,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:31,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:31,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:32,225 INFO L124 PetriNetUnfolderBase]: 1613/2880 cut-off events. [2024-06-04 14:25:32,226 INFO L125 PetriNetUnfolderBase]: For 91325/91325 co-relation queries the response was YES. [2024-06-04 14:25:32,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15873 conditions, 2880 events. 1613/2880 cut-off events. For 91325/91325 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18020 event pairs, 320 based on Foata normal form. 2/2879 useless extension candidates. Maximal degree in co-relation 15799. Up to 2441 conditions per place. [2024-06-04 14:25:32,249 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 180 selfloop transitions, 31 changer transitions 0/220 dead transitions. [2024-06-04 14:25:32,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 220 transitions, 2364 flow [2024-06-04 14:25:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:25:32,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-04 14:25:32,250 INFO L175 Difference]: Start difference. First operand has 175 places, 187 transitions, 1738 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:25:32,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 220 transitions, 2364 flow [2024-06-04 14:25:32,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 220 transitions, 2282 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:25:32,420 INFO L231 Difference]: Finished difference. Result has 176 places, 191 transitions, 1775 flow [2024-06-04 14:25:32,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1775, PETRI_PLACES=176, PETRI_TRANSITIONS=191} [2024-06-04 14:25:32,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-04 14:25:32,421 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 191 transitions, 1775 flow [2024-06-04 14:25:32,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:32,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:32,421 INFO 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 14:25:32,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:25:32,421 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 14:25:32,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2080317593, now seen corresponding path program 2 times [2024-06-04 14:25:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:32,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893501147] [2024-06-04 14:25:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:32,554 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 14:25:32,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893501147] [2024-06-04 14:25:32,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893501147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:32,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:32,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:32,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995843814] [2024-06-04 14:25:32,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:32,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:32,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:32,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 191 transitions, 1775 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:32,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:32,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:32,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:32,926 INFO L124 PetriNetUnfolderBase]: 1621/2892 cut-off events. [2024-06-04 14:25:32,926 INFO L125 PetriNetUnfolderBase]: For 95578/95578 co-relation queries the response was YES. [2024-06-04 14:25:32,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16122 conditions, 2892 events. 1621/2892 cut-off events. For 95578/95578 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18146 event pairs, 399 based on Foata normal form. 2/2891 useless extension candidates. Maximal degree in co-relation 16047. Up to 2498 conditions per place. [2024-06-04 14:25:32,948 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 180 selfloop transitions, 28 changer transitions 0/217 dead transitions. [2024-06-04 14:25:32,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 217 transitions, 2279 flow [2024-06-04 14:25:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:25:32,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-04 14:25:32,949 INFO L175 Difference]: Start difference. First operand has 176 places, 191 transitions, 1775 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:25:32,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 217 transitions, 2279 flow [2024-06-04 14:25:33,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 217 transitions, 2209 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:33,114 INFO L231 Difference]: Finished difference. Result has 180 places, 193 transitions, 1798 flow [2024-06-04 14:25:33,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1798, PETRI_PLACES=180, PETRI_TRANSITIONS=193} [2024-06-04 14:25:33,114 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-04 14:25:33,115 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 193 transitions, 1798 flow [2024-06-04 14:25:33,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:33,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:33,115 INFO 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 14:25:33,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:25:33,115 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 14:25:33,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1940382663, now seen corresponding path program 3 times [2024-06-04 14:25:33,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:33,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131685699] [2024-06-04 14:25:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:33,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:33,230 INFO 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 14:25:33,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:33,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131685699] [2024-06-04 14:25:33,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131685699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:33,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:33,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:33,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218506591] [2024-06-04 14:25:33,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:33,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:33,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:33,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:33,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:33,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 193 transitions, 1798 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:33,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:33,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:33,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:33,593 INFO L124 PetriNetUnfolderBase]: 1634/2910 cut-off events. [2024-06-04 14:25:33,593 INFO L125 PetriNetUnfolderBase]: For 99506/99506 co-relation queries the response was YES. [2024-06-04 14:25:33,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 2910 events. 1634/2910 cut-off events. For 99506/99506 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18261 event pairs, 405 based on Foata normal form. 1/2905 useless extension candidates. Maximal degree in co-relation 16283. Up to 2411 conditions per place. [2024-06-04 14:25:33,616 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 148 selfloop transitions, 71 changer transitions 0/228 dead transitions. [2024-06-04 14:25:33,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 228 transitions, 2672 flow [2024-06-04 14:25:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-04 14:25:33,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038961038961039 [2024-06-04 14:25:33,617 INFO L175 Difference]: Start difference. First operand has 180 places, 193 transitions, 1798 flow. Second operand 7 states and 186 transitions. [2024-06-04 14:25:33,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 228 transitions, 2672 flow [2024-06-04 14:25:33,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 228 transitions, 2609 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:33,749 INFO L231 Difference]: Finished difference. Result has 182 places, 202 transitions, 1997 flow [2024-06-04 14:25:33,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1997, PETRI_PLACES=182, PETRI_TRANSITIONS=202} [2024-06-04 14:25:33,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-04 14:25:33,750 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 202 transitions, 1997 flow [2024-06-04 14:25:33,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:33,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:33,750 INFO 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 14:25:33,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:25:33,750 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 14:25:33,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 832175477, now seen corresponding path program 4 times [2024-06-04 14:25:33,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:33,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813068793] [2024-06-04 14:25:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:33,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813068793] [2024-06-04 14:25:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813068793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:33,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:33,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79571529] [2024-06-04 14:25:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:33,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:33,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:33,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 202 transitions, 1997 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:33,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:33,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:33,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:34,260 INFO L124 PetriNetUnfolderBase]: 1639/2919 cut-off events. [2024-06-04 14:25:34,261 INFO L125 PetriNetUnfolderBase]: For 105291/105291 co-relation queries the response was YES. [2024-06-04 14:25:34,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16878 conditions, 2919 events. 1639/2919 cut-off events. For 105291/105291 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18404 event pairs, 405 based on Foata normal form. 1/2914 useless extension candidates. Maximal degree in co-relation 16800. Up to 2417 conditions per place. [2024-06-04 14:25:34,286 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 145 selfloop transitions, 73 changer transitions 0/227 dead transitions. [2024-06-04 14:25:34,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 227 transitions, 2709 flow [2024-06-04 14:25:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:25:34,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:25:34,287 INFO L175 Difference]: Start difference. First operand has 182 places, 202 transitions, 1997 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:25:34,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 227 transitions, 2709 flow [2024-06-04 14:25:34,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 227 transitions, 2565 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:34,458 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 2047 flow [2024-06-04 14:25:34,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2047, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2024-06-04 14:25:34,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-04 14:25:34,459 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 2047 flow [2024-06-04 14:25:34,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:34,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:34,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:34,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:25:34,459 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 14:25:34,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1004665367, now seen corresponding path program 5 times [2024-06-04 14:25:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:34,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764693515] [2024-06-04 14:25:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:34,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764693515] [2024-06-04 14:25:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764693515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:34,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:34,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255772490] [2024-06-04 14:25:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:34,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:34,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:34,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:34,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 2047 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:34,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:34,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:34,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:34,905 INFO L124 PetriNetUnfolderBase]: 1660/2954 cut-off events. [2024-06-04 14:25:34,905 INFO L125 PetriNetUnfolderBase]: For 109860/109860 co-relation queries the response was YES. [2024-06-04 14:25:34,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16938 conditions, 2954 events. 1660/2954 cut-off events. For 109860/109860 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18657 event pairs, 405 based on Foata normal form. 1/2949 useless extension candidates. Maximal degree in co-relation 16859. Up to 2441 conditions per place. [2024-06-04 14:25:34,931 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 82 changer transitions 0/234 dead transitions. [2024-06-04 14:25:34,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 234 transitions, 2920 flow [2024-06-04 14:25:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 14:25:34,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-04 14:25:34,932 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 2047 flow. Second operand 7 states and 180 transitions. [2024-06-04 14:25:34,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 234 transitions, 2920 flow [2024-06-04 14:25:35,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 234 transitions, 2786 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:35,222 INFO L231 Difference]: Finished difference. Result has 189 places, 214 transitions, 2182 flow [2024-06-04 14:25:35,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2182, PETRI_PLACES=189, PETRI_TRANSITIONS=214} [2024-06-04 14:25:35,222 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-04 14:25:35,222 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 214 transitions, 2182 flow [2024-06-04 14:25:35,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:35,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:35,223 INFO 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 14:25:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:25:35,223 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 14:25:35,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1356264075, now seen corresponding path program 6 times [2024-06-04 14:25:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:35,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311541505] [2024-06-04 14:25:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:35,351 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 14:25:35,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311541505] [2024-06-04 14:25:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311541505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:35,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:35,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:35,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104152692] [2024-06-04 14:25:35,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:35,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:35,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:35,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:35,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:35,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 214 transitions, 2182 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:35,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:35,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:35,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:35,738 INFO L124 PetriNetUnfolderBase]: 1657/2954 cut-off events. [2024-06-04 14:25:35,739 INFO L125 PetriNetUnfolderBase]: For 113062/113062 co-relation queries the response was YES. [2024-06-04 14:25:35,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16980 conditions, 2954 events. 1657/2954 cut-off events. For 113062/113062 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18649 event pairs, 399 based on Foata normal form. 1/2952 useless extension candidates. Maximal degree in co-relation 16900. Up to 2551 conditions per place. [2024-06-04 14:25:35,760 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 194 selfloop transitions, 28 changer transitions 0/231 dead transitions. [2024-06-04 14:25:35,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 231 transitions, 2668 flow [2024-06-04 14:25:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:25:35,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-04 14:25:35,762 INFO L175 Difference]: Start difference. First operand has 189 places, 214 transitions, 2182 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:25:35,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 231 transitions, 2668 flow [2024-06-04 14:25:36,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 231 transitions, 2570 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:36,082 INFO L231 Difference]: Finished difference. Result has 194 places, 214 transitions, 2146 flow [2024-06-04 14:25:36,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=194, PETRI_TRANSITIONS=214} [2024-06-04 14:25:36,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-04 14:25:36,083 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 214 transitions, 2146 flow [2024-06-04 14:25:36,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:36,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:36,083 INFO 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 14:25:36,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:25:36,083 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 14:25:36,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:36,084 INFO L85 PathProgramCache]: Analyzing trace with hash 76603355, now seen corresponding path program 3 times [2024-06-04 14:25:36,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:36,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146219760] [2024-06-04 14:25:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:36,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:36,207 INFO 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 14:25:36,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:36,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146219760] [2024-06-04 14:25:36,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146219760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:36,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:36,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:36,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186810862] [2024-06-04 14:25:36,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:36,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:36,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:36,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:36,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:36,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:36,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 214 transitions, 2146 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:36,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:36,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:36,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:36,558 INFO L124 PetriNetUnfolderBase]: 1665/2966 cut-off events. [2024-06-04 14:25:36,559 INFO L125 PetriNetUnfolderBase]: For 118621/118621 co-relation queries the response was YES. [2024-06-04 14:25:36,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17015 conditions, 2966 events. 1665/2966 cut-off events. For 118621/118621 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18689 event pairs, 399 based on Foata normal form. 2/2965 useless extension candidates. Maximal degree in co-relation 16934. Up to 2560 conditions per place. [2024-06-04 14:25:36,582 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 198 selfloop transitions, 27 changer transitions 0/234 dead transitions. [2024-06-04 14:25:36,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 234 transitions, 2662 flow [2024-06-04 14:25:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:25:36,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-04 14:25:36,583 INFO L175 Difference]: Start difference. First operand has 194 places, 214 transitions, 2146 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:25:36,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 234 transitions, 2662 flow [2024-06-04 14:25:36,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 234 transitions, 2600 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:36,897 INFO L231 Difference]: Finished difference. Result has 196 places, 216 transitions, 2169 flow [2024-06-04 14:25:36,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=196, PETRI_TRANSITIONS=216} [2024-06-04 14:25:36,897 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-04 14:25:36,898 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 216 transitions, 2169 flow [2024-06-04 14:25:36,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:36,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:36,898 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 14:25:36,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:25:36,898 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 14:25:36,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash 832004791, now seen corresponding path program 1 times [2024-06-04 14:25:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:36,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669125223] [2024-06-04 14:25:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:36,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669125223] [2024-06-04 14:25:37,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669125223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:37,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:37,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:37,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699887616] [2024-06-04 14:25:37,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:37,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:37,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 216 transitions, 2169 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:37,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:37,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:37,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:37,458 INFO L124 PetriNetUnfolderBase]: 1670/2970 cut-off events. [2024-06-04 14:25:37,458 INFO L125 PetriNetUnfolderBase]: For 121988/121988 co-relation queries the response was YES. [2024-06-04 14:25:37,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 2970 events. 1670/2970 cut-off events. For 121988/121988 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18754 event pairs, 405 based on Foata normal form. 1/2965 useless extension candidates. Maximal degree in co-relation 17087. Up to 2540 conditions per place. [2024-06-04 14:25:37,481 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 205 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-04 14:25:37,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 242 transitions, 2731 flow [2024-06-04 14:25:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:25:37,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-04 14:25:37,483 INFO L175 Difference]: Start difference. First operand has 196 places, 216 transitions, 2169 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:25:37,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 242 transitions, 2731 flow [2024-06-04 14:25:37,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 242 transitions, 2666 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:37,802 INFO L231 Difference]: Finished difference. Result has 198 places, 219 transitions, 2210 flow [2024-06-04 14:25:37,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2210, PETRI_PLACES=198, PETRI_TRANSITIONS=219} [2024-06-04 14:25:37,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-04 14:25:37,802 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 219 transitions, 2210 flow [2024-06-04 14:25:37,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:37,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:37,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:37,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:25:37,803 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 14:25:37,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1928947879, now seen corresponding path program 2 times [2024-06-04 14:25:37,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:37,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260780155] [2024-06-04 14:25:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:38,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:38,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260780155] [2024-06-04 14:25:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260780155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:38,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:38,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:38,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801627720] [2024-06-04 14:25:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:38,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:38,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:38,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:38,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:38,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 219 transitions, 2210 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:38,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:38,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:38,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:38,387 INFO L124 PetriNetUnfolderBase]: 1683/2989 cut-off events. [2024-06-04 14:25:38,388 INFO L125 PetriNetUnfolderBase]: For 128232/128232 co-relation queries the response was YES. [2024-06-04 14:25:38,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17695 conditions, 2989 events. 1683/2989 cut-off events. For 128232/128232 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18902 event pairs, 411 based on Foata normal form. 1/2981 useless extension candidates. Maximal degree in co-relation 17612. Up to 2489 conditions per place. [2024-06-04 14:25:38,412 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 187 selfloop transitions, 61 changer transitions 0/257 dead transitions. [2024-06-04 14:25:38,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 257 transitions, 3134 flow [2024-06-04 14:25:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:25:38,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-04 14:25:38,413 INFO L175 Difference]: Start difference. First operand has 198 places, 219 transitions, 2210 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:25:38,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 257 transitions, 3134 flow [2024-06-04 14:25:38,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 257 transitions, 3050 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:38,772 INFO L231 Difference]: Finished difference. Result has 201 places, 235 transitions, 2464 flow [2024-06-04 14:25:38,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2464, PETRI_PLACES=201, PETRI_TRANSITIONS=235} [2024-06-04 14:25:38,773 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-04 14:25:38,773 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 235 transitions, 2464 flow [2024-06-04 14:25:38,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:38,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:38,773 INFO 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 14:25:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:25:38,774 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 14:25:38,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1928940935, now seen corresponding path program 1 times [2024-06-04 14:25:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687237264] [2024-06-04 14:25:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:38,902 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 14:25:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687237264] [2024-06-04 14:25:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687237264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:38,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:38,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957079404] [2024-06-04 14:25:38,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:38,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:38,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:38,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 235 transitions, 2464 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:38,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:38,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:38,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:39,324 INFO L124 PetriNetUnfolderBase]: 1696/3013 cut-off events. [2024-06-04 14:25:39,324 INFO L125 PetriNetUnfolderBase]: For 135812/135812 co-relation queries the response was YES. [2024-06-04 14:25:39,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18310 conditions, 3013 events. 1696/3013 cut-off events. For 135812/135812 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19081 event pairs, 406 based on Foata normal form. 1/3006 useless extension candidates. Maximal degree in co-relation 18225. Up to 2535 conditions per place. [2024-06-04 14:25:39,347 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 207 selfloop transitions, 56 changer transitions 0/272 dead transitions. [2024-06-04 14:25:39,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 272 transitions, 3398 flow [2024-06-04 14:25:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:25:39,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:25:39,348 INFO L175 Difference]: Start difference. First operand has 201 places, 235 transitions, 2464 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:25:39,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 272 transitions, 3398 flow [2024-06-04 14:25:39,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 272 transitions, 3342 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-04 14:25:39,648 INFO L231 Difference]: Finished difference. Result has 208 places, 250 transitions, 2725 flow [2024-06-04 14:25:39,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2725, PETRI_PLACES=208, PETRI_TRANSITIONS=250} [2024-06-04 14:25:39,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-04 14:25:39,649 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 250 transitions, 2725 flow [2024-06-04 14:25:39,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:39,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:39,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:39,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:25:39,650 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 14:25:39,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1351495531, now seen corresponding path program 3 times [2024-06-04 14:25:39,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:39,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211961192] [2024-06-04 14:25:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:39,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:39,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211961192] [2024-06-04 14:25:39,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211961192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:39,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:39,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:39,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808499662] [2024-06-04 14:25:39,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:39,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:39,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:39,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:39,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:39,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:39,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 250 transitions, 2725 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:39,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:39,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:39,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:40,137 INFO L124 PetriNetUnfolderBase]: 1709/3033 cut-off events. [2024-06-04 14:25:40,138 INFO L125 PetriNetUnfolderBase]: For 143483/143483 co-relation queries the response was YES. [2024-06-04 14:25:40,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18967 conditions, 3033 events. 1709/3033 cut-off events. For 143483/143483 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19218 event pairs, 410 based on Foata normal form. 1/3025 useless extension candidates. Maximal degree in co-relation 18878. Up to 2522 conditions per place. [2024-06-04 14:25:40,166 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 197 selfloop transitions, 69 changer transitions 0/275 dead transitions. [2024-06-04 14:25:40,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 275 transitions, 3603 flow [2024-06-04 14:25:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:25:40,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-04 14:25:40,168 INFO L175 Difference]: Start difference. First operand has 208 places, 250 transitions, 2725 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:25:40,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 275 transitions, 3603 flow [2024-06-04 14:25:40,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 275 transitions, 3532 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:40,514 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 2890 flow [2024-06-04 14:25:40,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2654, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2890, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-04 14:25:40,514 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-04 14:25:40,514 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 2890 flow [2024-06-04 14:25:40,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:40,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:40,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:40,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:25:40,515 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 14:25:40,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1351488587, now seen corresponding path program 2 times [2024-06-04 14:25:40,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:40,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132907746] [2024-06-04 14:25:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:40,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:40,628 INFO 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 14:25:40,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:40,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132907746] [2024-06-04 14:25:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132907746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:40,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:40,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500838003] [2024-06-04 14:25:40,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:40,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:40,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 2890 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:40,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:40,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:40,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:41,065 INFO L124 PetriNetUnfolderBase]: 1730/3070 cut-off events. [2024-06-04 14:25:41,066 INFO L125 PetriNetUnfolderBase]: For 151818/151818 co-relation queries the response was YES. [2024-06-04 14:25:41,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19509 conditions, 3070 events. 1730/3070 cut-off events. For 151818/151818 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19467 event pairs, 406 based on Foata normal form. 1/3063 useless extension candidates. Maximal degree in co-relation 19418. Up to 2577 conditions per place. [2024-06-04 14:25:41,090 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 213 selfloop transitions, 63 changer transitions 0/285 dead transitions. [2024-06-04 14:25:41,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 285 transitions, 3923 flow [2024-06-04 14:25:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:25:41,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-04 14:25:41,092 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 2890 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:25:41,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 285 transitions, 3923 flow [2024-06-04 14:25:41,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 285 transitions, 3811 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 14:25:41,436 INFO L231 Difference]: Finished difference. Result has 217 places, 265 transitions, 3025 flow [2024-06-04 14:25:41,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3025, PETRI_PLACES=217, PETRI_TRANSITIONS=265} [2024-06-04 14:25:41,436 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-04 14:25:41,436 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 265 transitions, 3025 flow [2024-06-04 14:25:41,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:41,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:41,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:41,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:25:41,437 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 14:25:41,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1342917707, now seen corresponding path program 3 times [2024-06-04 14:25:41,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:41,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576236351] [2024-06-04 14:25:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:41,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576236351] [2024-06-04 14:25:41,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576236351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:41,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:41,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:41,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392264030] [2024-06-04 14:25:41,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:41,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:41,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:41,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:41,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 265 transitions, 3025 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:41,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:41,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:41,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:41,943 INFO L124 PetriNetUnfolderBase]: 1727/3066 cut-off events. [2024-06-04 14:25:41,943 INFO L125 PetriNetUnfolderBase]: For 155722/155722 co-relation queries the response was YES. [2024-06-04 14:25:41,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19512 conditions, 3066 events. 1727/3066 cut-off events. For 155722/155722 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19443 event pairs, 406 based on Foata normal form. 1/3059 useless extension candidates. Maximal degree in co-relation 19420. Up to 2574 conditions per place. [2024-06-04 14:25:41,972 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 210 selfloop transitions, 65 changer transitions 0/284 dead transitions. [2024-06-04 14:25:41,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 284 transitions, 3837 flow [2024-06-04 14:25:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:25:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-04 14:25:41,973 INFO L175 Difference]: Start difference. First operand has 217 places, 265 transitions, 3025 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:25:41,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 284 transitions, 3837 flow [2024-06-04 14:25:42,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 284 transitions, 3727 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-04 14:25:42,387 INFO L231 Difference]: Finished difference. Result has 222 places, 265 transitions, 3051 flow [2024-06-04 14:25:42,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3051, PETRI_PLACES=222, PETRI_TRANSITIONS=265} [2024-06-04 14:25:42,387 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-06-04 14:25:42,387 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 265 transitions, 3051 flow [2024-06-04 14:25:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:42,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:42,388 INFO 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 14:25:42,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:25:42,388 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 14:25:42,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1342906795, now seen corresponding path program 1 times [2024-06-04 14:25:42,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:42,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109746749] [2024-06-04 14:25:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109746749] [2024-06-04 14:25:42,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109746749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:42,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:42,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:42,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893829377] [2024-06-04 14:25:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:42,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:42,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:42,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:25:42,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 265 transitions, 3051 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:42,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:25:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:42,974 INFO L124 PetriNetUnfolderBase]: 1668/3002 cut-off events. [2024-06-04 14:25:42,974 INFO L125 PetriNetUnfolderBase]: For 175267/175267 co-relation queries the response was YES. [2024-06-04 14:25:42,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19404 conditions, 3002 events. 1668/3002 cut-off events. For 175267/175267 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19287 event pairs, 382 based on Foata normal form. 10/2987 useless extension candidates. Maximal degree in co-relation 19311. Up to 2415 conditions per place. [2024-06-04 14:25:43,003 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 207 selfloop transitions, 40 changer transitions 0/287 dead transitions. [2024-06-04 14:25:43,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 3637 flow [2024-06-04 14:25:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:25:43,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-04 14:25:43,005 INFO L175 Difference]: Start difference. First operand has 222 places, 265 transitions, 3051 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:25:43,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 3637 flow [2024-06-04 14:25:43,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 287 transitions, 3502 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:43,454 INFO L231 Difference]: Finished difference. Result has 224 places, 266 transitions, 3022 flow [2024-06-04 14:25:43,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3022, PETRI_PLACES=224, PETRI_TRANSITIONS=266} [2024-06-04 14:25:43,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-04 14:25:43,455 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 266 transitions, 3022 flow [2024-06-04 14:25:43,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:43,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:43,455 INFO 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 14:25:43,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:25:43,455 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 14:25:43,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1738681897, now seen corresponding path program 7 times [2024-06-04 14:25:43,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:43,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805377597] [2024-06-04 14:25:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:43,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805377597] [2024-06-04 14:25:43,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805377597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:43,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:43,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:43,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693323984] [2024-06-04 14:25:43,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:43,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:43,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:43,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:43,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 266 transitions, 3022 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:43,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:43,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:43,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:43,976 INFO L124 PetriNetUnfolderBase]: 1768/3125 cut-off events. [2024-06-04 14:25:43,977 INFO L125 PetriNetUnfolderBase]: For 167475/167475 co-relation queries the response was YES. [2024-06-04 14:25:43,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20071 conditions, 3125 events. 1768/3125 cut-off events. For 167475/167475 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19911 event pairs, 420 based on Foata normal form. 1/3115 useless extension candidates. Maximal degree in co-relation 19977. Up to 2598 conditions per place. [2024-06-04 14:25:44,008 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 196 selfloop transitions, 86 changer transitions 0/291 dead transitions. [2024-06-04 14:25:44,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 291 transitions, 3901 flow [2024-06-04 14:25:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:25:44,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:25:44,009 INFO L175 Difference]: Start difference. First operand has 224 places, 266 transitions, 3022 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:25:44,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 291 transitions, 3901 flow [2024-06-04 14:25:44,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 291 transitions, 3817 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:44,388 INFO L231 Difference]: Finished difference. Result has 226 places, 269 transitions, 3153 flow [2024-06-04 14:25:44,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3153, PETRI_PLACES=226, PETRI_TRANSITIONS=269} [2024-06-04 14:25:44,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-04 14:25:44,389 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 269 transitions, 3153 flow [2024-06-04 14:25:44,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:44,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:44,389 INFO 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 14:25:44,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:25:44,389 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 14:25:44,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:44,390 INFO L85 PathProgramCache]: Analyzing trace with hash 311620363, now seen corresponding path program 8 times [2024-06-04 14:25:44,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:44,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175751298] [2024-06-04 14:25:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:44,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:44,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175751298] [2024-06-04 14:25:44,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175751298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:44,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:44,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:44,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961489976] [2024-06-04 14:25:44,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:44,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:44,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 269 transitions, 3153 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:44,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:44,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:44,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:44,886 INFO L124 PetriNetUnfolderBase]: 1765/3121 cut-off events. [2024-06-04 14:25:44,886 INFO L125 PetriNetUnfolderBase]: For 171184/171184 co-relation queries the response was YES. [2024-06-04 14:25:44,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20129 conditions, 3121 events. 1765/3121 cut-off events. For 171184/171184 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19837 event pairs, 420 based on Foata normal form. 1/3111 useless extension candidates. Maximal degree in co-relation 20034. Up to 2595 conditions per place. [2024-06-04 14:25:44,966 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 195 selfloop transitions, 84 changer transitions 0/288 dead transitions. [2024-06-04 14:25:44,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 288 transitions, 3985 flow [2024-06-04 14:25:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 14:25:44,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-04 14:25:44,967 INFO L175 Difference]: Start difference. First operand has 226 places, 269 transitions, 3153 flow. Second operand 7 states and 180 transitions. [2024-06-04 14:25:44,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 288 transitions, 3985 flow [2024-06-04 14:25:45,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 288 transitions, 3687 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:25:45,478 INFO L231 Difference]: Finished difference. Result has 226 places, 269 transitions, 3029 flow [2024-06-04 14:25:45,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3029, PETRI_PLACES=226, PETRI_TRANSITIONS=269} [2024-06-04 14:25:45,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-04 14:25:45,479 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 269 transitions, 3029 flow [2024-06-04 14:25:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:45,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:45,479 INFO 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 14:25:45,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:25:45,479 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 14:25:45,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash -55861737, now seen corresponding path program 9 times [2024-06-04 14:25:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548458712] [2024-06-04 14:25:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:45,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548458712] [2024-06-04 14:25:45,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548458712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:45,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:45,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:45,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867846576] [2024-06-04 14:25:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:45,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:45,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:45,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:45,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 269 transitions, 3029 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:45,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:45,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:45,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:46,017 INFO L124 PetriNetUnfolderBase]: 1770/3130 cut-off events. [2024-06-04 14:25:46,017 INFO L125 PetriNetUnfolderBase]: For 175868/175868 co-relation queries the response was YES. [2024-06-04 14:25:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20066 conditions, 3130 events. 1770/3130 cut-off events. For 175868/175868 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19929 event pairs, 420 based on Foata normal form. 1/3120 useless extension candidates. Maximal degree in co-relation 19972. Up to 2601 conditions per place. [2024-06-04 14:25:46,048 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 89 changer transitions 0/287 dead transitions. [2024-06-04 14:25:46,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 287 transitions, 3766 flow [2024-06-04 14:25:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:25:46,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:25:46,051 INFO L175 Difference]: Start difference. First operand has 226 places, 269 transitions, 3029 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:25:46,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 287 transitions, 3766 flow [2024-06-04 14:25:46,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 287 transitions, 3580 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:46,391 INFO L231 Difference]: Finished difference. Result has 228 places, 272 transitions, 3056 flow [2024-06-04 14:25:46,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3056, PETRI_PLACES=228, PETRI_TRANSITIONS=272} [2024-06-04 14:25:46,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-04 14:25:46,392 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 3056 flow [2024-06-04 14:25:46,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:46,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:46,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:46,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:25:46,392 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 14:25:46,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash -437667689, now seen corresponding path program 10 times [2024-06-04 14:25:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663277375] [2024-06-04 14:25:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:46,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:46,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663277375] [2024-06-04 14:25:46,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663277375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:46,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:46,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:46,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235108309] [2024-06-04 14:25:46,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:46,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:46,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:46,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:46,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 272 transitions, 3056 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:46,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:46,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:46,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:46,937 INFO L124 PetriNetUnfolderBase]: 1767/3118 cut-off events. [2024-06-04 14:25:46,937 INFO L125 PetriNetUnfolderBase]: For 180109/180109 co-relation queries the response was YES. [2024-06-04 14:25:46,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20079 conditions, 3118 events. 1767/3118 cut-off events. For 180109/180109 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19908 event pairs, 438 based on Foata normal form. 1/3105 useless extension candidates. Maximal degree in co-relation 19984. Up to 2598 conditions per place. [2024-06-04 14:25:46,970 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 186 selfloop transitions, 89 changer transitions 0/284 dead transitions. [2024-06-04 14:25:46,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 284 transitions, 3752 flow [2024-06-04 14:25:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:25:46,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 14:25:46,976 INFO L175 Difference]: Start difference. First operand has 228 places, 272 transitions, 3056 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:25:46,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 284 transitions, 3752 flow [2024-06-04 14:25:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 284 transitions, 3616 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:47,351 INFO L231 Difference]: Finished difference. Result has 231 places, 272 transitions, 3104 flow [2024-06-04 14:25:47,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3104, PETRI_PLACES=231, PETRI_TRANSITIONS=272} [2024-06-04 14:25:47,353 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-04 14:25:47,353 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 272 transitions, 3104 flow [2024-06-04 14:25:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:47,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:47,354 INFO 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 14:25:47,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:25:47,354 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 14:25:47,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2097489269, now seen corresponding path program 11 times [2024-06-04 14:25:47,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:47,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156309598] [2024-06-04 14:25:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:47,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156309598] [2024-06-04 14:25:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156309598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:47,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:47,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624433159] [2024-06-04 14:25:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:47,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:47,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:47,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 272 transitions, 3104 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:47,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:47,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:47,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:47,866 INFO L124 PetriNetUnfolderBase]: 1764/3114 cut-off events. [2024-06-04 14:25:47,866 INFO L125 PetriNetUnfolderBase]: For 184289/184289 co-relation queries the response was YES. [2024-06-04 14:25:47,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20108 conditions, 3114 events. 1764/3114 cut-off events. For 184289/184289 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19826 event pairs, 438 based on Foata normal form. 1/3101 useless extension candidates. Maximal degree in co-relation 20012. Up to 2595 conditions per place. [2024-06-04 14:25:47,895 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 188 selfloop transitions, 87 changer transitions 0/284 dead transitions. [2024-06-04 14:25:47,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 284 transitions, 3802 flow [2024-06-04 14:25:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:25:47,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-04 14:25:47,896 INFO L175 Difference]: Start difference. First operand has 231 places, 272 transitions, 3104 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:25:47,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 284 transitions, 3802 flow [2024-06-04 14:25:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 284 transitions, 3580 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:25:48,325 INFO L231 Difference]: Finished difference. Result has 232 places, 272 transitions, 3062 flow [2024-06-04 14:25:48,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2882, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3062, PETRI_PLACES=232, PETRI_TRANSITIONS=272} [2024-06-04 14:25:48,326 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-04 14:25:48,326 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 272 transitions, 3062 flow [2024-06-04 14:25:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:48,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:48,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:25:48,326 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 14:25:48,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2092727669, now seen corresponding path program 12 times [2024-06-04 14:25:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349639721] [2024-06-04 14:25:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:48,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349639721] [2024-06-04 14:25:48,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349639721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:48,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:48,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:48,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291091226] [2024-06-04 14:25:48,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:48,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:48,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:48,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:48,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 272 transitions, 3062 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:48,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:48,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:48,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:48,840 INFO L124 PetriNetUnfolderBase]: 1761/3121 cut-off events. [2024-06-04 14:25:48,840 INFO L125 PetriNetUnfolderBase]: For 186696/186696 co-relation queries the response was YES. [2024-06-04 14:25:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20073 conditions, 3121 events. 1761/3121 cut-off events. For 186696/186696 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19909 event pairs, 414 based on Foata normal form. 1/3114 useless extension candidates. Maximal degree in co-relation 19977. Up to 2703 conditions per place. [2024-06-04 14:25:48,869 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 246 selfloop transitions, 28 changer transitions 0/283 dead transitions. [2024-06-04 14:25:48,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 283 transitions, 3636 flow [2024-06-04 14:25:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:25:48,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-04 14:25:48,870 INFO L175 Difference]: Start difference. First operand has 232 places, 272 transitions, 3062 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:25:48,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 283 transitions, 3636 flow [2024-06-04 14:25:49,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 283 transitions, 3366 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:25:49,330 INFO L231 Difference]: Finished difference. Result has 232 places, 272 transitions, 2854 flow [2024-06-04 14:25:49,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2854, PETRI_PLACES=232, PETRI_TRANSITIONS=272} [2024-06-04 14:25:49,330 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-04 14:25:49,331 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 272 transitions, 2854 flow [2024-06-04 14:25:49,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:49,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:49,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:49,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:25:49,331 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 14:25:49,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2092724693, now seen corresponding path program 4 times [2024-06-04 14:25:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128620094] [2024-06-04 14:25:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:49,452 INFO 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 14:25:49,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128620094] [2024-06-04 14:25:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128620094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:49,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:49,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086223685] [2024-06-04 14:25:49,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:49,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:49,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:49,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 272 transitions, 2854 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:49,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:49,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:49,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:49,883 INFO L124 PetriNetUnfolderBase]: 1756/3114 cut-off events. [2024-06-04 14:25:49,883 INFO L125 PetriNetUnfolderBase]: For 189166/189166 co-relation queries the response was YES. [2024-06-04 14:25:49,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19825 conditions, 3114 events. 1756/3114 cut-off events. For 189166/189166 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19848 event pairs, 413 based on Foata normal form. 2/3108 useless extension candidates. Maximal degree in co-relation 19728. Up to 2693 conditions per place. [2024-06-04 14:25:49,913 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 248 selfloop transitions, 27 changer transitions 0/284 dead transitions. [2024-06-04 14:25:49,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 284 transitions, 3432 flow [2024-06-04 14:25:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:25:49,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-04 14:25:49,914 INFO L175 Difference]: Start difference. First operand has 232 places, 272 transitions, 2854 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:25:49,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 284 transitions, 3432 flow [2024-06-04 14:25:50,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 284 transitions, 3318 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:25:50,576 INFO L231 Difference]: Finished difference. Result has 231 places, 272 transitions, 2799 flow [2024-06-04 14:25:50,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2799, PETRI_PLACES=231, PETRI_TRANSITIONS=272} [2024-06-04 14:25:50,577 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-04 14:25:50,577 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 272 transitions, 2799 flow [2024-06-04 14:25:50,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:50,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:50,577 INFO 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 14:25:50,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:25:50,578 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 14:25:50,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash 306865707, now seen corresponding path program 4 times [2024-06-04 14:25:50,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:50,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340600713] [2024-06-04 14:25:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:50,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:50,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340600713] [2024-06-04 14:25:50,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340600713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:50,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:50,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204516737] [2024-06-04 14:25:50,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:50,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:50,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:50,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:50,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 272 transitions, 2799 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:50,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:50,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:50,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:51,129 INFO L124 PetriNetUnfolderBase]: 1761/3128 cut-off events. [2024-06-04 14:25:51,130 INFO L125 PetriNetUnfolderBase]: For 192499/192499 co-relation queries the response was YES. [2024-06-04 14:25:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19937 conditions, 3128 events. 1761/3128 cut-off events. For 192499/192499 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19988 event pairs, 406 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 19839. Up to 2673 conditions per place. [2024-06-04 14:25:51,158 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 258 selfloop transitions, 28 changer transitions 0/295 dead transitions. [2024-06-04 14:25:51,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 295 transitions, 3466 flow [2024-06-04 14:25:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:25:51,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:25:51,160 INFO L175 Difference]: Start difference. First operand has 231 places, 272 transitions, 2799 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:25:51,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 295 transitions, 3466 flow [2024-06-04 14:25:51,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 295 transitions, 3393 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 14:25:51,856 INFO L231 Difference]: Finished difference. Result has 232 places, 275 transitions, 2839 flow [2024-06-04 14:25:51,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2839, PETRI_PLACES=232, PETRI_TRANSITIONS=275} [2024-06-04 14:25:51,857 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-04 14:25:51,857 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 275 transitions, 2839 flow [2024-06-04 14:25:51,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:51,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:51,857 INFO 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 14:25:51,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:25:51,858 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 14:25:51,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 311627307, now seen corresponding path program 5 times [2024-06-04 14:25:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813696932] [2024-06-04 14:25:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:51,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:51,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813696932] [2024-06-04 14:25:51,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813696932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:51,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:51,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:51,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149627352] [2024-06-04 14:25:51,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:51,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:51,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:52,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:52,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 275 transitions, 2839 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:52,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:52,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:52,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:52,387 INFO L124 PetriNetUnfolderBase]: 1766/3135 cut-off events. [2024-06-04 14:25:52,387 INFO L125 PetriNetUnfolderBase]: For 198472/198472 co-relation queries the response was YES. [2024-06-04 14:25:52,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20096 conditions, 3135 events. 1766/3135 cut-off events. For 198472/198472 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20019 event pairs, 409 based on Foata normal form. 1/3129 useless extension candidates. Maximal degree in co-relation 19997. Up to 2606 conditions per place. [2024-06-04 14:25:52,413 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 215 selfloop transitions, 74 changer transitions 0/298 dead transitions. [2024-06-04 14:25:52,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 298 transitions, 3900 flow [2024-06-04 14:25:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 14:25:52,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-04 14:25:52,415 INFO L175 Difference]: Start difference. First operand has 232 places, 275 transitions, 2839 flow. Second operand 7 states and 180 transitions. [2024-06-04 14:25:52,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 298 transitions, 3900 flow [2024-06-04 14:25:52,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 298 transitions, 3818 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:52,790 INFO L231 Difference]: Finished difference. Result has 234 places, 278 transitions, 2962 flow [2024-06-04 14:25:52,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2757, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2962, PETRI_PLACES=234, PETRI_TRANSITIONS=278} [2024-06-04 14:25:52,791 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-04 14:25:52,791 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 278 transitions, 2962 flow [2024-06-04 14:25:52,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:52,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:52,792 INFO 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 14:25:52,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:25:52,792 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 14:25:52,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1513361993, now seen corresponding path program 6 times [2024-06-04 14:25:52,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:52,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741822506] [2024-06-04 14:25:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:52,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:52,906 INFO 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 14:25:52,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:52,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741822506] [2024-06-04 14:25:52,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741822506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:52,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:52,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:52,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853953076] [2024-06-04 14:25:52,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:52,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:52,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:52,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:52,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 278 transitions, 2962 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:52,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:52,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:52,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:53,347 INFO L124 PetriNetUnfolderBase]: 1771/3146 cut-off events. [2024-06-04 14:25:53,347 INFO L125 PetriNetUnfolderBase]: For 204546/204546 co-relation queries the response was YES. [2024-06-04 14:25:53,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20331 conditions, 3146 events. 1771/3146 cut-off events. For 204546/204546 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20129 event pairs, 406 based on Foata normal form. 1/3142 useless extension candidates. Maximal degree in co-relation 20231. Up to 2674 conditions per place. [2024-06-04 14:25:53,376 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 255 selfloop transitions, 41 changer transitions 0/305 dead transitions. [2024-06-04 14:25:53,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 305 transitions, 3812 flow [2024-06-04 14:25:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:25:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:25:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 14:25:53,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547979797979798 [2024-06-04 14:25:53,377 INFO L175 Difference]: Start difference. First operand has 234 places, 278 transitions, 2962 flow. Second operand 9 states and 217 transitions. [2024-06-04 14:25:53,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 305 transitions, 3812 flow [2024-06-04 14:25:54,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 305 transitions, 3591 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:54,063 INFO L231 Difference]: Finished difference. Result has 241 places, 282 transitions, 2925 flow [2024-06-04 14:25:54,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2925, PETRI_PLACES=241, PETRI_TRANSITIONS=282} [2024-06-04 14:25:54,063 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-04 14:25:54,063 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 282 transitions, 2925 flow [2024-06-04 14:25:54,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:54,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:54,064 INFO 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 14:25:54,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:25:54,064 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 14:25:54,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1972809161, now seen corresponding path program 7 times [2024-06-04 14:25:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:54,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917264086] [2024-06-04 14:25:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:54,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:54,177 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 14:25:54,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:54,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917264086] [2024-06-04 14:25:54,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917264086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:54,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:54,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:54,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211478569] [2024-06-04 14:25:54,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:54,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:54,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:54,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:54,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 282 transitions, 2925 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:54,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:54,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:54,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:54,689 INFO L124 PetriNetUnfolderBase]: 1768/3142 cut-off events. [2024-06-04 14:25:54,689 INFO L125 PetriNetUnfolderBase]: For 207574/207574 co-relation queries the response was YES. [2024-06-04 14:25:54,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20211 conditions, 3142 events. 1768/3142 cut-off events. For 207574/207574 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20083 event pairs, 406 based on Foata normal form. 1/3138 useless extension candidates. Maximal degree in co-relation 20108. Up to 2671 conditions per place. [2024-06-04 14:25:54,720 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 250 selfloop transitions, 40 changer transitions 0/299 dead transitions. [2024-06-04 14:25:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 299 transitions, 3547 flow [2024-06-04 14:25:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:25:54,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-04 14:25:54,721 INFO L175 Difference]: Start difference. First operand has 241 places, 282 transitions, 2925 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:25:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 299 transitions, 3547 flow [2024-06-04 14:25:55,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 299 transitions, 3425 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:25:55,325 INFO L231 Difference]: Finished difference. Result has 242 places, 282 transitions, 2889 flow [2024-06-04 14:25:55,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2889, PETRI_PLACES=242, PETRI_TRANSITIONS=282} [2024-06-04 14:25:55,326 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-04 14:25:55,326 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 282 transitions, 2889 flow [2024-06-04 14:25:55,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:55,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:55,327 INFO 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 14:25:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:25:55,327 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 14:25:55,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1802106731, now seen corresponding path program 8 times [2024-06-04 14:25:55,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:55,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047539218] [2024-06-04 14:25:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:55,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047539218] [2024-06-04 14:25:55,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047539218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:55,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:55,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:55,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624260887] [2024-06-04 14:25:55,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:55,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:55,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:55,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:55,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 282 transitions, 2889 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:55,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:55,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:55,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:55,864 INFO L124 PetriNetUnfolderBase]: 1781/3162 cut-off events. [2024-06-04 14:25:55,864 INFO L125 PetriNetUnfolderBase]: For 215918/215918 co-relation queries the response was YES. [2024-06-04 14:25:55,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20471 conditions, 3162 events. 1781/3162 cut-off events. For 215918/215918 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20240 event pairs, 409 based on Foata normal form. 1/3156 useless extension candidates. Maximal degree in co-relation 20367. Up to 2624 conditions per place. [2024-06-04 14:25:55,895 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 210 selfloop transitions, 86 changer transitions 0/305 dead transitions. [2024-06-04 14:25:55,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 305 transitions, 3905 flow [2024-06-04 14:25:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:25:55,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:25:55,896 INFO L175 Difference]: Start difference. First operand has 242 places, 282 transitions, 2889 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:25:55,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 305 transitions, 3905 flow [2024-06-04 14:25:56,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 305 transitions, 3825 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 14:25:56,670 INFO L231 Difference]: Finished difference. Result has 243 places, 289 transitions, 3105 flow [2024-06-04 14:25:56,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3105, PETRI_PLACES=243, PETRI_TRANSITIONS=289} [2024-06-04 14:25:56,670 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-04 14:25:56,670 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 289 transitions, 3105 flow [2024-06-04 14:25:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:56,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:56,671 INFO 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 14:25:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:25:56,671 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 14:25:56,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1810677611, now seen corresponding path program 9 times [2024-06-04 14:25:56,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:56,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587788688] [2024-06-04 14:25:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:56,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587788688] [2024-06-04 14:25:56,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587788688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:56,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:56,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:56,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930268147] [2024-06-04 14:25:56,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:56,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:56,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:56,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:56,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 289 transitions, 3105 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:56,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:56,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:56,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:57,207 INFO L124 PetriNetUnfolderBase]: 1778/3158 cut-off events. [2024-06-04 14:25:57,208 INFO L125 PetriNetUnfolderBase]: For 219899/219899 co-relation queries the response was YES. [2024-06-04 14:25:57,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20557 conditions, 3158 events. 1778/3158 cut-off events. For 219899/219899 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20216 event pairs, 409 based on Foata normal form. 1/3152 useless extension candidates. Maximal degree in co-relation 20452. Up to 2621 conditions per place. [2024-06-04 14:25:57,239 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 210 selfloop transitions, 85 changer transitions 0/304 dead transitions. [2024-06-04 14:25:57,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 304 transitions, 3867 flow [2024-06-04 14:25:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:25:57,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:25:57,240 INFO L175 Difference]: Start difference. First operand has 243 places, 289 transitions, 3105 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:25:57,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 304 transitions, 3867 flow [2024-06-04 14:25:57,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 304 transitions, 3648 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:57,846 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 3062 flow [2024-06-04 14:25:57,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3062, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-04 14:25:57,846 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-04 14:25:57,846 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 3062 flow [2024-06-04 14:25:57,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:57,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:57,847 INFO 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 14:25:57,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:25:57,847 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 14:25:57,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:57,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1738282059, now seen corresponding path program 4 times [2024-06-04 14:25:57,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:57,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597991006] [2024-06-04 14:25:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:57,954 INFO 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 14:25:57,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:57,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597991006] [2024-06-04 14:25:57,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597991006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:57,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:57,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:57,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174031398] [2024-06-04 14:25:57,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:57,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:57,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:57,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:57,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:57,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:57,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 3062 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:57,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:57,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:57,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:58,368 INFO L124 PetriNetUnfolderBase]: 1775/3152 cut-off events. [2024-06-04 14:25:58,368 INFO L125 PetriNetUnfolderBase]: For 223624/223624 co-relation queries the response was YES. [2024-06-04 14:25:58,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20463 conditions, 3152 events. 1775/3152 cut-off events. For 223624/223624 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20181 event pairs, 413 based on Foata normal form. 1/3144 useless extension candidates. Maximal degree in co-relation 20359. Up to 2649 conditions per place. [2024-06-04 14:25:58,398 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 234 selfloop transitions, 67 changer transitions 0/310 dead transitions. [2024-06-04 14:25:58,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 310 transitions, 4025 flow [2024-06-04 14:25:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:25:58,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-04 14:25:58,400 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 3062 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:25:58,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 310 transitions, 4025 flow [2024-06-04 14:25:58,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 310 transitions, 3869 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:58,889 INFO L231 Difference]: Finished difference. Result has 248 places, 291 transitions, 3085 flow [2024-06-04 14:25:58,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=248, PETRI_TRANSITIONS=291} [2024-06-04 14:25:58,890 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-04 14:25:58,890 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 291 transitions, 3085 flow [2024-06-04 14:25:58,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:58,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:58,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:25:58,891 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 14:25:58,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1810670667, now seen corresponding path program 5 times [2024-06-04 14:25:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:58,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775280157] [2024-06-04 14:25:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:58,998 INFO 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 14:25:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:58,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775280157] [2024-06-04 14:25:58,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775280157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:58,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:58,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359350364] [2024-06-04 14:25:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:59,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:25:59,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 291 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:59,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:59,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:25:59,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:59,426 INFO L124 PetriNetUnfolderBase]: 1788/3174 cut-off events. [2024-06-04 14:25:59,426 INFO L125 PetriNetUnfolderBase]: For 232186/232186 co-relation queries the response was YES. [2024-06-04 14:25:59,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20730 conditions, 3174 events. 1788/3174 cut-off events. For 232186/232186 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20352 event pairs, 413 based on Foata normal form. 1/3166 useless extension candidates. Maximal degree in co-relation 20625. Up to 2664 conditions per place. [2024-06-04 14:25:59,456 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 232 selfloop transitions, 72 changer transitions 0/313 dead transitions. [2024-06-04 14:25:59,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 313 transitions, 4115 flow [2024-06-04 14:25:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 14:25:59,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-04 14:25:59,457 INFO L175 Difference]: Start difference. First operand has 248 places, 291 transitions, 3085 flow. Second operand 7 states and 177 transitions. [2024-06-04 14:25:59,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 313 transitions, 4115 flow [2024-06-04 14:26:00,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 313 transitions, 3995 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:00,134 INFO L231 Difference]: Finished difference. Result has 252 places, 297 transitions, 3219 flow [2024-06-04 14:26:00,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3219, PETRI_PLACES=252, PETRI_TRANSITIONS=297} [2024-06-04 14:26:00,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-04 14:26:00,134 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 297 transitions, 3219 flow [2024-06-04 14:26:00,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:00,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:00,135 INFO 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 14:26:00,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:26:00,135 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 14:26:00,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1795433547, now seen corresponding path program 6 times [2024-06-04 14:26:00,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:00,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419392063] [2024-06-04 14:26:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:00,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:00,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419392063] [2024-06-04 14:26:00,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419392063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:00,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:00,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:00,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055181385] [2024-06-04 14:26:00,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:00,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:00,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:00,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:00,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 297 transitions, 3219 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:00,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:00,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:00,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:00,716 INFO L124 PetriNetUnfolderBase]: 1785/3177 cut-off events. [2024-06-04 14:26:00,716 INFO L125 PetriNetUnfolderBase]: For 235872/235872 co-relation queries the response was YES. [2024-06-04 14:26:00,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20711 conditions, 3177 events. 1785/3177 cut-off events. For 235872/235872 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20390 event pairs, 401 based on Foata normal form. 1/3174 useless extension candidates. Maximal degree in co-relation 20604. Up to 2756 conditions per place. [2024-06-04 14:26:00,746 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 277 selfloop transitions, 25 changer transitions 0/311 dead transitions. [2024-06-04 14:26:00,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 311 transitions, 3857 flow [2024-06-04 14:26:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:26:00,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-04 14:26:00,748 INFO L175 Difference]: Start difference. First operand has 252 places, 297 transitions, 3219 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:26:00,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 311 transitions, 3857 flow [2024-06-04 14:26:01,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 311 transitions, 3719 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:01,578 INFO L231 Difference]: Finished difference. Result has 256 places, 297 transitions, 3137 flow [2024-06-04 14:26:01,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3137, PETRI_PLACES=256, PETRI_TRANSITIONS=297} [2024-06-04 14:26:01,579 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-04 14:26:01,579 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 297 transitions, 3137 flow [2024-06-04 14:26:01,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:01,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:01,579 INFO 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 14:26:01,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:26:01,580 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 14:26:01,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash -437660745, now seen corresponding path program 10 times [2024-06-04 14:26:01,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:01,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370104777] [2024-06-04 14:26:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:01,687 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 14:26:01,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:01,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370104777] [2024-06-04 14:26:01,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370104777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:01,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:01,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195608272] [2024-06-04 14:26:01,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:01,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:01,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:01,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:01,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:01,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 297 transitions, 3137 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:01,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:01,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:01,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:02,116 INFO L124 PetriNetUnfolderBase]: 1790/3170 cut-off events. [2024-06-04 14:26:02,116 INFO L125 PetriNetUnfolderBase]: For 242703/242703 co-relation queries the response was YES. [2024-06-04 14:26:02,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20714 conditions, 3170 events. 1790/3170 cut-off events. For 242703/242703 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20366 event pairs, 434 based on Foata normal form. 1/3158 useless extension candidates. Maximal degree in co-relation 20606. Up to 2637 conditions per place. [2024-06-04 14:26:02,146 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 217 selfloop transitions, 87 changer transitions 0/313 dead transitions. [2024-06-04 14:26:02,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 313 transitions, 4113 flow [2024-06-04 14:26:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 14:26:02,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-04 14:26:02,148 INFO L175 Difference]: Start difference. First operand has 256 places, 297 transitions, 3137 flow. Second operand 7 states and 174 transitions. [2024-06-04 14:26:02,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 313 transitions, 4113 flow [2024-06-04 14:26:02,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 313 transitions, 4013 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 14:26:02,985 INFO L231 Difference]: Finished difference. Result has 256 places, 300 transitions, 3267 flow [2024-06-04 14:26:02,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3267, PETRI_PLACES=256, PETRI_TRANSITIONS=300} [2024-06-04 14:26:02,986 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-04 14:26:02,986 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 300 transitions, 3267 flow [2024-06-04 14:26:02,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:02,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:02,986 INFO 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 14:26:02,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:26:02,987 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 14:26:02,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 515448281, now seen corresponding path program 11 times [2024-06-04 14:26:02,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:02,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010325362] [2024-06-04 14:26:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:02,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:03,094 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 14:26:03,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010325362] [2024-06-04 14:26:03,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010325362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:03,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:03,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:03,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096725293] [2024-06-04 14:26:03,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:03,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:03,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:03,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:03,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 300 transitions, 3267 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:03,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:03,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:03,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:03,554 INFO L124 PetriNetUnfolderBase]: 1787/3166 cut-off events. [2024-06-04 14:26:03,555 INFO L125 PetriNetUnfolderBase]: For 246611/246611 co-relation queries the response was YES. [2024-06-04 14:26:03,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20818 conditions, 3166 events. 1787/3166 cut-off events. For 246611/246611 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20343 event pairs, 434 based on Foata normal form. 1/3154 useless extension candidates. Maximal degree in co-relation 20709. Up to 2634 conditions per place. [2024-06-04 14:26:03,583 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 214 selfloop transitions, 89 changer transitions 0/312 dead transitions. [2024-06-04 14:26:03,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 312 transitions, 4047 flow [2024-06-04 14:26:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:26:03,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 14:26:03,584 INFO L175 Difference]: Start difference. First operand has 256 places, 300 transitions, 3267 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:26:03,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 312 transitions, 4047 flow [2024-06-04 14:26:04,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 312 transitions, 3763 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:04,558 INFO L231 Difference]: Finished difference. Result has 258 places, 300 transitions, 3167 flow [2024-06-04 14:26:04,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3167, PETRI_PLACES=258, PETRI_TRANSITIONS=300} [2024-06-04 14:26:04,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-04 14:26:04,559 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 300 transitions, 3167 flow [2024-06-04 14:26:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:04,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:04,559 INFO 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 14:26:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:26:04,560 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 14:26:04,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash -77610859, now seen corresponding path program 12 times [2024-06-04 14:26:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:04,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499883985] [2024-06-04 14:26:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:04,667 INFO 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 14:26:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499883985] [2024-06-04 14:26:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499883985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:04,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761523927] [2024-06-04 14:26:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:04,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:04,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:04,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 300 transitions, 3167 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:04,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:04,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:04,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:05,080 INFO L124 PetriNetUnfolderBase]: 1784/3162 cut-off events. [2024-06-04 14:26:05,080 INFO L125 PetriNetUnfolderBase]: For 248980/248980 co-relation queries the response was YES. [2024-06-04 14:26:05,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20722 conditions, 3162 events. 1784/3162 cut-off events. For 248980/248980 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20293 event pairs, 434 based on Foata normal form. 1/3150 useless extension candidates. Maximal degree in co-relation 20612. Up to 2631 conditions per place. [2024-06-04 14:26:05,110 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 213 selfloop transitions, 89 changer transitions 0/311 dead transitions. [2024-06-04 14:26:05,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 311 transitions, 3797 flow [2024-06-04 14:26:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:26:05,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-04 14:26:05,111 INFO L175 Difference]: Start difference. First operand has 258 places, 300 transitions, 3167 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:26:05,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 311 transitions, 3797 flow [2024-06-04 14:26:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 311 transitions, 3579 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:05,945 INFO L231 Difference]: Finished difference. Result has 259 places, 300 transitions, 3133 flow [2024-06-04 14:26:05,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3133, PETRI_PLACES=259, PETRI_TRANSITIONS=300} [2024-06-04 14:26:05,946 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-04 14:26:05,946 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 300 transitions, 3133 flow [2024-06-04 14:26:05,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:05,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:05,946 INFO 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 14:26:05,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:26:05,946 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 14:26:05,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash -70937675, now seen corresponding path program 7 times [2024-06-04 14:26:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:05,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006855550] [2024-06-04 14:26:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:05,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:06,064 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 14:26:06,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:06,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006855550] [2024-06-04 14:26:06,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006855550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:06,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:06,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:06,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42251650] [2024-06-04 14:26:06,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:06,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:06,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:06,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:06,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:06,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 300 transitions, 3133 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:06,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:06,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:06,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:06,534 INFO L124 PetriNetUnfolderBase]: 1794/3195 cut-off events. [2024-06-04 14:26:06,534 INFO L125 PetriNetUnfolderBase]: For 254563/254563 co-relation queries the response was YES. [2024-06-04 14:26:06,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20885 conditions, 3195 events. 1794/3195 cut-off events. For 254563/254563 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20610 event pairs, 403 based on Foata normal form. 1/3192 useless extension candidates. Maximal degree in co-relation 20774. Up to 2768 conditions per place. [2024-06-04 14:26:06,567 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 280 selfloop transitions, 28 changer transitions 0/317 dead transitions. [2024-06-04 14:26:06,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 317 transitions, 3856 flow [2024-06-04 14:26:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:26:06,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-04 14:26:06,569 INFO L175 Difference]: Start difference. First operand has 259 places, 300 transitions, 3133 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:26:06,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 317 transitions, 3856 flow [2024-06-04 14:26:07,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 317 transitions, 3680 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:07,280 INFO L231 Difference]: Finished difference. Result has 261 places, 306 transitions, 3106 flow [2024-06-04 14:26:07,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3106, PETRI_PLACES=261, PETRI_TRANSITIONS=306} [2024-06-04 14:26:07,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-04 14:26:07,281 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 306 transitions, 3106 flow [2024-06-04 14:26:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:07,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:07,281 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 14:26:07,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:26:07,281 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 14:26:07,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash -86174795, now seen corresponding path program 8 times [2024-06-04 14:26:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:07,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385531816] [2024-06-04 14:26:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:07,389 INFO 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 14:26:07,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385531816] [2024-06-04 14:26:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385531816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:07,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:07,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:07,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869725331] [2024-06-04 14:26:07,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:07,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:07,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:07,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:07,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 306 transitions, 3106 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:07,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:07,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:07,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:07,834 INFO L124 PetriNetUnfolderBase]: 1799/3195 cut-off events. [2024-06-04 14:26:07,834 INFO L125 PetriNetUnfolderBase]: For 261105/261105 co-relation queries the response was YES. [2024-06-04 14:26:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20889 conditions, 3195 events. 1799/3195 cut-off events. For 261105/261105 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20607 event pairs, 418 based on Foata normal form. 1/3187 useless extension candidates. Maximal degree in co-relation 20777. Up to 2676 conditions per place. [2024-06-04 14:26:07,869 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 232 selfloop transitions, 81 changer transitions 0/322 dead transitions. [2024-06-04 14:26:07,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 322 transitions, 4122 flow [2024-06-04 14:26:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:26:07,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-04 14:26:07,870 INFO L175 Difference]: Start difference. First operand has 261 places, 306 transitions, 3106 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:26:07,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 322 transitions, 4122 flow [2024-06-04 14:26:08,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 322 transitions, 4042 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:08,751 INFO L231 Difference]: Finished difference. Result has 264 places, 309 transitions, 3250 flow [2024-06-04 14:26:08,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=264, PETRI_TRANSITIONS=309} [2024-06-04 14:26:08,751 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-04 14:26:08,751 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 309 transitions, 3250 flow [2024-06-04 14:26:08,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:08,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:08,752 INFO 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 14:26:08,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:26:08,752 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 14:26:08,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1850741851, now seen corresponding path program 9 times [2024-06-04 14:26:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:08,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110143705] [2024-06-04 14:26:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:08,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:08,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110143705] [2024-06-04 14:26:08,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110143705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:08,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:08,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334537561] [2024-06-04 14:26:08,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:08,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:08,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:08,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:08,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 309 transitions, 3250 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:08,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:08,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:08,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:09,310 INFO L124 PetriNetUnfolderBase]: 1804/3204 cut-off events. [2024-06-04 14:26:09,311 INFO L125 PetriNetUnfolderBase]: For 268055/268055 co-relation queries the response was YES. [2024-06-04 14:26:09,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21129 conditions, 3204 events. 1804/3204 cut-off events. For 268055/268055 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20649 event pairs, 418 based on Foata normal form. 1/3196 useless extension candidates. Maximal degree in co-relation 21016. Up to 2682 conditions per place. [2024-06-04 14:26:09,344 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 232 selfloop transitions, 84 changer transitions 0/325 dead transitions. [2024-06-04 14:26:09,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 325 transitions, 4268 flow [2024-06-04 14:26:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:26:09,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-04 14:26:09,345 INFO L175 Difference]: Start difference. First operand has 264 places, 309 transitions, 3250 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:26:09,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 325 transitions, 4268 flow [2024-06-04 14:26:10,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 325 transitions, 4069 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:10,497 INFO L231 Difference]: Finished difference. Result has 267 places, 312 transitions, 3273 flow [2024-06-04 14:26:10,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3273, PETRI_PLACES=267, PETRI_TRANSITIONS=312} [2024-06-04 14:26:10,497 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-04 14:26:10,497 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 312 transitions, 3273 flow [2024-06-04 14:26:10,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:10,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:10,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:10,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:26:10,498 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 14:26:10,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:10,498 INFO L85 PathProgramCache]: Analyzing trace with hash 325475735, now seen corresponding path program 10 times [2024-06-04 14:26:10,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839498858] [2024-06-04 14:26:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:10,620 INFO 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 14:26:10,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:10,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839498858] [2024-06-04 14:26:10,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839498858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:10,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:10,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:10,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699521221] [2024-06-04 14:26:10,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:10,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:10,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:10,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:10,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:10,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 312 transitions, 3273 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:10,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:10,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:10,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:11,154 INFO L124 PetriNetUnfolderBase]: 1809/3213 cut-off events. [2024-06-04 14:26:11,154 INFO L125 PetriNetUnfolderBase]: For 274193/274193 co-relation queries the response was YES. [2024-06-04 14:26:11,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21216 conditions, 3213 events. 1809/3213 cut-off events. For 274193/274193 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20737 event pairs, 418 based on Foata normal form. 1/3205 useless extension candidates. Maximal degree in co-relation 21102. Up to 2688 conditions per place. [2024-06-04 14:26:11,193 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 230 selfloop transitions, 89 changer transitions 0/328 dead transitions. [2024-06-04 14:26:11,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 328 transitions, 4155 flow [2024-06-04 14:26:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:26:11,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 14:26:11,194 INFO L175 Difference]: Start difference. First operand has 267 places, 312 transitions, 3273 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:26:11,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 328 transitions, 4155 flow [2024-06-04 14:26:12,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 328 transitions, 3893 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:12,070 INFO L231 Difference]: Finished difference. Result has 268 places, 316 transitions, 3255 flow [2024-06-04 14:26:12,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3255, PETRI_PLACES=268, PETRI_TRANSITIONS=316} [2024-06-04 14:26:12,070 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-04 14:26:12,071 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 316 transitions, 3255 flow [2024-06-04 14:26:12,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:12,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:12,071 INFO 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 14:26:12,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:26:12,071 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 14:26:12,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash 988282105, now seen corresponding path program 11 times [2024-06-04 14:26:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:12,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246393258] [2024-06-04 14:26:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:12,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:12,185 INFO 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 14:26:12,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246393258] [2024-06-04 14:26:12,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246393258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:12,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:12,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:12,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206369102] [2024-06-04 14:26:12,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:12,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:12,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:12,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:12,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:12,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 316 transitions, 3255 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:12,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:12,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:12,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:12,676 INFO L124 PetriNetUnfolderBase]: 1806/3218 cut-off events. [2024-06-04 14:26:12,676 INFO L125 PetriNetUnfolderBase]: For 276821/276821 co-relation queries the response was YES. [2024-06-04 14:26:12,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21152 conditions, 3218 events. 1806/3218 cut-off events. For 276821/276821 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20764 event pairs, 403 based on Foata normal form. 1/3215 useless extension candidates. Maximal degree in co-relation 21037. Up to 2772 conditions per place. [2024-06-04 14:26:12,712 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 280 selfloop transitions, 41 changer transitions 0/330 dead transitions. [2024-06-04 14:26:12,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 330 transitions, 4087 flow [2024-06-04 14:26:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:26:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:26:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 14:26:12,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2024-06-04 14:26:12,713 INFO L175 Difference]: Start difference. First operand has 268 places, 316 transitions, 3255 flow. Second operand 9 states and 208 transitions. [2024-06-04 14:26:12,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 330 transitions, 4087 flow [2024-06-04 14:26:13,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 330 transitions, 3921 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:13,576 INFO L231 Difference]: Finished difference. Result has 274 places, 316 transitions, 3177 flow [2024-06-04 14:26:13,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3177, PETRI_PLACES=274, PETRI_TRANSITIONS=316} [2024-06-04 14:26:13,576 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-04 14:26:13,576 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 316 transitions, 3177 flow [2024-06-04 14:26:13,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:13,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:13,577 INFO 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 14:26:13,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:26:13,577 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 14:26:13,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash -430922827, now seen corresponding path program 12 times [2024-06-04 14:26:13,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:13,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297559030] [2024-06-04 14:26:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:13,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:13,689 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 14:26:13,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:13,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297559030] [2024-06-04 14:26:13,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297559030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:13,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:13,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:13,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965393339] [2024-06-04 14:26:13,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:13,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:13,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:13,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:13,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 316 transitions, 3177 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:13,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:13,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:13,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:14,190 INFO L124 PetriNetUnfolderBase]: 1803/3214 cut-off events. [2024-06-04 14:26:14,190 INFO L125 PetriNetUnfolderBase]: For 279983/279983 co-relation queries the response was YES. [2024-06-04 14:26:14,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21016 conditions, 3214 events. 1803/3214 cut-off events. For 279983/279983 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20743 event pairs, 403 based on Foata normal form. 1/3211 useless extension candidates. Maximal degree in co-relation 20900. Up to 2769 conditions per place. [2024-06-04 14:26:14,221 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 278 selfloop transitions, 40 changer transitions 0/327 dead transitions. [2024-06-04 14:26:14,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 327 transitions, 3839 flow [2024-06-04 14:26:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:26:14,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-04 14:26:14,222 INFO L175 Difference]: Start difference. First operand has 274 places, 316 transitions, 3177 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:26:14,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 327 transitions, 3839 flow [2024-06-04 14:26:14,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 327 transitions, 3643 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-04 14:26:14,948 INFO L231 Difference]: Finished difference. Result has 272 places, 316 transitions, 3067 flow [2024-06-04 14:26:14,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3067, PETRI_PLACES=272, PETRI_TRANSITIONS=316} [2024-06-04 14:26:14,949 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-04 14:26:14,949 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 316 transitions, 3067 flow [2024-06-04 14:26:14,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:14,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:14,949 INFO 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 14:26:14,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:26:14,949 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 14:26:14,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2106084949, now seen corresponding path program 2 times [2024-06-04 14:26:14,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:14,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894717760] [2024-06-04 14:26:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:14,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:15,071 INFO 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 14:26:15,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:15,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894717760] [2024-06-04 14:26:15,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894717760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:15,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:15,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:15,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707507637] [2024-06-04 14:26:15,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:15,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:15,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:15,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:15,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:26:15,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 316 transitions, 3067 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:15,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:15,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:26:15,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:15,542 INFO L124 PetriNetUnfolderBase]: 1733/3119 cut-off events. [2024-06-04 14:26:15,542 INFO L125 PetriNetUnfolderBase]: For 315176/315176 co-relation queries the response was YES. [2024-06-04 14:26:15,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20652 conditions, 3119 events. 1733/3119 cut-off events. For 315176/315176 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20410 event pairs, 392 based on Foata normal form. 10/3096 useless extension candidates. Maximal degree in co-relation 20537. Up to 2496 conditions per place. [2024-06-04 14:26:15,576 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 238 selfloop transitions, 39 changer transitions 0/332 dead transitions. [2024-06-04 14:26:15,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 332 transitions, 3699 flow [2024-06-04 14:26:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:26:15,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:26:15,577 INFO L175 Difference]: Start difference. First operand has 272 places, 316 transitions, 3067 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:26:15,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 332 transitions, 3699 flow [2024-06-04 14:26:16,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 332 transitions, 3619 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:16,480 INFO L231 Difference]: Finished difference. Result has 273 places, 317 transitions, 3093 flow [2024-06-04 14:26:16,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3093, PETRI_PLACES=273, PETRI_TRANSITIONS=317} [2024-06-04 14:26:16,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-04 14:26:16,481 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 317 transitions, 3093 flow [2024-06-04 14:26:16,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:16,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:16,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:16,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:26:16,482 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 14:26:16,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash -430911915, now seen corresponding path program 3 times [2024-06-04 14:26:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:16,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441063109] [2024-06-04 14:26:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:16,610 INFO 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 14:26:16,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:16,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441063109] [2024-06-04 14:26:16,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441063109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:16,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:16,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:16,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077771584] [2024-06-04 14:26:16,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:16,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:16,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:16,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:26:16,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 317 transitions, 3093 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:16,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:16,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:26:16,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:17,111 INFO L124 PetriNetUnfolderBase]: 1762/3188 cut-off events. [2024-06-04 14:26:17,112 INFO L125 PetriNetUnfolderBase]: For 323570/323570 co-relation queries the response was YES. [2024-06-04 14:26:17,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21191 conditions, 3188 events. 1762/3188 cut-off events. For 323570/323570 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20946 event pairs, 391 based on Foata normal form. 9/3169 useless extension candidates. Maximal degree in co-relation 21075. Up to 2582 conditions per place. [2024-06-04 14:26:17,147 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 262 selfloop transitions, 16 changer transitions 0/333 dead transitions. [2024-06-04 14:26:17,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 333 transitions, 3729 flow [2024-06-04 14:26:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:26:17,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-04 14:26:17,149 INFO L175 Difference]: Start difference. First operand has 273 places, 317 transitions, 3093 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:26:17,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 333 transitions, 3729 flow [2024-06-04 14:26:18,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 333 transitions, 3645 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:18,124 INFO L231 Difference]: Finished difference. Result has 275 places, 318 transitions, 3071 flow [2024-06-04 14:26:18,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=275, PETRI_TRANSITIONS=318} [2024-06-04 14:26:18,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-04 14:26:18,124 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 318 transitions, 3071 flow [2024-06-04 14:26:18,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:18,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:18,125 INFO 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 14:26:18,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:26:18,125 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 14:26:18,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -413770155, now seen corresponding path program 4 times [2024-06-04 14:26:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:18,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587149883] [2024-06-04 14:26:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:18,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:18,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:18,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587149883] [2024-06-04 14:26:18,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587149883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:18,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:18,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:18,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421904425] [2024-06-04 14:26:18,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:18,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:18,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:18,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:26:18,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 318 transitions, 3071 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:18,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:18,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:26:18,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:18,756 INFO L124 PetriNetUnfolderBase]: 1764/3200 cut-off events. [2024-06-04 14:26:18,757 INFO L125 PetriNetUnfolderBase]: For 310614/310614 co-relation queries the response was YES. [2024-06-04 14:26:18,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20886 conditions, 3200 events. 1764/3200 cut-off events. For 310614/310614 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21068 event pairs, 385 based on Foata normal form. 8/3183 useless extension candidates. Maximal degree in co-relation 20769. Up to 2560 conditions per place. [2024-06-04 14:26:18,794 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 264 selfloop transitions, 19 changer transitions 0/338 dead transitions. [2024-06-04 14:26:18,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 338 transitions, 3739 flow [2024-06-04 14:26:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 14:26:18,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-04 14:26:18,795 INFO L175 Difference]: Start difference. First operand has 275 places, 318 transitions, 3071 flow. Second operand 8 states and 194 transitions. [2024-06-04 14:26:18,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 338 transitions, 3739 flow [2024-06-04 14:26:19,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 338 transitions, 3699 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:19,908 INFO L231 Difference]: Finished difference. Result has 278 places, 319 transitions, 3099 flow [2024-06-04 14:26:19,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3099, PETRI_PLACES=278, PETRI_TRANSITIONS=319} [2024-06-04 14:26:19,909 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-04 14:26:19,909 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 319 transitions, 3099 flow [2024-06-04 14:26:19,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:19,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:19,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:19,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:26:19,910 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 14:26:19,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2085883083, now seen corresponding path program 1 times [2024-06-04 14:26:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548818297] [2024-06-04 14:26:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:20,041 INFO 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 14:26:20,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548818297] [2024-06-04 14:26:20,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548818297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:20,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:20,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:20,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604602552] [2024-06-04 14:26:20,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:20,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:20,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:20,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:26:20,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 319 transitions, 3099 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:20,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:20,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:26:20,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:20,581 INFO L124 PetriNetUnfolderBase]: 1890/3403 cut-off events. [2024-06-04 14:26:20,582 INFO L125 PetriNetUnfolderBase]: For 357100/357100 co-relation queries the response was YES. [2024-06-04 14:26:20,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22884 conditions, 3403 events. 1890/3403 cut-off events. For 357100/357100 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22464 event pairs, 386 based on Foata normal form. 8/3406 useless extension candidates. Maximal degree in co-relation 22766. Up to 2728 conditions per place. [2024-06-04 14:26:20,618 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 276 selfloop transitions, 19 changer transitions 0/350 dead transitions. [2024-06-04 14:26:20,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 350 transitions, 4001 flow [2024-06-04 14:26:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:26:20,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:26:20,619 INFO L175 Difference]: Start difference. First operand has 278 places, 319 transitions, 3099 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:26:20,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 350 transitions, 4001 flow [2024-06-04 14:26:21,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 350 transitions, 3949 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:21,609 INFO L231 Difference]: Finished difference. Result has 280 places, 321 transitions, 3127 flow [2024-06-04 14:26:21,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3127, PETRI_PLACES=280, PETRI_TRANSITIONS=321} [2024-06-04 14:26:21,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-04 14:26:21,610 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 321 transitions, 3127 flow [2024-06-04 14:26:21,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:21,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:21,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:21,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:26:21,611 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 14:26:21,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1941324209, now seen corresponding path program 2 times [2024-06-04 14:26:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:21,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683705025] [2024-06-04 14:26:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:21,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:21,743 INFO 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 14:26:21,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:21,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683705025] [2024-06-04 14:26:21,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683705025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:21,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:21,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493205800] [2024-06-04 14:26:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:21,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:26:21,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 321 transitions, 3127 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:21,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:21,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:26:21,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:22,272 INFO L124 PetriNetUnfolderBase]: 1868/3374 cut-off events. [2024-06-04 14:26:22,272 INFO L125 PetriNetUnfolderBase]: For 335514/335514 co-relation queries the response was YES. [2024-06-04 14:26:22,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21886 conditions, 3374 events. 1868/3374 cut-off events. For 335514/335514 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22325 event pairs, 401 based on Foata normal form. 9/3379 useless extension candidates. Maximal degree in co-relation 21767. Up to 2761 conditions per place. [2024-06-04 14:26:22,431 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 271 selfloop transitions, 16 changer transitions 0/342 dead transitions. [2024-06-04 14:26:22,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 342 transitions, 3779 flow [2024-06-04 14:26:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 14:26:22,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-04 14:26:22,433 INFO L175 Difference]: Start difference. First operand has 280 places, 321 transitions, 3127 flow. Second operand 7 states and 177 transitions. [2024-06-04 14:26:22,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 342 transitions, 3779 flow [2024-06-04 14:26:23,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 342 transitions, 3749 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:23,112 INFO L231 Difference]: Finished difference. Result has 283 places, 321 transitions, 3135 flow [2024-06-04 14:26:23,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3135, PETRI_PLACES=283, PETRI_TRANSITIONS=321} [2024-06-04 14:26:23,113 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-04 14:26:23,113 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 321 transitions, 3135 flow [2024-06-04 14:26:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:23,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:23,113 INFO 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 14:26:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:26:23,113 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 14:26:23,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1802095819, now seen corresponding path program 3 times [2024-06-04 14:26:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639755177] [2024-06-04 14:26:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:23,262 INFO 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 14:26:23,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:23,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639755177] [2024-06-04 14:26:23,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639755177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:23,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:23,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:23,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098247143] [2024-06-04 14:26:23,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:23,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:23,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:23,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:26:23,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 321 transitions, 3135 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:23,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:23,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:26:23,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:23,752 INFO L124 PetriNetUnfolderBase]: 1902/3427 cut-off events. [2024-06-04 14:26:23,752 INFO L125 PetriNetUnfolderBase]: For 343827/343827 co-relation queries the response was YES. [2024-06-04 14:26:23,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22301 conditions, 3427 events. 1902/3427 cut-off events. For 343827/343827 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22689 event pairs, 410 based on Foata normal form. 10/3430 useless extension candidates. Maximal degree in co-relation 22180. Up to 2784 conditions per place. [2024-06-04 14:26:23,789 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 246 selfloop transitions, 39 changer transitions 0/340 dead transitions. [2024-06-04 14:26:23,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 340 transitions, 3795 flow [2024-06-04 14:26:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:26:23,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-04 14:26:23,790 INFO L175 Difference]: Start difference. First operand has 283 places, 321 transitions, 3135 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:26:23,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 340 transitions, 3795 flow [2024-06-04 14:26:24,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 340 transitions, 3758 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:24,673 INFO L231 Difference]: Finished difference. Result has 284 places, 322 transitions, 3204 flow [2024-06-04 14:26:24,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3204, PETRI_PLACES=284, PETRI_TRANSITIONS=322} [2024-06-04 14:26:24,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-04 14:26:24,674 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 322 transitions, 3204 flow [2024-06-04 14:26:24,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:24,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:24,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:24,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:26:24,675 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 14:26:24,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:24,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1795415691, now seen corresponding path program 1 times [2024-06-04 14:26:24,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:24,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176870224] [2024-06-04 14:26:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:24,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:24,818 INFO 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 14:26:24,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:24,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176870224] [2024-06-04 14:26:24,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176870224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:24,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:24,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:24,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295014769] [2024-06-04 14:26:24,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:24,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:24,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:24,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:24,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:24,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:24,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 322 transitions, 3204 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:24,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:24,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:24,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:25,304 INFO L124 PetriNetUnfolderBase]: 1985/3519 cut-off events. [2024-06-04 14:26:25,304 INFO L125 PetriNetUnfolderBase]: For 320528/320528 co-relation queries the response was YES. [2024-06-04 14:26:25,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22953 conditions, 3519 events. 1985/3519 cut-off events. For 320528/320528 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22959 event pairs, 429 based on Foata normal form. 2/3517 useless extension candidates. Maximal degree in co-relation 22831. Up to 3064 conditions per place. [2024-06-04 14:26:25,343 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 303 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-04 14:26:25,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 339 transitions, 3934 flow [2024-06-04 14:26:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:26:25,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-04 14:26:25,344 INFO L175 Difference]: Start difference. First operand has 284 places, 322 transitions, 3204 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:26:25,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 339 transitions, 3934 flow [2024-06-04 14:26:26,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 339 transitions, 3852 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:26,184 INFO L231 Difference]: Finished difference. Result has 286 places, 324 transitions, 3219 flow [2024-06-04 14:26:26,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3219, PETRI_PLACES=286, PETRI_TRANSITIONS=324} [2024-06-04 14:26:26,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-04 14:26:26,184 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 324 transitions, 3219 flow [2024-06-04 14:26:26,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:26,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:26,185 INFO 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 14:26:26,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:26:26,185 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 14:26:26,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash -429078953, now seen corresponding path program 4 times [2024-06-04 14:26:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801899458] [2024-06-04 14:26:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:26,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:26,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801899458] [2024-06-04 14:26:26,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801899458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:26,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:26,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716956022] [2024-06-04 14:26:26,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:26,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-04 14:26:26,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 324 transitions, 3219 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:26,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:26,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-04 14:26:26,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:26,780 INFO L124 PetriNetUnfolderBase]: 1920/3456 cut-off events. [2024-06-04 14:26:26,780 INFO L125 PetriNetUnfolderBase]: For 344355/344355 co-relation queries the response was YES. [2024-06-04 14:26:26,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22427 conditions, 3456 events. 1920/3456 cut-off events. For 344355/344355 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22920 event pairs, 417 based on Foata normal form. 10/3458 useless extension candidates. Maximal degree in co-relation 22304. Up to 2816 conditions per place. [2024-06-04 14:26:26,818 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 245 selfloop transitions, 40 changer transitions 0/340 dead transitions. [2024-06-04 14:26:26,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 340 transitions, 3875 flow [2024-06-04 14:26:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:26:26,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:26:26,819 INFO L175 Difference]: Start difference. First operand has 286 places, 324 transitions, 3219 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:26:26,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 340 transitions, 3875 flow [2024-06-04 14:26:27,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 340 transitions, 3794 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:27,725 INFO L231 Difference]: Finished difference. Result has 288 places, 325 transitions, 3250 flow [2024-06-04 14:26:27,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=288, PETRI_TRANSITIONS=325} [2024-06-04 14:26:27,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-04 14:26:27,726 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 325 transitions, 3250 flow [2024-06-04 14:26:27,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:27,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:27,727 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 14:26:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:26:27,727 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 14:26:27,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -70919819, now seen corresponding path program 2 times [2024-06-04 14:26:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076496439] [2024-06-04 14:26:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:27,872 INFO 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 14:26:27,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:27,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076496439] [2024-06-04 14:26:27,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076496439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:27,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:27,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332013355] [2024-06-04 14:26:27,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:27,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:27,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:27,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:27,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:27,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 325 transitions, 3250 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:27,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:27,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:27,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:28,381 INFO L124 PetriNetUnfolderBase]: 2003/3550 cut-off events. [2024-06-04 14:26:28,381 INFO L125 PetriNetUnfolderBase]: For 319307/319307 co-relation queries the response was YES. [2024-06-04 14:26:28,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 3550 events. 2003/3550 cut-off events. For 319307/319307 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23163 event pairs, 435 based on Foata normal form. 2/3548 useless extension candidates. Maximal degree in co-relation 22900. Up to 3094 conditions per place. [2024-06-04 14:26:28,422 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 303 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-04 14:26:28,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 339 transitions, 3978 flow [2024-06-04 14:26:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:26:28,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-04 14:26:28,423 INFO L175 Difference]: Start difference. First operand has 288 places, 325 transitions, 3250 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:26:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 339 transitions, 3978 flow [2024-06-04 14:26:29,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 339 transitions, 3890 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:29,511 INFO L231 Difference]: Finished difference. Result has 290 places, 327 transitions, 3265 flow [2024-06-04 14:26:29,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3265, PETRI_PLACES=290, PETRI_TRANSITIONS=327} [2024-06-04 14:26:29,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-04 14:26:29,511 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 327 transitions, 3265 flow [2024-06-04 14:26:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:29,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:29,512 INFO 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 14:26:29,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:26:29,512 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 14:26:29,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 158768791, now seen corresponding path program 3 times [2024-06-04 14:26:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:29,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917673696] [2024-06-04 14:26:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:29,632 INFO 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 14:26:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917673696] [2024-06-04 14:26:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917673696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:29,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:29,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:29,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168145582] [2024-06-04 14:26:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:29,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:29,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:29,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:29,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 327 transitions, 3265 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:29,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:29,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:29,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:30,209 INFO L124 PetriNetUnfolderBase]: 2011/3564 cut-off events. [2024-06-04 14:26:30,209 INFO L125 PetriNetUnfolderBase]: For 326056/326056 co-relation queries the response was YES. [2024-06-04 14:26:30,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23165 conditions, 3564 events. 2011/3564 cut-off events. For 326056/326056 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23264 event pairs, 437 based on Foata normal form. 2/3562 useless extension candidates. Maximal degree in co-relation 23040. Up to 3106 conditions per place. [2024-06-04 14:26:30,246 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 304 selfloop transitions, 28 changer transitions 0/341 dead transitions. [2024-06-04 14:26:30,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 341 transitions, 4001 flow [2024-06-04 14:26:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:26:30,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-04 14:26:30,248 INFO L175 Difference]: Start difference. First operand has 290 places, 327 transitions, 3265 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:26:30,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 341 transitions, 4001 flow [2024-06-04 14:26:31,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 341 transitions, 3914 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:31,133 INFO L231 Difference]: Finished difference. Result has 292 places, 329 transitions, 3287 flow [2024-06-04 14:26:31,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3287, PETRI_PLACES=292, PETRI_TRANSITIONS=329} [2024-06-04 14:26:31,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-04 14:26:31,134 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 329 transitions, 3287 flow [2024-06-04 14:26:31,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:31,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:31,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:31,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:26:31,138 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 14:26:31,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -413763211, now seen corresponding path program 4 times [2024-06-04 14:26:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:31,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733616164] [2024-06-04 14:26:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733616164] [2024-06-04 14:26:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733616164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:31,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:31,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:26:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820207569] [2024-06-04 14:26:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:26:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:26:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:26:31,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:31,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 329 transitions, 3287 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:31,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:31,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:31,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:31,777 INFO L124 PetriNetUnfolderBase]: 2006/3557 cut-off events. [2024-06-04 14:26:31,778 INFO L125 PetriNetUnfolderBase]: For 324985/324985 co-relation queries the response was YES. [2024-06-04 14:26:31,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23049 conditions, 3557 events. 2006/3557 cut-off events. For 324985/324985 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23229 event pairs, 417 based on Foata normal form. 2/3555 useless extension candidates. Maximal degree in co-relation 22923. Up to 3073 conditions per place. [2024-06-04 14:26:31,819 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 300 selfloop transitions, 35 changer transitions 0/344 dead transitions. [2024-06-04 14:26:31,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 344 transitions, 4035 flow [2024-06-04 14:26:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:26:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:26:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:26:31,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-04 14:26:31,820 INFO L175 Difference]: Start difference. First operand has 292 places, 329 transitions, 3287 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:26:31,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 344 transitions, 4035 flow [2024-06-04 14:26:32,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 344 transitions, 3942 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:32,955 INFO L231 Difference]: Finished difference. Result has 294 places, 331 transitions, 3321 flow [2024-06-04 14:26:32,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3321, PETRI_PLACES=294, PETRI_TRANSITIONS=331} [2024-06-04 14:26:32,955 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-04 14:26:32,955 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 331 transitions, 3321 flow [2024-06-04 14:26:32,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:32,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:32,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:32,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:26:32,956 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 14:26:32,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 613354516, now seen corresponding path program 1 times [2024-06-04 14:26:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:32,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981782396] [2024-06-04 14:26:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:33,081 INFO 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 14:26:33,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981782396] [2024-06-04 14:26:33,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981782396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:33,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:33,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:33,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671345657] [2024-06-04 14:26:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:33,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:33,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:33,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 331 transitions, 3321 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:33,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:33,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:33,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:33,748 INFO L124 PetriNetUnfolderBase]: 2040/3613 cut-off events. [2024-06-04 14:26:33,748 INFO L125 PetriNetUnfolderBase]: For 347299/347299 co-relation queries the response was YES. [2024-06-04 14:26:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23893 conditions, 3613 events. 2040/3613 cut-off events. For 347299/347299 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23655 event pairs, 321 based on Foata normal form. 2/3612 useless extension candidates. Maximal degree in co-relation 23766. Up to 2969 conditions per place. [2024-06-04 14:26:33,790 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 55 changer transitions 0/378 dead transitions. [2024-06-04 14:26:33,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 378 transitions, 4653 flow [2024-06-04 14:26:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:26:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:26:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-04 14:26:33,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5883838383838383 [2024-06-04 14:26:33,792 INFO L175 Difference]: Start difference. First operand has 294 places, 331 transitions, 3321 flow. Second operand 9 states and 233 transitions. [2024-06-04 14:26:33,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 378 transitions, 4653 flow [2024-06-04 14:26:35,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 378 transitions, 4542 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:35,046 INFO L231 Difference]: Finished difference. Result has 299 places, 338 transitions, 3453 flow [2024-06-04 14:26:35,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3453, PETRI_PLACES=299, PETRI_TRANSITIONS=338} [2024-06-04 14:26:35,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-04 14:26:35,047 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 338 transitions, 3453 flow [2024-06-04 14:26:35,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:35,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:35,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:35,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:26:35,048 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 14:26:35,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1186968690, now seen corresponding path program 2 times [2024-06-04 14:26:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:35,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995236120] [2024-06-04 14:26:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995236120] [2024-06-04 14:26:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995236120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:35,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:35,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:35,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707669722] [2024-06-04 14:26:35,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:35,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:35,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:35,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 338 transitions, 3453 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:35,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:35,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:35,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:35,777 INFO L124 PetriNetUnfolderBase]: 2061/3652 cut-off events. [2024-06-04 14:26:35,777 INFO L125 PetriNetUnfolderBase]: For 364614/364614 co-relation queries the response was YES. [2024-06-04 14:26:35,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24588 conditions, 3652 events. 2061/3652 cut-off events. For 364614/364614 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23909 event pairs, 325 based on Foata normal form. 2/3651 useless extension candidates. Maximal degree in co-relation 24459. Up to 2989 conditions per place. [2024-06-04 14:26:35,824 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 313 selfloop transitions, 57 changer transitions 0/379 dead transitions. [2024-06-04 14:26:35,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 379 transitions, 4747 flow [2024-06-04 14:26:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:26:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:26:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-04 14:26:35,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5808080808080808 [2024-06-04 14:26:35,825 INFO L175 Difference]: Start difference. First operand has 299 places, 338 transitions, 3453 flow. Second operand 9 states and 230 transitions. [2024-06-04 14:26:35,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 379 transitions, 4747 flow [2024-06-04 14:26:37,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 379 transitions, 4589 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:37,157 INFO L231 Difference]: Finished difference. Result has 305 places, 343 transitions, 3529 flow [2024-06-04 14:26:37,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3529, PETRI_PLACES=305, PETRI_TRANSITIONS=343} [2024-06-04 14:26:37,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-04 14:26:37,158 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 343 transitions, 3529 flow [2024-06-04 14:26:37,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:37,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:37,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:37,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:26:37,159 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 14:26:37,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:37,159 INFO L85 PathProgramCache]: Analyzing trace with hash -936074220, now seen corresponding path program 3 times [2024-06-04 14:26:37,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:37,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677468757] [2024-06-04 14:26:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:37,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:37,302 INFO 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 14:26:37,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:37,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677468757] [2024-06-04 14:26:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677468757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:37,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:37,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:37,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041698604] [2024-06-04 14:26:37,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:37,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:37,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:37,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:37,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:37,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 343 transitions, 3529 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:37,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:37,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:37,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:37,996 INFO L124 PetriNetUnfolderBase]: 2056/3640 cut-off events. [2024-06-04 14:26:37,997 INFO L125 PetriNetUnfolderBase]: For 361822/361822 co-relation queries the response was YES. [2024-06-04 14:26:38,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24334 conditions, 3640 events. 2056/3640 cut-off events. For 361822/361822 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23916 event pairs, 410 based on Foata normal form. 2/3634 useless extension candidates. Maximal degree in co-relation 24202. Up to 3099 conditions per place. [2024-06-04 14:26:38,044 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 323 selfloop transitions, 44 changer transitions 0/376 dead transitions. [2024-06-04 14:26:38,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 376 transitions, 4533 flow [2024-06-04 14:26:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:26:38,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-04 14:26:38,045 INFO L175 Difference]: Start difference. First operand has 305 places, 343 transitions, 3529 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:26:38,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 376 transitions, 4533 flow [2024-06-04 14:26:39,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 376 transitions, 4424 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:39,634 INFO L231 Difference]: Finished difference. Result has 308 places, 343 transitions, 3513 flow [2024-06-04 14:26:39,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3513, PETRI_PLACES=308, PETRI_TRANSITIONS=343} [2024-06-04 14:26:39,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-04 14:26:39,635 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 343 transitions, 3513 flow [2024-06-04 14:26:39,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:39,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:39,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:39,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:26:39,636 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 14:26:39,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash 425729310, now seen corresponding path program 4 times [2024-06-04 14:26:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:39,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776697046] [2024-06-04 14:26:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:39,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:39,779 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 14:26:39,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776697046] [2024-06-04 14:26:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776697046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:39,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:39,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006335004] [2024-06-04 14:26:39,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:39,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:39,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 343 transitions, 3513 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:39,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:39,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:39,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:40,431 INFO L124 PetriNetUnfolderBase]: 2064/3657 cut-off events. [2024-06-04 14:26:40,431 INFO L125 PetriNetUnfolderBase]: For 369722/369722 co-relation queries the response was YES. [2024-06-04 14:26:40,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24421 conditions, 3657 events. 2064/3657 cut-off events. For 369722/369722 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24049 event pairs, 417 based on Foata normal form. 2/3656 useless extension candidates. Maximal degree in co-relation 24288. Up to 3146 conditions per place. [2024-06-04 14:26:40,478 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 322 selfloop transitions, 42 changer transitions 0/373 dead transitions. [2024-06-04 14:26:40,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 373 transitions, 4339 flow [2024-06-04 14:26:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:26:40,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-04 14:26:40,479 INFO L175 Difference]: Start difference. First operand has 308 places, 343 transitions, 3513 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:26:40,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 373 transitions, 4339 flow [2024-06-04 14:26:42,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 373 transitions, 4221 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:26:42,367 INFO L231 Difference]: Finished difference. Result has 309 places, 345 transitions, 3516 flow [2024-06-04 14:26:42,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3516, PETRI_PLACES=309, PETRI_TRANSITIONS=345} [2024-06-04 14:26:42,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-04 14:26:42,367 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 345 transitions, 3516 flow [2024-06-04 14:26:42,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:42,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:42,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:42,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:26:42,368 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 14:26:42,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:42,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1355804098, now seen corresponding path program 5 times [2024-06-04 14:26:42,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:42,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043421692] [2024-06-04 14:26:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:42,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:42,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:42,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043421692] [2024-06-04 14:26:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043421692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:42,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:42,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:42,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021163214] [2024-06-04 14:26:42,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:42,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:42,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:42,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:42,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 345 transitions, 3516 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:42,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:42,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:42,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:43,123 INFO L124 PetriNetUnfolderBase]: 2085/3692 cut-off events. [2024-06-04 14:26:43,123 INFO L125 PetriNetUnfolderBase]: For 386286/386286 co-relation queries the response was YES. [2024-06-04 14:26:43,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24828 conditions, 3692 events. 2085/3692 cut-off events. For 386286/386286 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24286 event pairs, 418 based on Foata normal form. 2/3691 useless extension candidates. Maximal degree in co-relation 24694. Up to 3154 conditions per place. [2024-06-04 14:26:43,166 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 323 selfloop transitions, 49 changer transitions 0/381 dead transitions. [2024-06-04 14:26:43,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 381 transitions, 4580 flow [2024-06-04 14:26:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:26:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:26:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 14:26:43,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-04 14:26:43,168 INFO L175 Difference]: Start difference. First operand has 309 places, 345 transitions, 3516 flow. Second operand 10 states and 244 transitions. [2024-06-04 14:26:43,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 381 transitions, 4580 flow [2024-06-04 14:26:45,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 381 transitions, 4489 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:45,123 INFO L231 Difference]: Finished difference. Result has 314 places, 349 transitions, 3595 flow [2024-06-04 14:26:45,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3595, PETRI_PLACES=314, PETRI_TRANSITIONS=349} [2024-06-04 14:26:45,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-04 14:26:45,124 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 349 transitions, 3595 flow [2024-06-04 14:26:45,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:45,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:45,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:45,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:26:45,124 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 14:26:45,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash 653630460, now seen corresponding path program 6 times [2024-06-04 14:26:45,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:45,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624014113] [2024-06-04 14:26:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:45,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:45,255 INFO 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 14:26:45,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:45,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624014113] [2024-06-04 14:26:45,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624014113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:45,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:45,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:45,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501642961] [2024-06-04 14:26:45,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:45,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:45,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:45,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:45,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:45,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 349 transitions, 3595 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:45,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:45,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:45,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:45,867 INFO L124 PetriNetUnfolderBase]: 2080/3685 cut-off events. [2024-06-04 14:26:45,867 INFO L125 PetriNetUnfolderBase]: For 384865/384865 co-relation queries the response was YES. [2024-06-04 14:26:45,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24762 conditions, 3685 events. 2080/3685 cut-off events. For 384865/384865 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24269 event pairs, 419 based on Foata normal form. 2/3684 useless extension candidates. Maximal degree in co-relation 24626. Up to 3170 conditions per place. [2024-06-04 14:26:45,909 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 327 selfloop transitions, 43 changer transitions 0/379 dead transitions. [2024-06-04 14:26:45,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 379 transitions, 4409 flow [2024-06-04 14:26:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:26:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:26:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-04 14:26:45,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-04 14:26:45,910 INFO L175 Difference]: Start difference. First operand has 314 places, 349 transitions, 3595 flow. Second operand 10 states and 242 transitions. [2024-06-04 14:26:45,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 379 transitions, 4409 flow [2024-06-04 14:26:47,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 379 transitions, 4303 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:26:47,894 INFO L231 Difference]: Finished difference. Result has 317 places, 349 transitions, 3580 flow [2024-06-04 14:26:47,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3580, PETRI_PLACES=317, PETRI_TRANSITIONS=349} [2024-06-04 14:26:47,895 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-04 14:26:47,895 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 349 transitions, 3580 flow [2024-06-04 14:26:47,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:47,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:47,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:47,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:26:47,896 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 14:26:47,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash -87737032, now seen corresponding path program 1 times [2024-06-04 14:26:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:47,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208369162] [2024-06-04 14:26:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:47,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:48,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208369162] [2024-06-04 14:26:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208369162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:48,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:48,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772035218] [2024-06-04 14:26:48,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:48,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:48,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:48,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 349 transitions, 3580 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:48,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:48,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:48,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:48,693 INFO L124 PetriNetUnfolderBase]: 2085/3695 cut-off events. [2024-06-04 14:26:48,693 INFO L125 PetriNetUnfolderBase]: For 387482/387482 co-relation queries the response was YES. [2024-06-04 14:26:48,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24852 conditions, 3695 events. 2085/3695 cut-off events. For 387482/387482 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24356 event pairs, 417 based on Foata normal form. 1/3694 useless extension candidates. Maximal degree in co-relation 24715. Up to 3201 conditions per place. [2024-06-04 14:26:48,737 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 19 changer transitions 0/382 dead transitions. [2024-06-04 14:26:48,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 382 transitions, 4450 flow [2024-06-04 14:26:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 14:26:48,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-04 14:26:48,739 INFO L175 Difference]: Start difference. First operand has 317 places, 349 transitions, 3580 flow. Second operand 8 states and 201 transitions. [2024-06-04 14:26:48,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 382 transitions, 4450 flow [2024-06-04 14:26:50,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 382 transitions, 4354 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:26:50,826 INFO L231 Difference]: Finished difference. Result has 316 places, 352 transitions, 3582 flow [2024-06-04 14:26:50,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3582, PETRI_PLACES=316, PETRI_TRANSITIONS=352} [2024-06-04 14:26:50,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-04 14:26:50,826 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 352 transitions, 3582 flow [2024-06-04 14:26:50,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:50,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:50,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:50,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:26:50,827 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 14:26:50,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash -87617062, now seen corresponding path program 2 times [2024-06-04 14:26:50,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:50,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326729179] [2024-06-04 14:26:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:50,963 INFO 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 14:26:50,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:50,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326729179] [2024-06-04 14:26:50,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326729179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:50,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:50,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:50,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067322862] [2024-06-04 14:26:50,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:50,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:50,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:51,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:51,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 352 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:51,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:51,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:51,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:51,545 INFO L124 PetriNetUnfolderBase]: 2098/3716 cut-off events. [2024-06-04 14:26:51,545 INFO L125 PetriNetUnfolderBase]: For 401239/401239 co-relation queries the response was YES. [2024-06-04 14:26:51,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25474 conditions, 3716 events. 2098/3716 cut-off events. For 401239/401239 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24581 event pairs, 418 based on Foata normal form. 1/3714 useless extension candidates. Maximal degree in co-relation 25336. Up to 3178 conditions per place. [2024-06-04 14:26:51,589 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 329 selfloop transitions, 48 changer transitions 0/386 dead transitions. [2024-06-04 14:26:51,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 386 transitions, 4712 flow [2024-06-04 14:26:51,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 14:26:51,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-04 14:26:51,590 INFO L175 Difference]: Start difference. First operand has 316 places, 352 transitions, 3582 flow. Second operand 8 states and 205 transitions. [2024-06-04 14:26:51,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 386 transitions, 4712 flow [2024-06-04 14:26:53,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 386 transitions, 4626 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:53,623 INFO L231 Difference]: Finished difference. Result has 318 places, 358 transitions, 3712 flow [2024-06-04 14:26:53,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3712, PETRI_PLACES=318, PETRI_TRANSITIONS=358} [2024-06-04 14:26:53,623 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-04 14:26:53,623 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 358 transitions, 3712 flow [2024-06-04 14:26:53,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:53,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:53,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:53,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:26:53,623 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 14:26:53,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1184743284, now seen corresponding path program 3 times [2024-06-04 14:26:53,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:53,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756862920] [2024-06-04 14:26:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:53,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:53,737 INFO 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 14:26:53,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756862920] [2024-06-04 14:26:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756862920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:53,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:53,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70481887] [2024-06-04 14:26:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:53,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:53,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 358 transitions, 3712 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:53,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:53,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:54,433 INFO L124 PetriNetUnfolderBase]: 2103/3725 cut-off events. [2024-06-04 14:26:54,433 INFO L125 PetriNetUnfolderBase]: For 411944/411944 co-relation queries the response was YES. [2024-06-04 14:26:54,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25981 conditions, 3725 events. 2103/3725 cut-off events. For 411944/411944 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24607 event pairs, 418 based on Foata normal form. 1/3723 useless extension candidates. Maximal degree in co-relation 25842. Up to 3184 conditions per place. [2024-06-04 14:26:54,472 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 52 changer transitions 0/391 dead transitions. [2024-06-04 14:26:54,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 391 transitions, 4810 flow [2024-06-04 14:26:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:26:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:26:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-04 14:26:54,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-04 14:26:54,475 INFO L175 Difference]: Start difference. First operand has 318 places, 358 transitions, 3712 flow. Second operand 10 states and 245 transitions. [2024-06-04 14:26:54,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 391 transitions, 4810 flow [2024-06-04 14:26:56,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 391 transitions, 4688 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-04 14:26:56,626 INFO L231 Difference]: Finished difference. Result has 324 places, 361 transitions, 3760 flow [2024-06-04 14:26:56,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3760, PETRI_PLACES=324, PETRI_TRANSITIONS=361} [2024-06-04 14:26:56,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-04 14:26:56,626 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 361 transitions, 3760 flow [2024-06-04 14:26:56,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:56,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:56,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:26:56,627 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 14:26:56,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:56,627 INFO L85 PathProgramCache]: Analyzing trace with hash -82968488, now seen corresponding path program 1 times [2024-06-04 14:26:56,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:56,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417205160] [2024-06-04 14:26:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:56,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:56,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417205160] [2024-06-04 14:26:56,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417205160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:56,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:56,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:56,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937840461] [2024-06-04 14:26:56,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:56,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:56,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:56,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:56,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:56,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:56,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 361 transitions, 3760 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:56,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:56,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:56,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:57,338 INFO L124 PetriNetUnfolderBase]: 2116/3746 cut-off events. [2024-06-04 14:26:57,338 INFO L125 PetriNetUnfolderBase]: For 424783/424783 co-relation queries the response was YES. [2024-06-04 14:26:57,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26348 conditions, 3746 events. 2116/3746 cut-off events. For 424783/424783 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24803 event pairs, 418 based on Foata normal form. 1/3743 useless extension candidates. Maximal degree in co-relation 26207. Up to 3182 conditions per place. [2024-06-04 14:26:57,389 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 58 changer transitions 0/395 dead transitions. [2024-06-04 14:26:57,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 395 transitions, 4912 flow [2024-06-04 14:26:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:26:57,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-04 14:26:57,390 INFO L175 Difference]: Start difference. First operand has 324 places, 361 transitions, 3760 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:26:57,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 395 transitions, 4912 flow [2024-06-04 14:26:59,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 395 transitions, 4776 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 14:26:59,711 INFO L231 Difference]: Finished difference. Result has 324 places, 367 transitions, 3860 flow [2024-06-04 14:26:59,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3860, PETRI_PLACES=324, PETRI_TRANSITIONS=367} [2024-06-04 14:26:59,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-04 14:26:59,712 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 367 transitions, 3860 flow [2024-06-04 14:26:59,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:59,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:59,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:59,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:26:59,712 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 14:26:59,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1503536784, now seen corresponding path program 2 times [2024-06-04 14:26:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:59,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431469178] [2024-06-04 14:26:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:59,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:59,839 INFO 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 14:26:59,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:59,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431469178] [2024-06-04 14:26:59,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431469178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:59,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:59,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130213466] [2024-06-04 14:26:59,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:59,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:26:59,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 367 transitions, 3860 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:59,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:59,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:26:59,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:00,548 INFO L124 PetriNetUnfolderBase]: 2134/3777 cut-off events. [2024-06-04 14:27:00,548 INFO L125 PetriNetUnfolderBase]: For 440299/440299 co-relation queries the response was YES. [2024-06-04 14:27:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27010 conditions, 3777 events. 2134/3777 cut-off events. For 440299/440299 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25029 event pairs, 418 based on Foata normal form. 1/3774 useless extension candidates. Maximal degree in co-relation 26868. Up to 3201 conditions per place. [2024-06-04 14:27:00,592 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 68 changer transitions 0/407 dead transitions. [2024-06-04 14:27:00,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 407 transitions, 5289 flow [2024-06-04 14:27:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:27:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:27:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-04 14:27:00,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-04 14:27:00,593 INFO L175 Difference]: Start difference. First operand has 324 places, 367 transitions, 3860 flow. Second operand 10 states and 251 transitions. [2024-06-04 14:27:00,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 407 transitions, 5289 flow [2024-06-04 14:27:03,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 407 transitions, 5033 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-04 14:27:03,146 INFO L231 Difference]: Finished difference. Result has 329 places, 376 transitions, 3895 flow [2024-06-04 14:27:03,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3895, PETRI_PLACES=329, PETRI_TRANSITIONS=376} [2024-06-04 14:27:03,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-04 14:27:03,147 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 376 transitions, 3895 flow [2024-06-04 14:27:03,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:03,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:03,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:03,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:27:03,148 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 14:27:03,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1512107664, now seen corresponding path program 3 times [2024-06-04 14:27:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:03,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233547511] [2024-06-04 14:27:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:03,273 INFO 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 14:27:03,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233547511] [2024-06-04 14:27:03,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233547511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:03,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:03,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294911957] [2024-06-04 14:27:03,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:03,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:03,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:03,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:03,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:03,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 376 transitions, 3895 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:03,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:03,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:03,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:03,927 INFO L124 PetriNetUnfolderBase]: 2131/3773 cut-off events. [2024-06-04 14:27:03,927 INFO L125 PetriNetUnfolderBase]: For 442481/442481 co-relation queries the response was YES. [2024-06-04 14:27:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26867 conditions, 3773 events. 2131/3773 cut-off events. For 442481/442481 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25022 event pairs, 418 based on Foata normal form. 1/3770 useless extension candidates. Maximal degree in co-relation 26725. Up to 3198 conditions per place. [2024-06-04 14:27:03,973 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 70 changer transitions 0/407 dead transitions. [2024-06-04 14:27:03,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 407 transitions, 4973 flow [2024-06-04 14:27:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:27:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:27:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-04 14:27:03,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516528925619835 [2024-06-04 14:27:03,975 INFO L175 Difference]: Start difference. First operand has 329 places, 376 transitions, 3895 flow. Second operand 11 states and 267 transitions. [2024-06-04 14:27:03,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 407 transitions, 4973 flow [2024-06-04 14:27:06,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 407 transitions, 4793 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:06,580 INFO L231 Difference]: Finished difference. Result has 334 places, 376 transitions, 3861 flow [2024-06-04 14:27:06,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3715, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3861, PETRI_PLACES=334, PETRI_TRANSITIONS=376} [2024-06-04 14:27:06,580 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-04 14:27:06,580 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 376 transitions, 3861 flow [2024-06-04 14:27:06,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:06,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:06,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:06,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:27:06,581 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 14:27:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 620029684, now seen corresponding path program 1 times [2024-06-04 14:27:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:06,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976049673] [2024-06-04 14:27:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:06,705 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 14:27:06,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:06,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976049673] [2024-06-04 14:27:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976049673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:06,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:06,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361614246] [2024-06-04 14:27:06,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:06,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:06,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:06,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 376 transitions, 3861 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:06,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:06,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:06,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:07,399 INFO L124 PetriNetUnfolderBase]: 2211/3913 cut-off events. [2024-06-04 14:27:07,399 INFO L125 PetriNetUnfolderBase]: For 478979/478979 co-relation queries the response was YES. [2024-06-04 14:27:07,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27640 conditions, 3913 events. 2211/3913 cut-off events. For 478979/478979 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 26011 event pairs, 358 based on Foata normal form. 6/3915 useless extension candidates. Maximal degree in co-relation 27497. Up to 3143 conditions per place. [2024-06-04 14:27:07,447 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 352 selfloop transitions, 55 changer transitions 0/416 dead transitions. [2024-06-04 14:27:07,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 416 transitions, 5077 flow [2024-06-04 14:27:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-04 14:27:07,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-06-04 14:27:07,448 INFO L175 Difference]: Start difference. First operand has 334 places, 376 transitions, 3861 flow. Second operand 8 states and 210 transitions. [2024-06-04 14:27:07,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 416 transitions, 5077 flow [2024-06-04 14:27:10,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 416 transitions, 4923 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 14:27:10,178 INFO L231 Difference]: Finished difference. Result has 333 places, 380 transitions, 3910 flow [2024-06-04 14:27:10,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3910, PETRI_PLACES=333, PETRI_TRANSITIONS=380} [2024-06-04 14:27:10,179 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-04 14:27:10,179 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 380 transitions, 3910 flow [2024-06-04 14:27:10,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:10,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:10,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:10,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:27:10,179 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 14:27:10,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1181890292, now seen corresponding path program 2 times [2024-06-04 14:27:10,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:10,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426593273] [2024-06-04 14:27:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:10,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:10,314 INFO 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 14:27:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426593273] [2024-06-04 14:27:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426593273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:10,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:10,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:10,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189802081] [2024-06-04 14:27:10,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:10,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:10,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:10,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:10,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 380 transitions, 3910 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:10,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:10,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:10,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:11,016 INFO L124 PetriNetUnfolderBase]: 2259/3991 cut-off events. [2024-06-04 14:27:11,017 INFO L125 PetriNetUnfolderBase]: For 489936/489936 co-relation queries the response was YES. [2024-06-04 14:27:11,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28437 conditions, 3991 events. 2259/3991 cut-off events. For 489936/489936 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26616 event pairs, 442 based on Foata normal form. 6/3993 useless extension candidates. Maximal degree in co-relation 28292. Up to 3382 conditions per place. [2024-06-04 14:27:11,073 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 356 selfloop transitions, 48 changer transitions 0/413 dead transitions. [2024-06-04 14:27:11,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 413 transitions, 4882 flow [2024-06-04 14:27:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:27:11,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:27:11,075 INFO L175 Difference]: Start difference. First operand has 333 places, 380 transitions, 3910 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:27:11,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 413 transitions, 4882 flow [2024-06-04 14:27:13,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 413 transitions, 4773 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:27:13,936 INFO L231 Difference]: Finished difference. Result has 337 places, 382 transitions, 3955 flow [2024-06-04 14:27:13,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3955, PETRI_PLACES=337, PETRI_TRANSITIONS=382} [2024-06-04 14:27:13,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-04 14:27:13,936 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 382 transitions, 3955 flow [2024-06-04 14:27:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:13,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:13,937 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, 1, 1] [2024-06-04 14:27:13,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:27:13,937 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 14:27:13,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -701421096, now seen corresponding path program 7 times [2024-06-04 14:27:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247274422] [2024-06-04 14:27:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:14,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247274422] [2024-06-04 14:27:14,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247274422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:14,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:14,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:14,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161398476] [2024-06-04 14:27:14,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:14,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:14,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:14,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:14,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 382 transitions, 3955 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:14,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:14,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:14,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:14,799 INFO L124 PetriNetUnfolderBase]: 2280/4020 cut-off events. [2024-06-04 14:27:14,800 INFO L125 PetriNetUnfolderBase]: For 487711/487711 co-relation queries the response was YES. [2024-06-04 14:27:14,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28871 conditions, 4020 events. 2280/4020 cut-off events. For 487711/487711 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26886 event pairs, 451 based on Foata normal form. 2/4011 useless extension candidates. Maximal degree in co-relation 28724. Up to 3348 conditions per place. [2024-06-04 14:27:14,856 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 315 selfloop transitions, 93 changer transitions 0/417 dead transitions. [2024-06-04 14:27:14,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 417 transitions, 5161 flow [2024-06-04 14:27:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 14:27:14,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:27:14,857 INFO L175 Difference]: Start difference. First operand has 337 places, 382 transitions, 3955 flow. Second operand 8 states and 208 transitions. [2024-06-04 14:27:14,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 417 transitions, 5161 flow [2024-06-04 14:27:17,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 417 transitions, 5053 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:27:17,932 INFO L231 Difference]: Finished difference. Result has 341 places, 387 transitions, 4156 flow [2024-06-04 14:27:17,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4156, PETRI_PLACES=341, PETRI_TRANSITIONS=387} [2024-06-04 14:27:17,933 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-04 14:27:17,933 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 387 transitions, 4156 flow [2024-06-04 14:27:17,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:17,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:17,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:17,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:27:17,933 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 14:27:17,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash -691897896, now seen corresponding path program 8 times [2024-06-04 14:27:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:17,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291523499] [2024-06-04 14:27:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:17,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:18,064 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 14:27:18,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:18,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291523499] [2024-06-04 14:27:18,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291523499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:18,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:18,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631301693] [2024-06-04 14:27:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:18,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:18,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 387 transitions, 4156 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:18,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:18,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:18,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:18,765 INFO L124 PetriNetUnfolderBase]: 2288/4037 cut-off events. [2024-06-04 14:27:18,765 INFO L125 PetriNetUnfolderBase]: For 498092/498092 co-relation queries the response was YES. [2024-06-04 14:27:18,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29228 conditions, 4037 events. 2288/4037 cut-off events. For 498092/498092 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27046 event pairs, 458 based on Foata normal form. 2/4033 useless extension candidates. Maximal degree in co-relation 29079. Up to 3395 conditions per place. [2024-06-04 14:27:18,820 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 91 changer transitions 0/414 dead transitions. [2024-06-04 14:27:18,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 414 transitions, 5078 flow [2024-06-04 14:27:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:27:18,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-04 14:27:18,822 INFO L175 Difference]: Start difference. First operand has 341 places, 387 transitions, 4156 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:27:18,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 414 transitions, 5078 flow [2024-06-04 14:27:21,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 414 transitions, 4872 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-04 14:27:21,372 INFO L231 Difference]: Finished difference. Result has 345 places, 389 transitions, 4191 flow [2024-06-04 14:27:21,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=345, PETRI_TRANSITIONS=389} [2024-06-04 14:27:21,372 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-04 14:27:21,372 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 389 transitions, 4191 flow [2024-06-04 14:27:21,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:21,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:21,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:21,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:27:21,373 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 14:27:21,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:21,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1700321752, now seen corresponding path program 9 times [2024-06-04 14:27:21,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:21,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522699795] [2024-06-04 14:27:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:27:21,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:21,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522699795] [2024-06-04 14:27:21,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522699795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:21,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:21,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:21,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879673360] [2024-06-04 14:27:21,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:21,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:21,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:21,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:21,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 389 transitions, 4191 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:21,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:21,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:21,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:22,181 INFO L124 PetriNetUnfolderBase]: 2296/4049 cut-off events. [2024-06-04 14:27:22,181 INFO L125 PetriNetUnfolderBase]: For 505042/505042 co-relation queries the response was YES. [2024-06-04 14:27:22,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29295 conditions, 4049 events. 2296/4049 cut-off events. For 505042/505042 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 27111 event pairs, 458 based on Foata normal form. 2/4045 useless extension candidates. Maximal degree in co-relation 29144. Up to 3407 conditions per place. [2024-06-04 14:27:22,234 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 90 changer transitions 0/413 dead transitions. [2024-06-04 14:27:22,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 413 transitions, 5079 flow [2024-06-04 14:27:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 14:27:22,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:27:22,235 INFO L175 Difference]: Start difference. First operand has 345 places, 389 transitions, 4191 flow. Second operand 8 states and 200 transitions. [2024-06-04 14:27:22,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 413 transitions, 5079 flow [2024-06-04 14:27:25,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 413 transitions, 4888 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:25,428 INFO L231 Difference]: Finished difference. Result has 347 places, 391 transitions, 4215 flow [2024-06-04 14:27:25,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=347, PETRI_TRANSITIONS=391} [2024-06-04 14:27:25,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-04 14:27:25,429 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 391 transitions, 4215 flow [2024-06-04 14:27:25,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:25,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:25,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:27:25,429 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 14:27:25,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash -884189130, now seen corresponding path program 10 times [2024-06-04 14:27:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:25,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581185397] [2024-06-04 14:27:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:25,561 INFO 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 14:27:25,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:25,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581185397] [2024-06-04 14:27:25,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581185397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:25,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:25,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766258392] [2024-06-04 14:27:25,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:25,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:25,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:25,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:25,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 391 transitions, 4215 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:25,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:25,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:25,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:26,299 INFO L124 PetriNetUnfolderBase]: 2304/4061 cut-off events. [2024-06-04 14:27:26,299 INFO L125 PetriNetUnfolderBase]: For 514075/514075 co-relation queries the response was YES. [2024-06-04 14:27:26,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29459 conditions, 4061 events. 2304/4061 cut-off events. For 514075/514075 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 27178 event pairs, 458 based on Foata normal form. 2/4057 useless extension candidates. Maximal degree in co-relation 29307. Up to 3419 conditions per place. [2024-06-04 14:27:26,348 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 313 selfloop transitions, 90 changer transitions 0/412 dead transitions. [2024-06-04 14:27:26,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 412 transitions, 5097 flow [2024-06-04 14:27:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:27:26,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-04 14:27:26,350 INFO L175 Difference]: Start difference. First operand has 347 places, 391 transitions, 4215 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:27:26,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 412 transitions, 5097 flow [2024-06-04 14:27:29,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 412 transitions, 4904 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:29,566 INFO L231 Difference]: Finished difference. Result has 349 places, 393 transitions, 4241 flow [2024-06-04 14:27:29,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4241, PETRI_PLACES=349, PETRI_TRANSITIONS=393} [2024-06-04 14:27:29,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-04 14:27:29,567 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 393 transitions, 4241 flow [2024-06-04 14:27:29,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:29,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:29,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:29,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:27:29,567 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 14:27:29,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1994650604, now seen corresponding path program 11 times [2024-06-04 14:27:29,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:29,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286365278] [2024-06-04 14:27:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:29,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:29,707 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 14:27:29,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:29,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286365278] [2024-06-04 14:27:29,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286365278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:29,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:29,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:29,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960018251] [2024-06-04 14:27:29,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:29,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:29,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:29,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:29,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 393 transitions, 4241 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:29,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:29,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:29,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:30,443 INFO L124 PetriNetUnfolderBase]: 2312/4077 cut-off events. [2024-06-04 14:27:30,444 INFO L125 PetriNetUnfolderBase]: For 523040/523040 co-relation queries the response was YES. [2024-06-04 14:27:30,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29614 conditions, 4077 events. 2312/4077 cut-off events. For 523040/523040 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27263 event pairs, 452 based on Foata normal form. 2/4076 useless extension candidates. Maximal degree in co-relation 29461. Up to 3542 conditions per place. [2024-06-04 14:27:30,499 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 375 selfloop transitions, 30 changer transitions 0/414 dead transitions. [2024-06-04 14:27:30,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 414 transitions, 5127 flow [2024-06-04 14:27:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 14:27:30,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-04 14:27:30,501 INFO L175 Difference]: Start difference. First operand has 349 places, 393 transitions, 4241 flow. Second operand 8 states and 193 transitions. [2024-06-04 14:27:30,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 414 transitions, 5127 flow [2024-06-04 14:27:33,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 414 transitions, 4930 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:33,429 INFO L231 Difference]: Finished difference. Result has 351 places, 395 transitions, 4143 flow [2024-06-04 14:27:33,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4143, PETRI_PLACES=351, PETRI_TRANSITIONS=395} [2024-06-04 14:27:33,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-04 14:27:33,429 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 395 transitions, 4143 flow [2024-06-04 14:27:33,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:33,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:33,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:33,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:27:33,430 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 14:27:33,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:33,430 INFO L85 PathProgramCache]: Analyzing trace with hash -578087562, now seen corresponding path program 12 times [2024-06-04 14:27:33,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:33,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728593478] [2024-06-04 14:27:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:33,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:33,561 INFO 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 14:27:33,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728593478] [2024-06-04 14:27:33,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728593478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:33,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:33,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:33,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850930879] [2024-06-04 14:27:33,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:33,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:33,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:33,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:33,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 395 transitions, 4143 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:33,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:33,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:33,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:34,279 INFO L124 PetriNetUnfolderBase]: 2320/4091 cut-off events. [2024-06-04 14:27:34,280 INFO L125 PetriNetUnfolderBase]: For 532035/532035 co-relation queries the response was YES. [2024-06-04 14:27:34,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29624 conditions, 4091 events. 2320/4091 cut-off events. For 532035/532035 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27378 event pairs, 450 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 29470. Up to 3540 conditions per place. [2024-06-04 14:27:34,337 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 375 selfloop transitions, 34 changer transitions 0/418 dead transitions. [2024-06-04 14:27:34,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 418 transitions, 5039 flow [2024-06-04 14:27:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:27:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:27:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 14:27:34,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2024-06-04 14:27:34,338 INFO L175 Difference]: Start difference. First operand has 351 places, 395 transitions, 4143 flow. Second operand 9 states and 214 transitions. [2024-06-04 14:27:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 418 transitions, 5039 flow [2024-06-04 14:27:37,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 418 transitions, 4964 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:27:37,249 INFO L231 Difference]: Finished difference. Result has 354 places, 397 transitions, 4173 flow [2024-06-04 14:27:37,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4173, PETRI_PLACES=354, PETRI_TRANSITIONS=397} [2024-06-04 14:27:37,250 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-04 14:27:37,250 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 397 transitions, 4173 flow [2024-06-04 14:27:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:37,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:37,250 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, 1] [2024-06-04 14:27:37,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:27:37,250 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 14:27:37,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1540225164, now seen corresponding path program 4 times [2024-06-04 14:27:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478698832] [2024-06-04 14:27:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:37,371 INFO 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 14:27:37,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478698832] [2024-06-04 14:27:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478698832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:37,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:37,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:37,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439840281] [2024-06-04 14:27:37,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:37,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:37,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:37,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:37,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 397 transitions, 4173 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:37,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:37,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:37,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:38,077 INFO L124 PetriNetUnfolderBase]: 2336/4118 cut-off events. [2024-06-04 14:27:38,077 INFO L125 PetriNetUnfolderBase]: For 534925/534925 co-relation queries the response was YES. [2024-06-04 14:27:38,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29871 conditions, 4118 events. 2336/4118 cut-off events. For 534925/534925 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27660 event pairs, 461 based on Foata normal form. 1/4113 useless extension candidates. Maximal degree in co-relation 29716. Up to 3461 conditions per place. [2024-06-04 14:27:38,131 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 373 selfloop transitions, 48 changer transitions 0/430 dead transitions. [2024-06-04 14:27:38,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 430 transitions, 5173 flow [2024-06-04 14:27:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:27:38,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:27:38,132 INFO L175 Difference]: Start difference. First operand has 354 places, 397 transitions, 4173 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:27:38,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 430 transitions, 5173 flow [2024-06-04 14:27:41,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 430 transitions, 5094 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 14:27:41,188 INFO L231 Difference]: Finished difference. Result has 355 places, 403 transitions, 4292 flow [2024-06-04 14:27:41,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4292, PETRI_PLACES=355, PETRI_TRANSITIONS=403} [2024-06-04 14:27:41,188 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-04 14:27:41,189 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 403 transitions, 4292 flow [2024-06-04 14:27:41,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:41,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:41,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:41,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:27:41,189 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 14:27:41,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:41,190 INFO L85 PathProgramCache]: Analyzing trace with hash -691892936, now seen corresponding path program 5 times [2024-06-04 14:27:41,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:41,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502003479] [2024-06-04 14:27:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:41,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:41,330 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 14:27:41,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:41,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502003479] [2024-06-04 14:27:41,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502003479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:41,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:41,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935809936] [2024-06-04 14:27:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:41,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:41,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:41,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 403 transitions, 4292 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:41,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:41,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:41,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:42,074 INFO L124 PetriNetUnfolderBase]: 2357/4150 cut-off events. [2024-06-04 14:27:42,075 INFO L125 PetriNetUnfolderBase]: For 559978/559978 co-relation queries the response was YES. [2024-06-04 14:27:42,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30911 conditions, 4150 events. 2357/4150 cut-off events. For 559978/559978 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27928 event pairs, 467 based on Foata normal form. 1/4142 useless extension candidates. Maximal degree in co-relation 30755. Up to 3299 conditions per place. [2024-06-04 14:27:42,131 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 288 selfloop transitions, 146 changer transitions 0/443 dead transitions. [2024-06-04 14:27:42,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 443 transitions, 6412 flow [2024-06-04 14:27:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 14:27:42,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-04 14:27:42,133 INFO L175 Difference]: Start difference. First operand has 355 places, 403 transitions, 4292 flow. Second operand 8 states and 212 transitions. [2024-06-04 14:27:42,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 443 transitions, 6412 flow [2024-06-04 14:27:45,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 443 transitions, 6264 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 14:27:45,139 INFO L231 Difference]: Finished difference. Result has 358 places, 415 transitions, 4728 flow [2024-06-04 14:27:45,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4728, PETRI_PLACES=358, PETRI_TRANSITIONS=415} [2024-06-04 14:27:45,140 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-04 14:27:45,140 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 415 transitions, 4728 flow [2024-06-04 14:27:45,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:45,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:45,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:27:45,141 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 14:27:45,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1633153096, now seen corresponding path program 6 times [2024-06-04 14:27:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:45,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050335909] [2024-06-04 14:27:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:45,265 INFO 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 14:27:45,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:45,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050335909] [2024-06-04 14:27:45,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050335909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:45,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:45,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981994977] [2024-06-04 14:27:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:45,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:45,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:45,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:45,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 415 transitions, 4728 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:45,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:45,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:46,118 INFO L124 PetriNetUnfolderBase]: 2362/4162 cut-off events. [2024-06-04 14:27:46,118 INFO L125 PetriNetUnfolderBase]: For 573122/573122 co-relation queries the response was YES. [2024-06-04 14:27:46,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31589 conditions, 4162 events. 2362/4162 cut-off events. For 573122/573122 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28021 event pairs, 461 based on Foata normal form. 1/4157 useless extension candidates. Maximal degree in co-relation 31432. Up to 3484 conditions per place. [2024-06-04 14:27:46,171 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 378 selfloop transitions, 61 changer transitions 0/448 dead transitions. [2024-06-04 14:27:46,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 448 transitions, 5984 flow [2024-06-04 14:27:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:27:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:27:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-04 14:27:46,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-04 14:27:46,172 INFO L175 Difference]: Start difference. First operand has 358 places, 415 transitions, 4728 flow. Second operand 10 states and 247 transitions. [2024-06-04 14:27:46,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 448 transitions, 5984 flow [2024-06-04 14:27:49,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 448 transitions, 5739 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-06-04 14:27:49,559 INFO L231 Difference]: Finished difference. Result has 367 places, 418 transitions, 4697 flow [2024-06-04 14:27:49,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4697, PETRI_PLACES=367, PETRI_TRANSITIONS=418} [2024-06-04 14:27:49,560 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-04 14:27:49,560 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 418 transitions, 4697 flow [2024-06-04 14:27:49,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:49,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:49,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:27:49,560 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 14:27:49,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:49,561 INFO L85 PathProgramCache]: Analyzing trace with hash 582492020, now seen corresponding path program 7 times [2024-06-04 14:27:49,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:49,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308236851] [2024-06-04 14:27:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:49,680 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 14:27:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:49,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308236851] [2024-06-04 14:27:49,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308236851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:49,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:49,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:49,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399865844] [2024-06-04 14:27:49,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:49,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:49,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:49,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:49,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 418 transitions, 4697 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:49,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:49,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:49,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:50,439 INFO L124 PetriNetUnfolderBase]: 2359/4158 cut-off events. [2024-06-04 14:27:50,440 INFO L125 PetriNetUnfolderBase]: For 574867/574867 co-relation queries the response was YES. [2024-06-04 14:27:50,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31535 conditions, 4158 events. 2359/4158 cut-off events. For 574867/574867 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28030 event pairs, 461 based on Foata normal form. 1/4153 useless extension candidates. Maximal degree in co-relation 31375. Up to 3481 conditions per place. [2024-06-04 14:27:50,498 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 373 selfloop transitions, 60 changer transitions 0/442 dead transitions. [2024-06-04 14:27:50,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 442 transitions, 5623 flow [2024-06-04 14:27:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:27:50,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-04 14:27:50,500 INFO L175 Difference]: Start difference. First operand has 367 places, 418 transitions, 4697 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:27:50,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 442 transitions, 5623 flow [2024-06-04 14:27:53,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 442 transitions, 5439 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-04 14:27:53,632 INFO L231 Difference]: Finished difference. Result has 367 places, 418 transitions, 4639 flow [2024-06-04 14:27:53,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=367, PETRI_TRANSITIONS=418} [2024-06-04 14:27:53,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-04 14:27:53,633 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 418 transitions, 4639 flow [2024-06-04 14:27:53,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:53,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:53,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:27:53,633 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 14:27:53,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1700326712, now seen corresponding path program 8 times [2024-06-04 14:27:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570511290] [2024-06-04 14:27:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:53,804 INFO 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 14:27:53,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:53,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570511290] [2024-06-04 14:27:53,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570511290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:53,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:53,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:53,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355938782] [2024-06-04 14:27:53,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:53,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:53,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:53,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:53,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:53,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:53,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 418 transitions, 4639 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:53,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:53,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:53,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:54,539 INFO L124 PetriNetUnfolderBase]: 2372/4177 cut-off events. [2024-06-04 14:27:54,540 INFO L125 PetriNetUnfolderBase]: For 591141/591141 co-relation queries the response was YES. [2024-06-04 14:27:54,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31831 conditions, 4177 events. 2372/4177 cut-off events. For 591141/591141 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28123 event pairs, 467 based on Foata normal form. 1/4169 useless extension candidates. Maximal degree in co-relation 31670. Up to 3317 conditions per place. [2024-06-04 14:27:54,596 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 286 selfloop transitions, 153 changer transitions 0/448 dead transitions. [2024-06-04 14:27:54,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 448 transitions, 6379 flow [2024-06-04 14:27:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 14:27:54,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:27:54,597 INFO L175 Difference]: Start difference. First operand has 367 places, 418 transitions, 4639 flow. Second operand 8 states and 208 transitions. [2024-06-04 14:27:54,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 448 transitions, 6379 flow [2024-06-04 14:27:57,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 448 transitions, 6259 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:27:57,374 INFO L231 Difference]: Finished difference. Result has 368 places, 424 transitions, 4939 flow [2024-06-04 14:27:57,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4939, PETRI_PLACES=368, PETRI_TRANSITIONS=424} [2024-06-04 14:27:57,375 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-04 14:27:57,375 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 424 transitions, 4939 flow [2024-06-04 14:27:57,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:57,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:27:57,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:27:57,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:27:57,375 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 14:27:57,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:27:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1706992952, now seen corresponding path program 9 times [2024-06-04 14:27:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:27:57,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62123181] [2024-06-04 14:27:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:27:57,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:27:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:27:57,495 INFO 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 14:27:57,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:27:57,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62123181] [2024-06-04 14:27:57,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62123181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:27:57,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:27:57,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:27:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920976108] [2024-06-04 14:27:57,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:27:57,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:27:57,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:27:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:27:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:27:57,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:27:57,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 424 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:27:57,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:27:57,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:27:57,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:27:58,295 INFO L124 PetriNetUnfolderBase]: 2369/4173 cut-off events. [2024-06-04 14:27:58,295 INFO L125 PetriNetUnfolderBase]: For 594656/594656 co-relation queries the response was YES. [2024-06-04 14:27:58,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31957 conditions, 4173 events. 2369/4173 cut-off events. For 594656/594656 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28147 event pairs, 467 based on Foata normal form. 1/4165 useless extension candidates. Maximal degree in co-relation 31795. Up to 3314 conditions per place. [2024-06-04 14:27:58,348 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 154 changer transitions 0/447 dead transitions. [2024-06-04 14:27:58,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 447 transitions, 6339 flow [2024-06-04 14:27:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:27:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:27:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:27:58,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-04 14:27:58,349 INFO L175 Difference]: Start difference. First operand has 368 places, 424 transitions, 4939 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:27:58,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 447 transitions, 6339 flow [2024-06-04 14:28:01,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 447 transitions, 6019 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 14:28:01,705 INFO L231 Difference]: Finished difference. Result has 372 places, 424 transitions, 4933 flow [2024-06-04 14:28:01,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4933, PETRI_PLACES=372, PETRI_TRANSITIONS=424} [2024-06-04 14:28:01,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-04 14:28:01,706 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 424 transitions, 4933 flow [2024-06-04 14:28:01,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:01,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:01,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:28:01,706 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 14:28:01,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash -691885992, now seen corresponding path program 4 times [2024-06-04 14:28:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142942778] [2024-06-04 14:28:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:01,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:01,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142942778] [2024-06-04 14:28:01,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142942778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:01,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:01,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:01,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498214522] [2024-06-04 14:28:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:01,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:01,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:01,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:01,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 424 transitions, 4933 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:01,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:01,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:01,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:02,560 INFO L124 PetriNetUnfolderBase]: 2382/4197 cut-off events. [2024-06-04 14:28:02,561 INFO L125 PetriNetUnfolderBase]: For 611686/611686 co-relation queries the response was YES. [2024-06-04 14:28:02,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32304 conditions, 4197 events. 2382/4197 cut-off events. For 611686/611686 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28354 event pairs, 464 based on Foata normal form. 1/4190 useless extension candidates. Maximal degree in co-relation 32141. Up to 3397 conditions per place. [2024-06-04 14:28:02,620 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 144 changer transitions 0/460 dead transitions. [2024-06-04 14:28:02,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 460 transitions, 6807 flow [2024-06-04 14:28:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-04 14:28:02,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-06-04 14:28:02,621 INFO L175 Difference]: Start difference. First operand has 372 places, 424 transitions, 4933 flow. Second operand 8 states and 210 transitions. [2024-06-04 14:28:02,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 460 transitions, 6807 flow [2024-06-04 14:28:06,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 460 transitions, 6475 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:28:06,083 INFO L231 Difference]: Finished difference. Result has 372 places, 433 transitions, 5099 flow [2024-06-04 14:28:06,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5099, PETRI_PLACES=372, PETRI_TRANSITIONS=433} [2024-06-04 14:28:06,084 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-04 14:28:06,084 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 433 transitions, 5099 flow [2024-06-04 14:28:06,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:06,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:06,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:06,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:28:06,084 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 14:28:06,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash -814859146, now seen corresponding path program 5 times [2024-06-04 14:28:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:06,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683484554] [2024-06-04 14:28:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:06,201 INFO 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 14:28:06,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683484554] [2024-06-04 14:28:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683484554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:06,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:06,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:06,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236760089] [2024-06-04 14:28:06,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:06,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:06,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:06,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:06,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:06,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:06,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 433 transitions, 5099 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:06,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:06,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:06,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:06,954 INFO L124 PetriNetUnfolderBase]: 2395/4219 cut-off events. [2024-06-04 14:28:06,955 INFO L125 PetriNetUnfolderBase]: For 631218/631218 co-relation queries the response was YES. [2024-06-04 14:28:06,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32935 conditions, 4219 events. 2395/4219 cut-off events. For 631218/631218 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28542 event pairs, 464 based on Foata normal form. 1/4212 useless extension candidates. Maximal degree in co-relation 32772. Up to 3412 conditions per place. [2024-06-04 14:28:07,013 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 310 selfloop transitions, 144 changer transitions 0/463 dead transitions. [2024-06-04 14:28:07,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 463 transitions, 6923 flow [2024-06-04 14:28:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 14:28:07,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:28:07,014 INFO L175 Difference]: Start difference. First operand has 372 places, 433 transitions, 5099 flow. Second operand 8 states and 208 transitions. [2024-06-04 14:28:07,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 463 transitions, 6923 flow [2024-06-04 14:28:10,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 463 transitions, 6681 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-04 14:28:10,596 INFO L231 Difference]: Finished difference. Result has 377 places, 439 transitions, 5295 flow [2024-06-04 14:28:10,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5295, PETRI_PLACES=377, PETRI_TRANSITIONS=439} [2024-06-04 14:28:10,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-04 14:28:10,597 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 439 transitions, 5295 flow [2024-06-04 14:28:10,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:10,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:10,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:10,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:28:10,597 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 14:28:10,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2038358692, now seen corresponding path program 6 times [2024-06-04 14:28:10,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:10,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274196867] [2024-06-04 14:28:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:10,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:10,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274196867] [2024-06-04 14:28:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274196867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706871742] [2024-06-04 14:28:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:10,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:10,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:10,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 439 transitions, 5295 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:10,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:10,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:10,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:11,492 INFO L124 PetriNetUnfolderBase]: 2392/4215 cut-off events. [2024-06-04 14:28:11,492 INFO L125 PetriNetUnfolderBase]: For 633624/633624 co-relation queries the response was YES. [2024-06-04 14:28:11,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32998 conditions, 4215 events. 2392/4215 cut-off events. For 633624/633624 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28483 event pairs, 464 based on Foata normal form. 1/4208 useless extension candidates. Maximal degree in co-relation 32833. Up to 3409 conditions per place. [2024-06-04 14:28:11,547 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 146 changer transitions 0/462 dead transitions. [2024-06-04 14:28:11,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 462 transitions, 6737 flow [2024-06-04 14:28:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:28:11,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:28:11,549 INFO L175 Difference]: Start difference. First operand has 377 places, 439 transitions, 5295 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:28:11,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 462 transitions, 6737 flow [2024-06-04 14:28:15,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 462 transitions, 6465 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:28:15,980 INFO L231 Difference]: Finished difference. Result has 381 places, 439 transitions, 5321 flow [2024-06-04 14:28:15,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5023, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5321, PETRI_PLACES=381, PETRI_TRANSITIONS=439} [2024-06-04 14:28:15,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-04 14:28:15,981 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 439 transitions, 5321 flow [2024-06-04 14:28:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:15,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:15,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:28:15,982 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 14:28:15,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash -870144712, now seen corresponding path program 10 times [2024-06-04 14:28:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:15,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035784476] [2024-06-04 14:28:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:16,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:16,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035784476] [2024-06-04 14:28:16,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035784476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:16,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:16,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:16,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513755382] [2024-06-04 14:28:16,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:16,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:16,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:16,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 439 transitions, 5321 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:16,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:16,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:16,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:16,866 INFO L124 PetriNetUnfolderBase]: 2421/4261 cut-off events. [2024-06-04 14:28:16,866 INFO L125 PetriNetUnfolderBase]: For 666614/666614 co-relation queries the response was YES. [2024-06-04 14:28:16,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33798 conditions, 4261 events. 2421/4261 cut-off events. For 666614/666614 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28893 event pairs, 467 based on Foata normal form. 1/4253 useless extension candidates. Maximal degree in co-relation 33632. Up to 3379 conditions per place. [2024-06-04 14:28:16,928 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 168 changer transitions 0/473 dead transitions. [2024-06-04 14:28:16,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 473 transitions, 7493 flow [2024-06-04 14:28:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:28:16,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:28:16,929 INFO L175 Difference]: Start difference. First operand has 381 places, 439 transitions, 5321 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:28:16,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 473 transitions, 7493 flow [2024-06-04 14:28:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 473 transitions, 7189 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:28:20,564 INFO L231 Difference]: Finished difference. Result has 382 places, 451 transitions, 5583 flow [2024-06-04 14:28:20,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5017, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5583, PETRI_PLACES=382, PETRI_TRANSITIONS=451} [2024-06-04 14:28:20,565 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-04 14:28:20,565 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 451 transitions, 5583 flow [2024-06-04 14:28:20,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:20,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:20,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:20,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:28:20,566 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 14:28:20,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -863478472, now seen corresponding path program 11 times [2024-06-04 14:28:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:20,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128845943] [2024-06-04 14:28:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:20,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:20,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:20,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128845943] [2024-06-04 14:28:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128845943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:20,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:20,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393853278] [2024-06-04 14:28:20,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:20,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:20,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:20,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 451 transitions, 5583 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:20,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:20,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:20,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:21,471 INFO L124 PetriNetUnfolderBase]: 2418/4257 cut-off events. [2024-06-04 14:28:21,471 INFO L125 PetriNetUnfolderBase]: For 669966/669966 co-relation queries the response was YES. [2024-06-04 14:28:21,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33800 conditions, 4257 events. 2418/4257 cut-off events. For 669966/669966 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28899 event pairs, 467 based on Foata normal form. 1/4249 useless extension candidates. Maximal degree in co-relation 33633. Up to 3376 conditions per place. [2024-06-04 14:28:21,532 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 170 changer transitions 0/472 dead transitions. [2024-06-04 14:28:21,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 472 transitions, 7291 flow [2024-06-04 14:28:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:28:21,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:28:21,533 INFO L175 Difference]: Start difference. First operand has 382 places, 451 transitions, 5583 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:28:21,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 472 transitions, 7291 flow [2024-06-04 14:28:25,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 472 transitions, 7057 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-04 14:28:25,285 INFO L231 Difference]: Finished difference. Result has 388 places, 451 transitions, 5695 flow [2024-06-04 14:28:25,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5695, PETRI_PLACES=388, PETRI_TRANSITIONS=451} [2024-06-04 14:28:25,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-04 14:28:25,285 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 451 transitions, 5695 flow [2024-06-04 14:28:25,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:25,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:25,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:25,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:28:25,286 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 14:28:25,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash -165528230, now seen corresponding path program 12 times [2024-06-04 14:28:25,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:25,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311959837] [2024-06-04 14:28:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:25,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:25,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:25,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311959837] [2024-06-04 14:28:25,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311959837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:25,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164988622] [2024-06-04 14:28:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:25,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:25,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 451 transitions, 5695 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:25,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:25,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:25,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:26,227 INFO L124 PetriNetUnfolderBase]: 2415/4261 cut-off events. [2024-06-04 14:28:26,228 INFO L125 PetriNetUnfolderBase]: For 673781/673781 co-relation queries the response was YES. [2024-06-04 14:28:26,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33741 conditions, 4261 events. 2415/4261 cut-off events. For 673781/673781 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28858 event pairs, 454 based on Foata normal form. 1/4259 useless extension candidates. Maximal degree in co-relation 33573. Up to 3690 conditions per place. [2024-06-04 14:28:26,290 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 429 selfloop transitions, 31 changer transitions 0/469 dead transitions. [2024-06-04 14:28:26,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 469 transitions, 6659 flow [2024-06-04 14:28:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 14:28:26,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-04 14:28:26,291 INFO L175 Difference]: Start difference. First operand has 388 places, 451 transitions, 5695 flow. Second operand 8 states and 193 transitions. [2024-06-04 14:28:26,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 469 transitions, 6659 flow [2024-06-04 14:28:29,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 469 transitions, 6299 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:28:29,969 INFO L231 Difference]: Finished difference. Result has 390 places, 451 transitions, 5403 flow [2024-06-04 14:28:29,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5403, PETRI_PLACES=390, PETRI_TRANSITIONS=451} [2024-06-04 14:28:29,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-04 14:28:29,970 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 451 transitions, 5403 flow [2024-06-04 14:28:29,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:29,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:29,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:29,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:28:29,971 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 14:28:29,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash 962266768, now seen corresponding path program 7 times [2024-06-04 14:28:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:29,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414911868] [2024-06-04 14:28:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:30,094 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 14:28:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414911868] [2024-06-04 14:28:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414911868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:30,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:30,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:30,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892856620] [2024-06-04 14:28:30,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:30,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:30,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:30,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:30,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 451 transitions, 5403 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:30,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:30,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:30,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:31,034 INFO L124 PetriNetUnfolderBase]: 2441/4304 cut-off events. [2024-06-04 14:28:31,034 INFO L125 PetriNetUnfolderBase]: For 698051/698051 co-relation queries the response was YES. [2024-06-04 14:28:31,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33986 conditions, 4304 events. 2441/4304 cut-off events. For 698051/698051 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29272 event pairs, 455 based on Foata normal form. 1/4301 useless extension candidates. Maximal degree in co-relation 33817. Up to 3689 conditions per place. [2024-06-04 14:28:31,088 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 419 selfloop transitions, 57 changer transitions 0/485 dead transitions. [2024-06-04 14:28:31,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 485 transitions, 7076 flow [2024-06-04 14:28:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:28:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:28:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 14:28:31,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 14:28:31,090 INFO L175 Difference]: Start difference. First operand has 390 places, 451 transitions, 5403 flow. Second operand 10 states and 240 transitions. [2024-06-04 14:28:31,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 485 transitions, 7076 flow [2024-06-04 14:28:35,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 485 transitions, 6984 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:28:35,209 INFO L231 Difference]: Finished difference. Result has 392 places, 463 transitions, 5610 flow [2024-06-04 14:28:35,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5610, PETRI_PLACES=392, PETRI_TRANSITIONS=463} [2024-06-04 14:28:35,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-04 14:28:35,209 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 463 transitions, 5610 flow [2024-06-04 14:28:35,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:35,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:35,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:35,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:28:35,210 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 14:28:35,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1643279140, now seen corresponding path program 8 times [2024-06-04 14:28:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554313542] [2024-06-04 14:28:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:35,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:35,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554313542] [2024-06-04 14:28:35,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554313542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:35,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:35,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:35,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714394544] [2024-06-04 14:28:35,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:35,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:35,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:35,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:35,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 463 transitions, 5610 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:35,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:35,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:35,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:36,135 INFO L124 PetriNetUnfolderBase]: 2438/4300 cut-off events. [2024-06-04 14:28:36,135 INFO L125 PetriNetUnfolderBase]: For 701015/701015 co-relation queries the response was YES. [2024-06-04 14:28:36,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33977 conditions, 4300 events. 2438/4300 cut-off events. For 701015/701015 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29291 event pairs, 455 based on Foata normal form. 1/4297 useless extension candidates. Maximal degree in co-relation 33807. Up to 3686 conditions per place. [2024-06-04 14:28:36,198 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 417 selfloop transitions, 56 changer transitions 0/482 dead transitions. [2024-06-04 14:28:36,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 482 transitions, 6852 flow [2024-06-04 14:28:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:28:36,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:28:36,199 INFO L175 Difference]: Start difference. First operand has 392 places, 463 transitions, 5610 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:28:36,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 482 transitions, 6852 flow [2024-06-04 14:28:40,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 482 transitions, 6765 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-04 14:28:40,251 INFO L231 Difference]: Finished difference. Result has 398 places, 463 transitions, 5641 flow [2024-06-04 14:28:40,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5641, PETRI_PLACES=398, PETRI_TRANSITIONS=463} [2024-06-04 14:28:40,252 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-04 14:28:40,252 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 463 transitions, 5641 flow [2024-06-04 14:28:40,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:40,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:40,252 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, 1, 1] [2024-06-04 14:28:40,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:28:40,252 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 14:28:40,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash -856805288, now seen corresponding path program 9 times [2024-06-04 14:28:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:40,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205317378] [2024-06-04 14:28:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:40,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:40,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205317378] [2024-06-04 14:28:40,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205317378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:40,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:40,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:40,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50640267] [2024-06-04 14:28:40,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:40,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:40,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:40,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:40,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 463 transitions, 5641 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:40,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:40,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:40,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:41,180 INFO L124 PetriNetUnfolderBase]: 2467/4343 cut-off events. [2024-06-04 14:28:41,181 INFO L125 PetriNetUnfolderBase]: For 736163/736163 co-relation queries the response was YES. [2024-06-04 14:28:41,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34827 conditions, 4343 events. 2467/4343 cut-off events. For 736163/736163 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29592 event pairs, 464 based on Foata normal form. 1/4336 useless extension candidates. Maximal degree in co-relation 34655. Up to 3499 conditions per place. [2024-06-04 14:28:41,249 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 322 selfloop transitions, 166 changer transitions 0/497 dead transitions. [2024-06-04 14:28:41,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 497 transitions, 7878 flow [2024-06-04 14:28:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:28:41,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:28:41,250 INFO L175 Difference]: Start difference. First operand has 398 places, 463 transitions, 5641 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:28:41,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 497 transitions, 7878 flow [2024-06-04 14:28:44,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 497 transitions, 7766 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:28:44,596 INFO L231 Difference]: Finished difference. Result has 399 places, 475 transitions, 6068 flow [2024-06-04 14:28:44,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6068, PETRI_PLACES=399, PETRI_TRANSITIONS=475} [2024-06-04 14:28:44,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-04 14:28:44,597 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 475 transitions, 6068 flow [2024-06-04 14:28:44,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:44,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:44,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:44,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:28:44,598 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 14:28:44,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1955727128, now seen corresponding path program 10 times [2024-06-04 14:28:44,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:44,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445693085] [2024-06-04 14:28:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445693085] [2024-06-04 14:28:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445693085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:44,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:44,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077244575] [2024-06-04 14:28:44,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:44,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:44,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:44,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:44,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 475 transitions, 6068 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:44,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:44,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:44,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:45,527 INFO L124 PetriNetUnfolderBase]: 2464/4339 cut-off events. [2024-06-04 14:28:45,527 INFO L125 PetriNetUnfolderBase]: For 740215/740215 co-relation queries the response was YES. [2024-06-04 14:28:45,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35024 conditions, 4339 events. 2464/4339 cut-off events. For 740215/740215 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29559 event pairs, 464 based on Foata normal form. 1/4332 useless extension candidates. Maximal degree in co-relation 34851. Up to 3496 conditions per place. [2024-06-04 14:28:45,590 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 323 selfloop transitions, 165 changer transitions 0/497 dead transitions. [2024-06-04 14:28:45,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 497 transitions, 8112 flow [2024-06-04 14:28:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:28:45,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:28:45,591 INFO L175 Difference]: Start difference. First operand has 399 places, 475 transitions, 6068 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:28:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 497 transitions, 8112 flow [2024-06-04 14:28:49,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 497 transitions, 7888 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-04 14:28:49,020 INFO L231 Difference]: Finished difference. Result has 405 places, 475 transitions, 6180 flow [2024-06-04 14:28:49,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6180, PETRI_PLACES=405, PETRI_TRANSITIONS=475} [2024-06-04 14:28:49,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 360 predicate places. [2024-06-04 14:28:49,021 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 475 transitions, 6180 flow [2024-06-04 14:28:49,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:49,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:49,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:49,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:28:49,021 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 14:28:49,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2053694828, now seen corresponding path program 11 times [2024-06-04 14:28:49,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:49,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522889057] [2024-06-04 14:28:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:49,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:49,137 INFO 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 14:28:49,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:49,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522889057] [2024-06-04 14:28:49,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522889057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:49,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:49,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:49,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880567363] [2024-06-04 14:28:49,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:49,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:49,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:49,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:49,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:49,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:49,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 475 transitions, 6180 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:49,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:49,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:49,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:50,047 INFO L124 PetriNetUnfolderBase]: 2461/4335 cut-off events. [2024-06-04 14:28:50,047 INFO L125 PetriNetUnfolderBase]: For 744240/744240 co-relation queries the response was YES. [2024-06-04 14:28:50,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34955 conditions, 4335 events. 2461/4335 cut-off events. For 744240/744240 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29542 event pairs, 464 based on Foata normal form. 1/4328 useless extension candidates. Maximal degree in co-relation 34781. Up to 3493 conditions per place. [2024-06-04 14:28:50,104 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 314 selfloop transitions, 173 changer transitions 0/496 dead transitions. [2024-06-04 14:28:50,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 496 transitions, 7972 flow [2024-06-04 14:28:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:28:50,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:28:50,106 INFO L175 Difference]: Start difference. First operand has 405 places, 475 transitions, 6180 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:28:50,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 496 transitions, 7972 flow [2024-06-04 14:28:53,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 496 transitions, 7676 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:28:53,972 INFO L231 Difference]: Finished difference. Result has 408 places, 475 transitions, 6236 flow [2024-06-04 14:28:53,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6236, PETRI_PLACES=408, PETRI_TRANSITIONS=475} [2024-06-04 14:28:53,972 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-04 14:28:53,972 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 475 transitions, 6236 flow [2024-06-04 14:28:53,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:53,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:53,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:28:53,973 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 14:28:53,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2058456428, now seen corresponding path program 12 times [2024-06-04 14:28:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:53,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447837020] [2024-06-04 14:28:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:54,091 INFO 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 14:28:54,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447837020] [2024-06-04 14:28:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447837020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:54,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:54,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:54,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439388734] [2024-06-04 14:28:54,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:54,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:54,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:54,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:54,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:54,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 475 transitions, 6236 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:54,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:54,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:54,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:54,915 INFO L124 PetriNetUnfolderBase]: 2458/4336 cut-off events. [2024-06-04 14:28:54,916 INFO L125 PetriNetUnfolderBase]: For 747071/747071 co-relation queries the response was YES. [2024-06-04 14:28:54,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34900 conditions, 4336 events. 2458/4336 cut-off events. For 747071/747071 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29576 event pairs, 455 based on Foata normal form. 1/4333 useless extension candidates. Maximal degree in co-relation 34725. Up to 3724 conditions per place. [2024-06-04 14:28:54,985 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 435 selfloop transitions, 49 changer transitions 0/493 dead transitions. [2024-06-04 14:28:54,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 493 transitions, 7248 flow [2024-06-04 14:28:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:28:54,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-04 14:28:54,987 INFO L175 Difference]: Start difference. First operand has 408 places, 475 transitions, 6236 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:28:54,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 493 transitions, 7248 flow [2024-06-04 14:28:58,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 493 transitions, 6886 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:28:58,789 INFO L231 Difference]: Finished difference. Result has 410 places, 475 transitions, 5978 flow [2024-06-04 14:28:58,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5978, PETRI_PLACES=410, PETRI_TRANSITIONS=475} [2024-06-04 14:28:58,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 365 predicate places. [2024-06-04 14:28:58,789 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 475 transitions, 5978 flow [2024-06-04 14:28:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:58,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:28:58,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:28:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:28:58,790 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 14:28:58,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:28:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1997498636, now seen corresponding path program 3 times [2024-06-04 14:28:58,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:28:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762270618] [2024-06-04 14:28:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:28:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:28:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:28:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:28:58,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:28:58,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762270618] [2024-06-04 14:28:58,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762270618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:28:58,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:28:58,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:28:58,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416064545] [2024-06-04 14:28:58,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:28:58,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:28:58,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:28:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:28:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:28:58,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:28:58,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 475 transitions, 5978 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:28:58,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:28:58,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:28:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:28:59,722 INFO L124 PetriNetUnfolderBase]: 2478/4370 cut-off events. [2024-06-04 14:28:59,722 INFO L125 PetriNetUnfolderBase]: For 799778/799778 co-relation queries the response was YES. [2024-06-04 14:28:59,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34936 conditions, 4370 events. 2478/4370 cut-off events. For 799778/799778 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 29828 event pairs, 453 based on Foata normal form. 6/4372 useless extension candidates. Maximal degree in co-relation 34760. Up to 3693 conditions per place. [2024-06-04 14:28:59,788 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 444 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-04 14:28:59,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 501 transitions, 7106 flow [2024-06-04 14:28:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:28:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:28:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 14:28:59,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-04 14:28:59,790 INFO L175 Difference]: Start difference. First operand has 410 places, 475 transitions, 5978 flow. Second operand 8 states and 201 transitions. [2024-06-04 14:28:59,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 501 transitions, 7106 flow [2024-06-04 14:29:04,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 501 transitions, 6928 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 14:29:04,637 INFO L231 Difference]: Finished difference. Result has 409 places, 476 transitions, 5932 flow [2024-06-04 14:29:04,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5932, PETRI_PLACES=409, PETRI_TRANSITIONS=476} [2024-06-04 14:29:04,638 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 364 predicate places. [2024-06-04 14:29:04,638 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 476 transitions, 5932 flow [2024-06-04 14:29:04,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:04,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:04,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:04,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:29:04,639 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 14:29:04,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash 579643988, now seen corresponding path program 1 times [2024-06-04 14:29:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:04,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010653785] [2024-06-04 14:29:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:04,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:29:04,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:04,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010653785] [2024-06-04 14:29:04,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010653785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:04,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:04,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:04,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156345491] [2024-06-04 14:29:04,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:04,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:04,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:04,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:04,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 476 transitions, 5932 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:04,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:04,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:04,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:05,642 INFO L124 PetriNetUnfolderBase]: 2499/4392 cut-off events. [2024-06-04 14:29:05,642 INFO L125 PetriNetUnfolderBase]: For 796237/796237 co-relation queries the response was YES. [2024-06-04 14:29:05,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35576 conditions, 4392 events. 2499/4392 cut-off events. For 796237/796237 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 29945 event pairs, 457 based on Foata normal form. 2/4386 useless extension candidates. Maximal degree in co-relation 35399. Up to 3751 conditions per place. [2024-06-04 14:29:05,714 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 468 selfloop transitions, 34 changer transitions 0/511 dead transitions. [2024-06-04 14:29:05,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 511 transitions, 7366 flow [2024-06-04 14:29:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:29:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:29:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-04 14:29:05,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-04 14:29:05,715 INFO L175 Difference]: Start difference. First operand has 409 places, 476 transitions, 5932 flow. Second operand 9 states and 224 transitions. [2024-06-04 14:29:05,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 511 transitions, 7366 flow [2024-06-04 14:29:09,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 511 transitions, 7250 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:29:09,264 INFO L231 Difference]: Finished difference. Result has 412 places, 480 transitions, 5985 flow [2024-06-04 14:29:09,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5985, PETRI_PLACES=412, PETRI_TRANSITIONS=480} [2024-06-04 14:29:09,265 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-04 14:29:09,265 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 480 transitions, 5985 flow [2024-06-04 14:29:09,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:09,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:09,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:09,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:29:09,266 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 14:29:09,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash 582500948, now seen corresponding path program 2 times [2024-06-04 14:29:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:09,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610229884] [2024-06-04 14:29:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:09,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:29:09,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:09,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610229884] [2024-06-04 14:29:09,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610229884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:09,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:09,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:09,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622525752] [2024-06-04 14:29:09,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:09,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:09,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 480 transitions, 5985 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:09,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:09,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:09,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:10,240 INFO L124 PetriNetUnfolderBase]: 2494/4392 cut-off events. [2024-06-04 14:29:10,241 INFO L125 PetriNetUnfolderBase]: For 789072/789072 co-relation queries the response was YES. [2024-06-04 14:29:10,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35298 conditions, 4392 events. 2494/4392 cut-off events. For 789072/789072 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 30031 event pairs, 465 based on Foata normal form. 2/4388 useless extension candidates. Maximal degree in co-relation 35121. Up to 3773 conditions per place. [2024-06-04 14:29:10,306 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 466 selfloop transitions, 30 changer transitions 0/505 dead transitions. [2024-06-04 14:29:10,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 505 transitions, 7039 flow [2024-06-04 14:29:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:29:10,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:29:10,307 INFO L175 Difference]: Start difference. First operand has 412 places, 480 transitions, 5985 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:29:10,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 505 transitions, 7039 flow [2024-06-04 14:29:14,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 505 transitions, 6923 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 14:29:14,906 INFO L231 Difference]: Finished difference. Result has 415 places, 480 transitions, 5934 flow [2024-06-04 14:29:14,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5934, PETRI_PLACES=415, PETRI_TRANSITIONS=480} [2024-06-04 14:29:14,906 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-04 14:29:14,906 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 480 transitions, 5934 flow [2024-06-04 14:29:14,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:14,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:14,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 14:29:14,907 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:14,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1707001880, now seen corresponding path program 3 times [2024-06-04 14:29:14,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:14,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328012150] [2024-06-04 14:29:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:15,078 INFO 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 14:29:15,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:15,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328012150] [2024-06-04 14:29:15,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328012150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:15,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:15,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:15,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044646023] [2024-06-04 14:29:15,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:15,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:15,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:15,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:15,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 480 transitions, 5934 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:15,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:15,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:15,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:16,005 INFO L124 PetriNetUnfolderBase]: 2502/4401 cut-off events. [2024-06-04 14:29:16,006 INFO L125 PetriNetUnfolderBase]: For 800936/800936 co-relation queries the response was YES. [2024-06-04 14:29:16,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35424 conditions, 4401 events. 2502/4401 cut-off events. For 800936/800936 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30066 event pairs, 471 based on Foata normal form. 2/4394 useless extension candidates. Maximal degree in co-relation 35245. Up to 3710 conditions per place. [2024-06-04 14:29:16,068 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 406 selfloop transitions, 89 changer transitions 0/504 dead transitions. [2024-06-04 14:29:16,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 504 transitions, 7028 flow [2024-06-04 14:29:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 14:29:16,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-04 14:29:16,069 INFO L175 Difference]: Start difference. First operand has 415 places, 480 transitions, 5934 flow. Second operand 8 states and 201 transitions. [2024-06-04 14:29:16,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 504 transitions, 7028 flow [2024-06-04 14:29:20,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 504 transitions, 6963 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 14:29:20,264 INFO L231 Difference]: Finished difference. Result has 416 places, 482 transitions, 6106 flow [2024-06-04 14:29:20,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6106, PETRI_PLACES=416, PETRI_TRANSITIONS=482} [2024-06-04 14:29:20,265 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-04 14:29:20,265 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 482 transitions, 6106 flow [2024-06-04 14:29:20,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:20,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:20,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:20,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 14:29:20,265 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:20,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash 582505908, now seen corresponding path program 1 times [2024-06-04 14:29:20,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:20,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228321189] [2024-06-04 14:29:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:20,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:20,387 INFO 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 14:29:20,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:20,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228321189] [2024-06-04 14:29:20,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228321189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:20,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:20,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830831797] [2024-06-04 14:29:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:20,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:20,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:20,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:20,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 482 transitions, 6106 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:20,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:20,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:20,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:21,287 INFO L124 PetriNetUnfolderBase]: 2507/4413 cut-off events. [2024-06-04 14:29:21,288 INFO L125 PetriNetUnfolderBase]: For 804591/804591 co-relation queries the response was YES. [2024-06-04 14:29:21,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35811 conditions, 4413 events. 2507/4413 cut-off events. For 804591/804591 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30181 event pairs, 464 based on Foata normal form. 1/4408 useless extension candidates. Maximal degree in co-relation 35631. Up to 3795 conditions per place. [2024-06-04 14:29:21,356 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 469 selfloop transitions, 31 changer transitions 0/509 dead transitions. [2024-06-04 14:29:21,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 509 transitions, 7234 flow [2024-06-04 14:29:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:29:21,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:29:21,358 INFO L175 Difference]: Start difference. First operand has 416 places, 482 transitions, 6106 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:29:21,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 509 transitions, 7234 flow [2024-06-04 14:29:25,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 509 transitions, 7013 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:29:25,878 INFO L231 Difference]: Finished difference. Result has 418 places, 485 transitions, 6027 flow [2024-06-04 14:29:25,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6027, PETRI_PLACES=418, PETRI_TRANSITIONS=485} [2024-06-04 14:29:25,892 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-04 14:29:25,893 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 485 transitions, 6027 flow [2024-06-04 14:29:25,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:25,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:25,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:25,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 14:29:25,893 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:25,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash 863436212, now seen corresponding path program 2 times [2024-06-04 14:29:25,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:25,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589985903] [2024-06-04 14:29:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:25,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:26,076 INFO 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 14:29:26,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:26,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589985903] [2024-06-04 14:29:26,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589985903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:26,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:26,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:26,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250496937] [2024-06-04 14:29:26,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:26,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:26,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:26,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:26,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:26,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 485 transitions, 6027 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:26,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:26,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:26,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:26,943 INFO L124 PetriNetUnfolderBase]: 2528/4442 cut-off events. [2024-06-04 14:29:26,943 INFO L125 PetriNetUnfolderBase]: For 834777/834777 co-relation queries the response was YES. [2024-06-04 14:29:26,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36582 conditions, 4442 events. 2528/4442 cut-off events. For 834777/834777 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30421 event pairs, 477 based on Foata normal form. 1/4431 useless extension candidates. Maximal degree in co-relation 36401. Up to 3618 conditions per place. [2024-06-04 14:29:27,014 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 384 selfloop transitions, 128 changer transitions 0/521 dead transitions. [2024-06-04 14:29:27,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 521 transitions, 8215 flow [2024-06-04 14:29:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-04 14:29:27,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-04 14:29:27,016 INFO L175 Difference]: Start difference. First operand has 418 places, 485 transitions, 6027 flow. Second operand 8 states and 209 transitions. [2024-06-04 14:29:27,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 521 transitions, 8215 flow [2024-06-04 14:29:31,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 521 transitions, 8095 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:29:31,768 INFO L231 Difference]: Finished difference. Result has 420 places, 497 transitions, 6471 flow [2024-06-04 14:29:31,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6471, PETRI_PLACES=420, PETRI_TRANSITIONS=497} [2024-06-04 14:29:31,768 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-04 14:29:31,769 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 497 transitions, 6471 flow [2024-06-04 14:29:31,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:31,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:31,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 14:29:31,769 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:31,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 870102452, now seen corresponding path program 3 times [2024-06-04 14:29:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967929049] [2024-06-04 14:29:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:31,887 INFO 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 14:29:31,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:31,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967929049] [2024-06-04 14:29:31,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967929049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:31,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:31,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:31,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520681271] [2024-06-04 14:29:31,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:31,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:31,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:31,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:31,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 497 transitions, 6471 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:31,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:31,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:31,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:32,756 INFO L124 PetriNetUnfolderBase]: 2525/4438 cut-off events. [2024-06-04 14:29:32,756 INFO L125 PetriNetUnfolderBase]: For 840860/840860 co-relation queries the response was YES. [2024-06-04 14:29:32,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36912 conditions, 4438 events. 2525/4438 cut-off events. For 840860/840860 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30399 event pairs, 477 based on Foata normal form. 1/4427 useless extension candidates. Maximal degree in co-relation 36730. Up to 3615 conditions per place. [2024-06-04 14:29:32,827 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 382 selfloop transitions, 129 changer transitions 0/520 dead transitions. [2024-06-04 14:29:32,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 520 transitions, 8093 flow [2024-06-04 14:29:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:29:32,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-04 14:29:32,829 INFO L175 Difference]: Start difference. First operand has 420 places, 497 transitions, 6471 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:29:32,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 520 transitions, 8093 flow [2024-06-04 14:29:37,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 520 transitions, 7902 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-04 14:29:37,539 INFO L231 Difference]: Finished difference. Result has 426 places, 497 transitions, 6544 flow [2024-06-04 14:29:37,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6544, PETRI_PLACES=426, PETRI_TRANSITIONS=497} [2024-06-04 14:29:37,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-04 14:29:37,540 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 497 transitions, 6544 flow [2024-06-04 14:29:37,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:37,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:37,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 14:29:37,541 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:37,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash 870111380, now seen corresponding path program 1 times [2024-06-04 14:29:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:37,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782355204] [2024-06-04 14:29:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:29:37,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782355204] [2024-06-04 14:29:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782355204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:37,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:37,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521974594] [2024-06-04 14:29:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:37,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:37,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:37,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:37,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 497 transitions, 6544 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:37,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:37,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:37,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:38,557 INFO L124 PetriNetUnfolderBase]: 2533/4455 cut-off events. [2024-06-04 14:29:38,557 INFO L125 PetriNetUnfolderBase]: For 862419/862419 co-relation queries the response was YES. [2024-06-04 14:29:38,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37287 conditions, 4455 events. 2533/4455 cut-off events. For 862419/862419 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30545 event pairs, 467 based on Foata normal form. 2/4449 useless extension candidates. Maximal degree in co-relation 37103. Up to 3778 conditions per place. [2024-06-04 14:29:38,627 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 421 selfloop transitions, 91 changer transitions 0/521 dead transitions. [2024-06-04 14:29:38,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 521 transitions, 7678 flow [2024-06-04 14:29:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 14:29:38,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:29:38,628 INFO L175 Difference]: Start difference. First operand has 426 places, 497 transitions, 6544 flow. Second operand 8 states and 200 transitions. [2024-06-04 14:29:38,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 521 transitions, 7678 flow [2024-06-04 14:29:43,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 521 transitions, 7480 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:29:43,780 INFO L231 Difference]: Finished difference. Result has 428 places, 499 transitions, 6593 flow [2024-06-04 14:29:43,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6593, PETRI_PLACES=428, PETRI_TRANSITIONS=499} [2024-06-04 14:29:43,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-04 14:29:43,789 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 499 transitions, 6593 flow [2024-06-04 14:29:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:43,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:43,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:43,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 14:29:43,790 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:43,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash -877509002, now seen corresponding path program 4 times [2024-06-04 14:29:43,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:43,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753978064] [2024-06-04 14:29:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:43,919 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 14:29:43,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:43,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753978064] [2024-06-04 14:29:43,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753978064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:43,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:43,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:43,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077642649] [2024-06-04 14:29:43,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:43,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:43,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:43,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:43,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:43,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:43,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 499 transitions, 6593 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:43,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:43,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:43,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:44,985 INFO L124 PetriNetUnfolderBase]: 2541/4469 cut-off events. [2024-06-04 14:29:44,985 INFO L125 PetriNetUnfolderBase]: For 875568/875568 co-relation queries the response was YES. [2024-06-04 14:29:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37560 conditions, 4469 events. 2541/4469 cut-off events. For 875568/875568 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30660 event pairs, 472 based on Foata normal form. 2/4462 useless extension candidates. Maximal degree in co-relation 37375. Up to 3766 conditions per place. [2024-06-04 14:29:45,050 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 420 selfloop transitions, 91 changer transitions 0/520 dead transitions. [2024-06-04 14:29:45,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 520 transitions, 7721 flow [2024-06-04 14:29:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:29:45,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-04 14:29:45,052 INFO L175 Difference]: Start difference. First operand has 428 places, 499 transitions, 6593 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:29:45,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 520 transitions, 7721 flow [2024-06-04 14:29:50,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 520 transitions, 7490 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:29:50,557 INFO L231 Difference]: Finished difference. Result has 430 places, 501 transitions, 6613 flow [2024-06-04 14:29:50,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6362, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6613, PETRI_PLACES=430, PETRI_TRANSITIONS=501} [2024-06-04 14:29:50,557 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-04 14:29:50,558 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 501 transitions, 6613 flow [2024-06-04 14:29:50,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:50,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:50,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:50,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 14:29:50,558 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:50,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1700368972, now seen corresponding path program 4 times [2024-06-04 14:29:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286225640] [2024-06-04 14:29:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:50,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:50,748 INFO 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 14:29:50,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:50,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286225640] [2024-06-04 14:29:50,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286225640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:50,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:50,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:50,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847750421] [2024-06-04 14:29:50,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:50,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:50,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:50,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 501 transitions, 6613 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:50,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:50,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:50,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:51,749 INFO L124 PetriNetUnfolderBase]: 2570/4514 cut-off events. [2024-06-04 14:29:51,749 INFO L125 PetriNetUnfolderBase]: For 908533/908533 co-relation queries the response was YES. [2024-06-04 14:29:51,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38520 conditions, 4514 events. 2570/4514 cut-off events. For 908533/908533 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 31023 event pairs, 479 based on Foata normal form. 1/4503 useless extension candidates. Maximal degree in co-relation 38334. Up to 3672 conditions per place. [2024-06-04 14:29:51,819 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 140 changer transitions 0/535 dead transitions. [2024-06-04 14:29:51,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 535 transitions, 9110 flow [2024-06-04 14:29:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:29:51,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-04 14:29:51,821 INFO L175 Difference]: Start difference. First operand has 430 places, 501 transitions, 6613 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:29:51,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 535 transitions, 9110 flow [2024-06-04 14:29:58,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 535 transitions, 8875 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 14:29:58,024 INFO L231 Difference]: Finished difference. Result has 432 places, 513 transitions, 6945 flow [2024-06-04 14:29:58,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6945, PETRI_PLACES=432, PETRI_TRANSITIONS=513} [2024-06-04 14:29:58,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-04 14:29:58,025 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 513 transitions, 6945 flow [2024-06-04 14:29:58,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:58,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:29:58,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:29:58,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 14:29:58,026 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:29:58,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:29:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1707035212, now seen corresponding path program 5 times [2024-06-04 14:29:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:29:58,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624234993] [2024-06-04 14:29:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:29:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:29:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:29:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:29:58,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:29:58,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624234993] [2024-06-04 14:29:58,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624234993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:29:58,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:29:58,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:29:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766292553] [2024-06-04 14:29:58,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:29:58,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:29:58,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:29:58,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:29:58,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:29:58,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:29:58,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 513 transitions, 6945 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:29:58,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:29:58,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:29:58,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:29:59,087 INFO L124 PetriNetUnfolderBase]: 2567/4510 cut-off events. [2024-06-04 14:29:59,087 INFO L125 PetriNetUnfolderBase]: For 910880/910880 co-relation queries the response was YES. [2024-06-04 14:29:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38432 conditions, 4510 events. 2567/4510 cut-off events. For 910880/910880 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30976 event pairs, 479 based on Foata normal form. 1/4499 useless extension candidates. Maximal degree in co-relation 38245. Up to 3669 conditions per place. [2024-06-04 14:29:59,159 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 384 selfloop transitions, 141 changer transitions 0/534 dead transitions. [2024-06-04 14:29:59,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 534 transitions, 8885 flow [2024-06-04 14:29:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:29:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:29:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 14:29:59,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-04 14:29:59,161 INFO L175 Difference]: Start difference. First operand has 432 places, 513 transitions, 6945 flow. Second operand 8 states and 205 transitions. [2024-06-04 14:29:59,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 534 transitions, 8885 flow [2024-06-04 14:30:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 534 transitions, 8621 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-04 14:30:05,150 INFO L231 Difference]: Finished difference. Result has 438 places, 513 transitions, 6969 flow [2024-06-04 14:30:05,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6681, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=438, PETRI_TRANSITIONS=513} [2024-06-04 14:30:05,151 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-04 14:30:05,151 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 513 transitions, 6969 flow [2024-06-04 14:30:05,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:05,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:05,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:05,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 14:30:05,151 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:05,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2053687884, now seen corresponding path program 6 times [2024-06-04 14:30:05,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:05,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362765468] [2024-06-04 14:30:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:05,294 INFO 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 14:30:05,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:05,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362765468] [2024-06-04 14:30:05,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362765468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:05,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:05,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:05,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420640629] [2024-06-04 14:30:05,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:05,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:05,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:05,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:05,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:05,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 513 transitions, 6969 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:05,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:05,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:05,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:06,310 INFO L124 PetriNetUnfolderBase]: 2564/4506 cut-off events. [2024-06-04 14:30:06,310 INFO L125 PetriNetUnfolderBase]: For 913670/913670 co-relation queries the response was YES. [2024-06-04 14:30:06,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38288 conditions, 4506 events. 2564/4506 cut-off events. For 913670/913670 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30955 event pairs, 479 based on Foata normal form. 1/4495 useless extension candidates. Maximal degree in co-relation 38100. Up to 3666 conditions per place. [2024-06-04 14:30:06,377 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 147 changer transitions 0/533 dead transitions. [2024-06-04 14:30:06,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 533 transitions, 8629 flow [2024-06-04 14:30:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:30:06,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-04 14:30:06,379 INFO L175 Difference]: Start difference. First operand has 438 places, 513 transitions, 6969 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:30:06,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 533 transitions, 8629 flow [2024-06-04 14:30:11,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 533 transitions, 8234 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 14:30:11,391 INFO L231 Difference]: Finished difference. Result has 439 places, 513 transitions, 6874 flow [2024-06-04 14:30:11,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6574, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6874, PETRI_PLACES=439, PETRI_TRANSITIONS=513} [2024-06-04 14:30:11,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-04 14:30:11,392 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 513 transitions, 6874 flow [2024-06-04 14:30:11,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:11,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:11,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:11,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 14:30:11,392 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:11,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1700360044, now seen corresponding path program 2 times [2024-06-04 14:30:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:11,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12726580] [2024-06-04 14:30:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:11,531 INFO 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 14:30:11,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:11,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12726580] [2024-06-04 14:30:11,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12726580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:11,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:11,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:11,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843779075] [2024-06-04 14:30:11,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:11,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:11,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:11,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 513 transitions, 6874 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:11,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:11,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:11,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:12,559 INFO L124 PetriNetUnfolderBase]: 2572/4523 cut-off events. [2024-06-04 14:30:12,559 INFO L125 PetriNetUnfolderBase]: For 935590/935590 co-relation queries the response was YES. [2024-06-04 14:30:12,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38450 conditions, 4523 events. 2572/4523 cut-off events. For 935590/935590 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31082 event pairs, 469 based on Foata normal form. 2/4517 useless extension candidates. Maximal degree in co-relation 38261. Up to 3834 conditions per place. [2024-06-04 14:30:12,623 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 436 selfloop transitions, 89 changer transitions 0/534 dead transitions. [2024-06-04 14:30:12,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 534 transitions, 8032 flow [2024-06-04 14:30:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 14:30:12,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:30:12,624 INFO L175 Difference]: Start difference. First operand has 439 places, 513 transitions, 6874 flow. Second operand 8 states and 198 transitions. [2024-06-04 14:30:12,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 534 transitions, 8032 flow [2024-06-04 14:30:18,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 534 transitions, 7737 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:30:18,727 INFO L231 Difference]: Finished difference. Result has 440 places, 515 transitions, 6828 flow [2024-06-04 14:30:18,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6828, PETRI_PLACES=440, PETRI_TRANSITIONS=515} [2024-06-04 14:30:18,727 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-04 14:30:18,727 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 515 transitions, 6828 flow [2024-06-04 14:30:18,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:18,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:18,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:18,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 14:30:18,728 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:18,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2053678956, now seen corresponding path program 3 times [2024-06-04 14:30:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:18,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32265678] [2024-06-04 14:30:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:18,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:30:18,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:18,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32265678] [2024-06-04 14:30:18,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32265678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:18,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:18,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:18,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842387046] [2024-06-04 14:30:18,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:18,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:18,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:18,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 515 transitions, 6828 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:18,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:18,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:19,769 INFO L124 PetriNetUnfolderBase]: 2580/4539 cut-off events. [2024-06-04 14:30:19,769 INFO L125 PetriNetUnfolderBase]: For 948142/948142 co-relation queries the response was YES. [2024-06-04 14:30:19,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38647 conditions, 4539 events. 2580/4539 cut-off events. For 948142/948142 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 31242 event pairs, 471 based on Foata normal form. 2/4533 useless extension candidates. Maximal degree in co-relation 38457. Up to 3846 conditions per place. [2024-06-04 14:30:19,842 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 436 selfloop transitions, 91 changer transitions 0/536 dead transitions. [2024-06-04 14:30:19,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 536 transitions, 7994 flow [2024-06-04 14:30:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:30:19,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-04 14:30:19,843 INFO L175 Difference]: Start difference. First operand has 440 places, 515 transitions, 6828 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:30:19,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 536 transitions, 7994 flow [2024-06-04 14:30:26,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 536 transitions, 7779 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 14:30:26,751 INFO L231 Difference]: Finished difference. Result has 443 places, 517 transitions, 6870 flow [2024-06-04 14:30:26,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6870, PETRI_PLACES=443, PETRI_TRANSITIONS=517} [2024-06-04 14:30:26,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-04 14:30:26,770 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 517 transitions, 6870 flow [2024-06-04 14:30:26,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:26,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:26,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:26,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 14:30:26,770 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:26,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2043203436, now seen corresponding path program 4 times [2024-06-04 14:30:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:26,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997598386] [2024-06-04 14:30:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:26,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:26,905 INFO 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 14:30:26,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:26,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997598386] [2024-06-04 14:30:26,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997598386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:26,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:26,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:26,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629885541] [2024-06-04 14:30:26,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:26,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:26,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:26,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:26,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 517 transitions, 6870 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:26,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:26,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:26,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:27,835 INFO L124 PetriNetUnfolderBase]: 2601/4568 cut-off events. [2024-06-04 14:30:27,835 INFO L125 PetriNetUnfolderBase]: For 983546/983546 co-relation queries the response was YES. [2024-06-04 14:30:27,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39414 conditions, 4568 events. 2601/4568 cut-off events. For 983546/983546 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31444 event pairs, 468 based on Foata normal form. 2/4562 useless extension candidates. Maximal degree in co-relation 39223. Up to 3842 conditions per place. [2024-06-04 14:30:27,908 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 435 selfloop transitions, 99 changer transitions 0/543 dead transitions. [2024-06-04 14:30:27,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 543 transitions, 8430 flow [2024-06-04 14:30:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:30:27,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:30:27,909 INFO L175 Difference]: Start difference. First operand has 443 places, 517 transitions, 6870 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:30:27,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 543 transitions, 8430 flow [2024-06-04 14:30:33,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 543 transitions, 8189 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:30:33,580 INFO L231 Difference]: Finished difference. Result has 446 places, 522 transitions, 7006 flow [2024-06-04 14:30:33,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7006, PETRI_PLACES=446, PETRI_TRANSITIONS=522} [2024-06-04 14:30:33,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 401 predicate places. [2024-06-04 14:30:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 522 transitions, 7006 flow [2024-06-04 14:30:33,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:33,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:33,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:33,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 14:30:33,582 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:33,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash -473431596, now seen corresponding path program 13 times [2024-06-04 14:30:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604101558] [2024-06-04 14:30:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:33,728 INFO 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 14:30:33,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604101558] [2024-06-04 14:30:33,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604101558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:33,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:33,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435365870] [2024-06-04 14:30:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:33,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:33,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:33,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:33,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 522 transitions, 7006 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:33,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:33,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:33,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:34,676 INFO L124 PetriNetUnfolderBase]: 2609/4575 cut-off events. [2024-06-04 14:30:34,677 INFO L125 PetriNetUnfolderBase]: For 999993/999993 co-relation queries the response was YES. [2024-06-04 14:30:34,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39729 conditions, 4575 events. 2609/4575 cut-off events. For 999993/999993 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 31458 event pairs, 474 based on Foata normal form. 2/4561 useless extension candidates. Maximal degree in co-relation 39536. Up to 3824 conditions per place. [2024-06-04 14:30:34,753 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 452 selfloop transitions, 93 changer transitions 0/554 dead transitions. [2024-06-04 14:30:34,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 554 transitions, 8606 flow [2024-06-04 14:30:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 14:30:34,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-04 14:30:34,754 INFO L175 Difference]: Start difference. First operand has 446 places, 522 transitions, 7006 flow. Second operand 8 states and 205 transitions. [2024-06-04 14:30:34,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 554 transitions, 8606 flow [2024-06-04 14:30:41,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 554 transitions, 8400 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-04 14:30:41,373 INFO L231 Difference]: Finished difference. Result has 451 places, 527 transitions, 7159 flow [2024-06-04 14:30:41,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7159, PETRI_PLACES=451, PETRI_TRANSITIONS=527} [2024-06-04 14:30:41,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-04 14:30:41,374 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 527 transitions, 7159 flow [2024-06-04 14:30:41,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:41,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:41,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:41,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 14:30:41,374 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:41,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:41,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2142655508, now seen corresponding path program 14 times [2024-06-04 14:30:41,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:41,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722331459] [2024-06-04 14:30:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:41,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:30:41,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722331459] [2024-06-04 14:30:41,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722331459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:41,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:41,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:41,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876898272] [2024-06-04 14:30:41,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:41,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:41,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:41,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:41,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:41,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 527 transitions, 7159 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:41,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:41,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:41,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:42,460 INFO L124 PetriNetUnfolderBase]: 2617/4592 cut-off events. [2024-06-04 14:30:42,461 INFO L125 PetriNetUnfolderBase]: For 1014267/1014267 co-relation queries the response was YES. [2024-06-04 14:30:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40072 conditions, 4592 events. 2617/4592 cut-off events. For 1014267/1014267 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31608 event pairs, 481 based on Foata normal form. 2/4583 useless extension candidates. Maximal degree in co-relation 39876. Up to 3871 conditions per place. [2024-06-04 14:30:42,542 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 451 selfloop transitions, 91 changer transitions 0/551 dead transitions. [2024-06-04 14:30:42,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 551 transitions, 8371 flow [2024-06-04 14:30:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 14:30:42,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:30:42,543 INFO L175 Difference]: Start difference. First operand has 451 places, 527 transitions, 7159 flow. Second operand 8 states and 200 transitions. [2024-06-04 14:30:42,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 551 transitions, 8371 flow [2024-06-04 14:30:48,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 551 transitions, 8115 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-04 14:30:48,761 INFO L231 Difference]: Finished difference. Result has 455 places, 529 transitions, 7168 flow [2024-06-04 14:30:48,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7168, PETRI_PLACES=455, PETRI_TRANSITIONS=529} [2024-06-04 14:30:48,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-04 14:30:48,762 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 529 transitions, 7168 flow [2024-06-04 14:30:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:48,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:48,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 14:30:48,762 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:48,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:48,763 INFO L85 PathProgramCache]: Analyzing trace with hash 239907860, now seen corresponding path program 15 times [2024-06-04 14:30:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:48,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161941445] [2024-06-04 14:30:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:48,890 INFO 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 14:30:48,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:48,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161941445] [2024-06-04 14:30:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161941445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:48,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908181882] [2024-06-04 14:30:48,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:48,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:48,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:48,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:48,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:48,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:48,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 529 transitions, 7168 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:48,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:48,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:48,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:49,864 INFO L124 PetriNetUnfolderBase]: 2625/4604 cut-off events. [2024-06-04 14:30:49,864 INFO L125 PetriNetUnfolderBase]: For 1023707/1023707 co-relation queries the response was YES. [2024-06-04 14:30:49,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40029 conditions, 4604 events. 2625/4604 cut-off events. For 1023707/1023707 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 31680 event pairs, 481 based on Foata normal form. 2/4595 useless extension candidates. Maximal degree in co-relation 39831. Up to 3883 conditions per place. [2024-06-04 14:30:49,942 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 452 selfloop transitions, 89 changer transitions 0/550 dead transitions. [2024-06-04 14:30:49,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 550 transitions, 8334 flow [2024-06-04 14:30:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 14:30:49,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:30:49,943 INFO L175 Difference]: Start difference. First operand has 455 places, 529 transitions, 7168 flow. Second operand 8 states and 198 transitions. [2024-06-04 14:30:49,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 550 transitions, 8334 flow [2024-06-04 14:30:55,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 550 transitions, 8131 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:30:55,229 INFO L231 Difference]: Finished difference. Result has 457 places, 531 transitions, 7190 flow [2024-06-04 14:30:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7190, PETRI_PLACES=457, PETRI_TRANSITIONS=531} [2024-06-04 14:30:55,230 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 412 predicate places. [2024-06-04 14:30:55,230 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 531 transitions, 7190 flow [2024-06-04 14:30:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:55,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:30:55,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:30:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 14:30:55,230 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:30:55,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:30:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2026482646, now seen corresponding path program 16 times [2024-06-04 14:30:55,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:30:55,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36182594] [2024-06-04 14:30:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:30:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:30:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:30:55,363 INFO 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 14:30:55,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:30:55,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36182594] [2024-06-04 14:30:55,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36182594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:30:55,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:30:55,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:30:55,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649102210] [2024-06-04 14:30:55,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:30:55,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:30:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:30:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:30:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:30:55,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:30:55,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 531 transitions, 7190 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:30:55,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:30:55,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:30:55,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:30:56,358 INFO L124 PetriNetUnfolderBase]: 2633/4616 cut-off events. [2024-06-04 14:30:56,358 INFO L125 PetriNetUnfolderBase]: For 1037194/1037194 co-relation queries the response was YES. [2024-06-04 14:30:56,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40199 conditions, 4616 events. 2633/4616 cut-off events. For 1037194/1037194 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31796 event pairs, 481 based on Foata normal form. 2/4607 useless extension candidates. Maximal degree in co-relation 40000. Up to 3895 conditions per place. [2024-06-04 14:30:56,447 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 449 selfloop transitions, 91 changer transitions 0/549 dead transitions. [2024-06-04 14:30:56,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 549 transitions, 8350 flow [2024-06-04 14:30:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:30:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:30:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 14:30:56,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-04 14:30:56,448 INFO L175 Difference]: Start difference. First operand has 457 places, 531 transitions, 7190 flow. Second operand 8 states and 194 transitions. [2024-06-04 14:30:56,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 549 transitions, 8350 flow [2024-06-04 14:31:02,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 549 transitions, 8147 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 14:31:02,644 INFO L231 Difference]: Finished difference. Result has 459 places, 533 transitions, 7220 flow [2024-06-04 14:31:02,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7220, PETRI_PLACES=459, PETRI_TRANSITIONS=533} [2024-06-04 14:31:02,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 414 predicate places. [2024-06-04 14:31:02,644 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 533 transitions, 7220 flow [2024-06-04 14:31:02,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:02,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:31:02,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:31:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 14:31:02,645 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:31:02,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:31:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 308180662, now seen corresponding path program 17 times [2024-06-04 14:31:02,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:31:02,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099246644] [2024-06-04 14:31:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:31:02,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:31:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:31:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:31:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:31:02,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099246644] [2024-06-04 14:31:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099246644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:31:02,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:31:02,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:31:02,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106908029] [2024-06-04 14:31:02,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:31:02,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:31:02,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:31:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:31:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:31:02,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:31:02,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 533 transitions, 7220 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:02,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:31:02,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:31:02,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:31:03,815 INFO L124 PetriNetUnfolderBase]: 2628/4601 cut-off events. [2024-06-04 14:31:03,816 INFO L125 PetriNetUnfolderBase]: For 1028731/1028731 co-relation queries the response was YES. [2024-06-04 14:31:03,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39901 conditions, 4601 events. 2628/4601 cut-off events. For 1028731/1028731 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31682 event pairs, 498 based on Foata normal form. 2/4589 useless extension candidates. Maximal degree in co-relation 39701. Up to 3888 conditions per place. [2024-06-04 14:31:03,891 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 447 selfloop transitions, 91 changer transitions 0/547 dead transitions. [2024-06-04 14:31:03,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 547 transitions, 8351 flow [2024-06-04 14:31:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:31:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:31:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:31:03,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-04 14:31:03,892 INFO L175 Difference]: Start difference. First operand has 459 places, 533 transitions, 7220 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:31:03,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 547 transitions, 8351 flow [2024-06-04 14:31:11,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 547 transitions, 8096 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 14:31:11,539 INFO L231 Difference]: Finished difference. Result has 461 places, 534 transitions, 7179 flow [2024-06-04 14:31:11,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6979, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7179, PETRI_PLACES=461, PETRI_TRANSITIONS=534} [2024-06-04 14:31:11,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 416 predicate places. [2024-06-04 14:31:11,540 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 534 transitions, 7179 flow [2024-06-04 14:31:11,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:11,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:31:11,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:31:11,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 14:31:11,540 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:31:11,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:31:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1347560468, now seen corresponding path program 18 times [2024-06-04 14:31:11,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:31:11,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58126047] [2024-06-04 14:31:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:31:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:31:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:31:11,673 INFO 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 14:31:11,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:31:11,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58126047] [2024-06-04 14:31:11,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58126047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:31:11,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:31:11,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:31:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926398] [2024-06-04 14:31:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:31:11,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:31:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:31:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:31:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:31:11,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:31:11,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 534 transitions, 7179 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:11,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:31:11,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:31:11,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:31:12,898 INFO L124 PetriNetUnfolderBase]: 2623/4594 cut-off events. [2024-06-04 14:31:12,899 INFO L125 PetriNetUnfolderBase]: For 1017953/1017953 co-relation queries the response was YES. [2024-06-04 14:31:12,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39459 conditions, 4594 events. 2623/4594 cut-off events. For 1017953/1017953 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31613 event pairs, 497 based on Foata normal form. 2/4582 useless extension candidates. Maximal degree in co-relation 39258. Up to 3881 conditions per place. [2024-06-04 14:31:12,970 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 450 selfloop transitions, 89 changer transitions 0/548 dead transitions. [2024-06-04 14:31:12,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 548 transitions, 8306 flow [2024-06-04 14:31:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:31:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:31:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 14:31:12,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 14:31:12,971 INFO L175 Difference]: Start difference. First operand has 461 places, 534 transitions, 7179 flow. Second operand 8 states and 192 transitions. [2024-06-04 14:31:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 548 transitions, 8306 flow [2024-06-04 14:31:20,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 548 transitions, 8089 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:31:20,215 INFO L231 Difference]: Finished difference. Result has 463 places, 535 transitions, 7166 flow [2024-06-04 14:31:20,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6970, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7166, PETRI_PLACES=463, PETRI_TRANSITIONS=535} [2024-06-04 14:31:20,215 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 418 predicate places. [2024-06-04 14:31:20,215 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 535 transitions, 7166 flow [2024-06-04 14:31:20,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:20,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:31:20,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:31:20,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 14:31:20,216 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:31:20,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:31:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1066630164, now seen corresponding path program 19 times [2024-06-04 14:31:20,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:31:20,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551295136] [2024-06-04 14:31:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:31:20,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:31:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:31:20,358 INFO 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 14:31:20,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:31:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551295136] [2024-06-04 14:31:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551295136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:31:20,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:31:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:31:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513596891] [2024-06-04 14:31:20,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:31:20,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:31:20,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:31:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:31:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:31:20,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:31:20,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 535 transitions, 7166 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:20,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:31:20,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:31:20,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:31:21,666 INFO L124 PetriNetUnfolderBase]: 2618/4598 cut-off events. [2024-06-04 14:31:21,667 INFO L125 PetriNetUnfolderBase]: For 1006857/1006857 co-relation queries the response was YES. [2024-06-04 14:31:21,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39125 conditions, 4598 events. 2618/4598 cut-off events. For 1006857/1006857 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31645 event pairs, 472 based on Foata normal form. 2/4592 useless extension candidates. Maximal degree in co-relation 38923. Up to 3985 conditions per place. [2024-06-04 14:31:21,737 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 510 selfloop transitions, 30 changer transitions 0/549 dead transitions. [2024-06-04 14:31:21,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 549 transitions, 8296 flow [2024-06-04 14:31:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:31:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:31:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 14:31:21,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-04 14:31:21,739 INFO L175 Difference]: Start difference. First operand has 463 places, 535 transitions, 7166 flow. Second operand 8 states and 187 transitions. [2024-06-04 14:31:21,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 549 transitions, 8296 flow [2024-06-04 14:31:27,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 549 transitions, 8085 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:31:27,914 INFO L231 Difference]: Finished difference. Result has 465 places, 536 transitions, 7042 flow [2024-06-04 14:31:27,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6963, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7042, PETRI_PLACES=465, PETRI_TRANSITIONS=536} [2024-06-04 14:31:27,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-04 14:31:27,915 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 536 transitions, 7042 flow [2024-06-04 14:31:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:27,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:31:27,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:31:27,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 14:31:27,915 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:31:27,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:31:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash -173314894, now seen corresponding path program 20 times [2024-06-04 14:31:27,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:31:27,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109608169] [2024-06-04 14:31:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:31:27,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:31:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:31:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:31:28,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:31:28,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109608169] [2024-06-04 14:31:28,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109608169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:31:28,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:31:28,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:31:28,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998602534] [2024-06-04 14:31:28,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:31:28,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:31:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:31:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:31:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:31:28,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:31:28,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 536 transitions, 7042 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:28,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:31:28,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:31:28,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:31:29,404 INFO L124 PetriNetUnfolderBase]: 2613/4589 cut-off events. [2024-06-04 14:31:29,405 INFO L125 PetriNetUnfolderBase]: For 996005/996005 co-relation queries the response was YES. [2024-06-04 14:31:29,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38646 conditions, 4589 events. 2613/4589 cut-off events. For 996005/996005 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31643 event pairs, 467 based on Foata normal form. 2/4581 useless extension candidates. Maximal degree in co-relation 38443. Up to 3964 conditions per place. [2024-06-04 14:31:29,482 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 509 selfloop transitions, 34 changer transitions 0/552 dead transitions. [2024-06-04 14:31:29,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 552 transitions, 8181 flow [2024-06-04 14:31:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:31:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:31:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 14:31:29,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2024-06-04 14:31:29,484 INFO L175 Difference]: Start difference. First operand has 465 places, 536 transitions, 7042 flow. Second operand 9 states and 208 transitions. [2024-06-04 14:31:29,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 552 transitions, 8181 flow [2024-06-04 14:31:36,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 552 transitions, 8090 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:31:36,288 INFO L231 Difference]: Finished difference. Result has 468 places, 537 transitions, 7045 flow [2024-06-04 14:31:36,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6959, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7045, PETRI_PLACES=468, PETRI_TRANSITIONS=537} [2024-06-04 14:31:36,288 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 423 predicate places. [2024-06-04 14:31:36,289 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 537 transitions, 7045 flow [2024-06-04 14:31:36,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:36,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:31:36,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:31:36,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 14:31:36,289 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:31:36,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:31:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash -45779084, now seen corresponding path program 13 times [2024-06-04 14:31:36,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:31:36,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251052445] [2024-06-04 14:31:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:31:36,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:31:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:31:36,412 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 14:31:36,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:31:36,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251052445] [2024-06-04 14:31:36,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251052445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:31:36,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:31:36,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:31:36,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076582123] [2024-06-04 14:31:36,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:31:36,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:31:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:31:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:31:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:31:36,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:31:36,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 537 transitions, 7045 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:36,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:31:36,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:31:36,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:31:37,610 INFO L124 PetriNetUnfolderBase]: 2645/4647 cut-off events. [2024-06-04 14:31:37,610 INFO L125 PetriNetUnfolderBase]: For 1020439/1020439 co-relation queries the response was YES. [2024-06-04 14:31:37,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39386 conditions, 4647 events. 2645/4647 cut-off events. For 1020439/1020439 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32151 event pairs, 471 based on Foata normal form. 1/4640 useless extension candidates. Maximal degree in co-relation 39182. Up to 3892 conditions per place. [2024-06-04 14:31:37,811 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 508 selfloop transitions, 60 changer transitions 0/577 dead transitions. [2024-06-04 14:31:37,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 577 transitions, 9108 flow [2024-06-04 14:31:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:31:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:31:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-04 14:31:37,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-04 14:31:37,813 INFO L175 Difference]: Start difference. First operand has 468 places, 537 transitions, 7045 flow. Second operand 10 states and 246 transitions. [2024-06-04 14:31:37,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 577 transitions, 9108 flow [2024-06-04 14:31:45,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 577 transitions, 9035 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:31:45,391 INFO L231 Difference]: Finished difference. Result has 471 places, 549 transitions, 7351 flow [2024-06-04 14:31:45,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6972, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7351, PETRI_PLACES=471, PETRI_TRANSITIONS=549} [2024-06-04 14:31:45,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-04 14:31:45,392 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 549 transitions, 7351 flow [2024-06-04 14:31:45,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:45,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:31:45,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:31:45,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 14:31:45,393 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:31:45,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:31:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash 75876630, now seen corresponding path program 14 times [2024-06-04 14:31:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:31:45,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145557784] [2024-06-04 14:31:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:31:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:31:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:31:45,528 INFO 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 14:31:45,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:31:45,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145557784] [2024-06-04 14:31:45,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145557784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:31:45,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:31:45,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:31:45,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289277246] [2024-06-04 14:31:45,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:31:45,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:31:45,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:31:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:31:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:31:45,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:31:45,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 549 transitions, 7351 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:45,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:31:45,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:31:45,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:31:46,866 INFO L124 PetriNetUnfolderBase]: 2642/4643 cut-off events. [2024-06-04 14:31:46,866 INFO L125 PetriNetUnfolderBase]: For 1021914/1021914 co-relation queries the response was YES. [2024-06-04 14:31:46,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39394 conditions, 4643 events. 2642/4643 cut-off events. For 1021914/1021914 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32102 event pairs, 471 based on Foata normal form. 1/4636 useless extension candidates. Maximal degree in co-relation 39189. Up to 3889 conditions per place. [2024-06-04 14:31:46,950 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 503 selfloop transitions, 59 changer transitions 0/571 dead transitions. [2024-06-04 14:31:46,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 571 transitions, 8837 flow [2024-06-04 14:31:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:31:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:31:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:31:46,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-04 14:31:46,951 INFO L175 Difference]: Start difference. First operand has 471 places, 549 transitions, 7351 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:31:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 571 transitions, 8837 flow [2024-06-04 14:31:54,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 571 transitions, 8657 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-04 14:31:54,458 INFO L231 Difference]: Finished difference. Result has 476 places, 549 transitions, 7295 flow [2024-06-04 14:31:54,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7171, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7295, PETRI_PLACES=476, PETRI_TRANSITIONS=549} [2024-06-04 14:31:54,459 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 431 predicate places. [2024-06-04 14:31:54,459 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 549 transitions, 7295 flow [2024-06-04 14:31:54,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:54,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:31:54,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:31:54,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 14:31:54,460 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:31:54,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:31:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash 722067884, now seen corresponding path program 15 times [2024-06-04 14:31:54,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:31:54,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345478355] [2024-06-04 14:31:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:31:54,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:31:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:31:54,590 INFO 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 14:31:54,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:31:54,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345478355] [2024-06-04 14:31:54,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345478355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:31:54,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:31:54,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:31:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847586795] [2024-06-04 14:31:54,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:31:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:31:54,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:31:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:31:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:31:54,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:31:54,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 549 transitions, 7295 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:31:54,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:31:54,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:31:54,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:31:55,944 INFO L124 PetriNetUnfolderBase]: 2639/4639 cut-off events. [2024-06-04 14:31:55,944 INFO L125 PetriNetUnfolderBase]: For 1021658/1021658 co-relation queries the response was YES. [2024-06-04 14:31:56,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39323 conditions, 4639 events. 2639/4639 cut-off events. For 1021658/1021658 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32083 event pairs, 471 based on Foata normal form. 1/4632 useless extension candidates. Maximal degree in co-relation 39116. Up to 3895 conditions per place. [2024-06-04 14:31:56,028 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 512 selfloop transitions, 52 changer transitions 0/573 dead transitions. [2024-06-04 14:31:56,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 573 transitions, 8483 flow [2024-06-04 14:31:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:31:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:31:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:31:56,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-04 14:31:56,029 INFO L175 Difference]: Start difference. First operand has 476 places, 549 transitions, 7295 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:31:56,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 573 transitions, 8483 flow [2024-06-04 14:32:02,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 573 transitions, 8339 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 14:32:02,035 INFO L231 Difference]: Finished difference. Result has 477 places, 549 transitions, 7261 flow [2024-06-04 14:32:02,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7261, PETRI_PLACES=477, PETRI_TRANSITIONS=549} [2024-06-04 14:32:02,036 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 432 predicate places. [2024-06-04 14:32:02,036 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 549 transitions, 7261 flow [2024-06-04 14:32:02,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:02,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:02,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:32:02,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 14:32:02,037 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:02,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash 722245514, now seen corresponding path program 16 times [2024-06-04 14:32:02,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:02,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688736180] [2024-06-04 14:32:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:02,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:32:02,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:02,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688736180] [2024-06-04 14:32:02,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688736180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:02,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:02,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814017691] [2024-06-04 14:32:02,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:02,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:02,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:02,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:02,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 549 transitions, 7261 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:02,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:02,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:02,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:32:03,313 INFO L124 PetriNetUnfolderBase]: 2652/4658 cut-off events. [2024-06-04 14:32:03,314 INFO L125 PetriNetUnfolderBase]: For 1047257/1047257 co-relation queries the response was YES. [2024-06-04 14:32:03,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39739 conditions, 4658 events. 2652/4658 cut-off events. For 1047257/1047257 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 32201 event pairs, 477 based on Foata normal form. 1/4648 useless extension candidates. Maximal degree in co-relation 39531. Up to 3707 conditions per place. [2024-06-04 14:32:03,546 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 190 changer transitions 0/579 dead transitions. [2024-06-04 14:32:03,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 579 transitions, 9549 flow [2024-06-04 14:32:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:32:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:32:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:32:03,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-04 14:32:03,547 INFO L175 Difference]: Start difference. First operand has 477 places, 549 transitions, 7261 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:32:03,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 579 transitions, 9549 flow [2024-06-04 14:32:09,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 579 transitions, 9431 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:32:09,887 INFO L231 Difference]: Finished difference. Result has 478 places, 555 transitions, 7683 flow [2024-06-04 14:32:09,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7143, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7683, PETRI_PLACES=478, PETRI_TRANSITIONS=555} [2024-06-04 14:32:09,889 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 433 predicate places. [2024-06-04 14:32:09,890 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 555 transitions, 7683 flow [2024-06-04 14:32:09,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:09,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:09,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:32:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 14:32:09,890 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:09,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1173835894, now seen corresponding path program 17 times [2024-06-04 14:32:09,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:09,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682144888] [2024-06-04 14:32:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:10,011 INFO 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 14:32:10,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682144888] [2024-06-04 14:32:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682144888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:10,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:10,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604279613] [2024-06-04 14:32:10,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:10,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:10,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:10,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:10,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 555 transitions, 7683 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:10,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:10,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:10,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:32:11,289 INFO L124 PetriNetUnfolderBase]: 2665/4680 cut-off events. [2024-06-04 14:32:11,289 INFO L125 PetriNetUnfolderBase]: For 1074476/1074476 co-relation queries the response was YES. [2024-06-04 14:32:11,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40486 conditions, 4680 events. 2665/4680 cut-off events. For 1074476/1074476 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 32429 event pairs, 477 based on Foata normal form. 1/4670 useless extension candidates. Maximal degree in co-relation 40277. Up to 3722 conditions per place. [2024-06-04 14:32:11,364 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 188 changer transitions 0/583 dead transitions. [2024-06-04 14:32:11,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 583 transitions, 10305 flow [2024-06-04 14:32:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:32:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:32:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:32:11,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:32:11,366 INFO L175 Difference]: Start difference. First operand has 478 places, 555 transitions, 7683 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:32:11,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 583 transitions, 10305 flow [2024-06-04 14:32:17,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 583 transitions, 9707 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-04 14:32:17,784 INFO L231 Difference]: Finished difference. Result has 481 places, 561 transitions, 7633 flow [2024-06-04 14:32:17,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7145, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7633, PETRI_PLACES=481, PETRI_TRANSITIONS=561} [2024-06-04 14:32:17,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 436 predicate places. [2024-06-04 14:32:17,785 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 561 transitions, 7633 flow [2024-06-04 14:32:17,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:17,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:17,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:32:17,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 14:32:17,785 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:17,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1174073044, now seen corresponding path program 18 times [2024-06-04 14:32:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:17,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498413636] [2024-06-04 14:32:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:17,901 INFO 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 14:32:17,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:17,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498413636] [2024-06-04 14:32:17,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498413636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:17,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:17,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:17,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210495906] [2024-06-04 14:32:17,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:17,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:17,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:17,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:17,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 561 transitions, 7633 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:17,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:17,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:17,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:32:19,160 INFO L124 PetriNetUnfolderBase]: 2662/4676 cut-off events. [2024-06-04 14:32:19,160 INFO L125 PetriNetUnfolderBase]: For 1072230/1072230 co-relation queries the response was YES. [2024-06-04 14:32:19,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 4676 events. 2662/4676 cut-off events. For 1072230/1072230 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 32350 event pairs, 477 based on Foata normal form. 1/4666 useless extension candidates. Maximal degree in co-relation 39933. Up to 3719 conditions per place. [2024-06-04 14:32:19,235 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 385 selfloop transitions, 189 changer transitions 0/583 dead transitions. [2024-06-04 14:32:19,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 583 transitions, 10097 flow [2024-06-04 14:32:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:32:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:32:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:32:19,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:32:19,236 INFO L175 Difference]: Start difference. First operand has 481 places, 561 transitions, 7633 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:32:19,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 583 transitions, 10097 flow [2024-06-04 14:32:25,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 583 transitions, 9633 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 14:32:25,338 INFO L231 Difference]: Finished difference. Result has 485 places, 561 transitions, 7553 flow [2024-06-04 14:32:25,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7169, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7553, PETRI_PLACES=485, PETRI_TRANSITIONS=561} [2024-06-04 14:32:25,338 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 440 predicate places. [2024-06-04 14:32:25,339 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 561 transitions, 7553 flow [2024-06-04 14:32:25,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:25,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:25,339 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, 1, 1] [2024-06-04 14:32:25,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 14:32:25,339 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:25,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash 800750972, now seen corresponding path program 19 times [2024-06-04 14:32:25,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:25,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610777350] [2024-06-04 14:32:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:25,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:32:25,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:25,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610777350] [2024-06-04 14:32:25,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610777350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:25,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:25,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:25,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722792203] [2024-06-04 14:32:25,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:25,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:25,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:25,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 561 transitions, 7553 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:25,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:25,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:25,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:32:26,613 INFO L124 PetriNetUnfolderBase]: 2667/4688 cut-off events. [2024-06-04 14:32:26,614 INFO L125 PetriNetUnfolderBase]: For 1082452/1082452 co-relation queries the response was YES. [2024-06-04 14:32:26,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39957 conditions, 4688 events. 2667/4688 cut-off events. For 1082452/1082452 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32510 event pairs, 471 based on Foata normal form. 1/4681 useless extension candidates. Maximal degree in co-relation 39746. Up to 3890 conditions per place. [2024-06-04 14:32:26,844 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 489 selfloop transitions, 94 changer transitions 0/592 dead transitions. [2024-06-04 14:32:26,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 592 transitions, 9165 flow [2024-06-04 14:32:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:32:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:32:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-04 14:32:26,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 14:32:26,845 INFO L175 Difference]: Start difference. First operand has 485 places, 561 transitions, 7553 flow. Second operand 11 states and 264 transitions. [2024-06-04 14:32:26,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 592 transitions, 9165 flow [2024-06-04 14:32:32,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 592 transitions, 8763 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:32:32,680 INFO L231 Difference]: Finished difference. Result has 491 places, 564 transitions, 7419 flow [2024-06-04 14:32:32,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7419, PETRI_PLACES=491, PETRI_TRANSITIONS=564} [2024-06-04 14:32:32,681 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 446 predicate places. [2024-06-04 14:32:32,681 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 564 transitions, 7419 flow [2024-06-04 14:32:32,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:32,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:32,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:32:32,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 14:32:32,681 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:32,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:32,682 INFO L85 PathProgramCache]: Analyzing trace with hash 232655916, now seen corresponding path program 20 times [2024-06-04 14:32:32,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:32,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686856950] [2024-06-04 14:32:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:32,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:32,806 INFO 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 14:32:32,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:32,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686856950] [2024-06-04 14:32:32,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686856950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:32,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:32,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262739656] [2024-06-04 14:32:32,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:32,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:32,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:32,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 564 transitions, 7419 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:32,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:32,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:32,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:32:34,146 INFO L124 PetriNetUnfolderBase]: 2664/4684 cut-off events. [2024-06-04 14:32:34,147 INFO L125 PetriNetUnfolderBase]: For 1081745/1081745 co-relation queries the response was YES. [2024-06-04 14:32:34,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39668 conditions, 4684 events. 2664/4684 cut-off events. For 1081745/1081745 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32465 event pairs, 471 based on Foata normal form. 1/4677 useless extension candidates. Maximal degree in co-relation 39455. Up to 3887 conditions per place. [2024-06-04 14:32:34,225 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 487 selfloop transitions, 92 changer transitions 0/588 dead transitions. [2024-06-04 14:32:34,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 588 transitions, 8955 flow [2024-06-04 14:32:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:32:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:32:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 14:32:34,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-04 14:32:34,226 INFO L175 Difference]: Start difference. First operand has 491 places, 564 transitions, 7419 flow. Second operand 10 states and 244 transitions. [2024-06-04 14:32:34,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 588 transitions, 8955 flow [2024-06-04 14:32:41,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 588 transitions, 8653 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-04 14:32:41,496 INFO L231 Difference]: Finished difference. Result has 491 places, 564 transitions, 7307 flow [2024-06-04 14:32:41,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7307, PETRI_PLACES=491, PETRI_TRANSITIONS=564} [2024-06-04 14:32:41,496 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 446 predicate places. [2024-06-04 14:32:41,496 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 564 transitions, 7307 flow [2024-06-04 14:32:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:41,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:41,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:32:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 14:32:41,497 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:41,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash -343797900, now seen corresponding path program 21 times [2024-06-04 14:32:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:41,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114516550] [2024-06-04 14:32:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:41,629 INFO 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 14:32:41,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:41,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114516550] [2024-06-04 14:32:41,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114516550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:41,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:41,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:41,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128520238] [2024-06-04 14:32:41,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:41,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:41,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:41,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:41,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:41,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:41,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 564 transitions, 7307 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:41,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:41,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:41,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:32:42,914 INFO L124 PetriNetUnfolderBase]: 2661/4680 cut-off events. [2024-06-04 14:32:42,915 INFO L125 PetriNetUnfolderBase]: For 1081371/1081371 co-relation queries the response was YES. [2024-06-04 14:32:42,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39332 conditions, 4680 events. 2661/4680 cut-off events. For 1081371/1081371 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32456 event pairs, 471 based on Foata normal form. 1/4673 useless extension candidates. Maximal degree in co-relation 39119. Up to 3884 conditions per place. [2024-06-04 14:32:43,000 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 482 selfloop transitions, 91 changer transitions 0/582 dead transitions. [2024-06-04 14:32:43,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 582 transitions, 8497 flow [2024-06-04 14:32:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:32:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:32:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:32:43,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-04 14:32:43,001 INFO L175 Difference]: Start difference. First operand has 491 places, 564 transitions, 7307 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:32:43,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 582 transitions, 8497 flow [2024-06-04 14:32:49,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 582 transitions, 8247 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 14:32:49,871 INFO L231 Difference]: Finished difference. Result has 490 places, 564 transitions, 7245 flow [2024-06-04 14:32:49,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7245, PETRI_PLACES=490, PETRI_TRANSITIONS=564} [2024-06-04 14:32:49,872 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 445 predicate places. [2024-06-04 14:32:49,872 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 564 transitions, 7245 flow [2024-06-04 14:32:49,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:49,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:49,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:32:49,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 14:32:49,873 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:49,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -605883242, now seen corresponding path program 22 times [2024-06-04 14:32:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:49,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562980364] [2024-06-04 14:32:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:49,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:50,006 INFO 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 14:32:50,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:50,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562980364] [2024-06-04 14:32:50,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562980364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:50,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:50,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:50,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076830052] [2024-06-04 14:32:50,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:50,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:50,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:50,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:50,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:50,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 564 transitions, 7245 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:50,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:50,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:50,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:32:51,238 INFO L124 PetriNetUnfolderBase]: 2682/4712 cut-off events. [2024-06-04 14:32:51,238 INFO L125 PetriNetUnfolderBase]: For 1121182/1121182 co-relation queries the response was YES. [2024-06-04 14:32:51,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39946 conditions, 4712 events. 2682/4712 cut-off events. For 1121182/1121182 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32704 event pairs, 477 based on Foata normal form. 1/4702 useless extension candidates. Maximal degree in co-relation 39732. Up to 3743 conditions per place. [2024-06-04 14:32:51,323 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 378 selfloop transitions, 204 changer transitions 0/591 dead transitions. [2024-06-04 14:32:51,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 591 transitions, 9603 flow [2024-06-04 14:32:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:32:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:32:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:32:51,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-04 14:32:51,324 INFO L175 Difference]: Start difference. First operand has 490 places, 564 transitions, 7245 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:32:51,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 591 transitions, 9603 flow [2024-06-04 14:32:58,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 591 transitions, 9411 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:32:58,867 INFO L231 Difference]: Finished difference. Result has 490 places, 573 transitions, 7647 flow [2024-06-04 14:32:58,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7647, PETRI_PLACES=490, PETRI_TRANSITIONS=573} [2024-06-04 14:32:58,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 445 predicate places. [2024-06-04 14:32:58,868 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 573 transitions, 7647 flow [2024-06-04 14:32:58,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:58,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:32:58,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:32:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 14:32:58,869 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:32:58,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:32:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash -606062732, now seen corresponding path program 23 times [2024-06-04 14:32:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:32:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089291721] [2024-06-04 14:32:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:32:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:32:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:32:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:32:59,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:32:59,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089291721] [2024-06-04 14:32:59,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089291721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:32:59,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:32:59,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:32:59,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36053314] [2024-06-04 14:32:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:32:59,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:32:59,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:32:59,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:32:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:32:59,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:32:59,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 573 transitions, 7647 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:32:59,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:32:59,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:32:59,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:33:00,159 INFO L124 PetriNetUnfolderBase]: 2679/4708 cut-off events. [2024-06-04 14:33:00,160 INFO L125 PetriNetUnfolderBase]: For 1122122/1122122 co-relation queries the response was YES. [2024-06-04 14:33:00,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40055 conditions, 4708 events. 2679/4708 cut-off events. For 1122122/1122122 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32676 event pairs, 477 based on Foata normal form. 1/4698 useless extension candidates. Maximal degree in co-relation 39840. Up to 3740 conditions per place. [2024-06-04 14:33:00,250 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 375 selfloop transitions, 206 changer transitions 0/590 dead transitions. [2024-06-04 14:33:00,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 590 transitions, 9501 flow [2024-06-04 14:33:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:33:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:33:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 14:33:00,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:33:00,251 INFO L175 Difference]: Start difference. First operand has 490 places, 573 transitions, 7647 flow. Second operand 8 states and 200 transitions. [2024-06-04 14:33:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 590 transitions, 9501 flow [2024-06-04 14:33:06,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 590 transitions, 9120 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-04 14:33:06,769 INFO L231 Difference]: Finished difference. Result has 495 places, 573 transitions, 7684 flow [2024-06-04 14:33:06,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7684, PETRI_PLACES=495, PETRI_TRANSITIONS=573} [2024-06-04 14:33:06,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 450 predicate places. [2024-06-04 14:33:06,769 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 573 transitions, 7684 flow [2024-06-04 14:33:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:06,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:33:06,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:33:06,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 14:33:06,770 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:33:06,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:33:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -952715404, now seen corresponding path program 24 times [2024-06-04 14:33:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:33:06,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546553426] [2024-06-04 14:33:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:33:06,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:33:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:33:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:33:06,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:33:06,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546553426] [2024-06-04 14:33:06,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546553426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:33:06,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:33:06,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:33:06,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040289629] [2024-06-04 14:33:06,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:33:06,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:33:06,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:33:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:33:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:33:06,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:33:06,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 573 transitions, 7684 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:06,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:33:06,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:33:06,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:33:08,028 INFO L124 PetriNetUnfolderBase]: 2676/4704 cut-off events. [2024-06-04 14:33:08,029 INFO L125 PetriNetUnfolderBase]: For 1122773/1122773 co-relation queries the response was YES. [2024-06-04 14:33:08,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39889 conditions, 4704 events. 2676/4704 cut-off events. For 1122773/1122773 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32641 event pairs, 477 based on Foata normal form. 1/4694 useless extension candidates. Maximal degree in co-relation 39673. Up to 3737 conditions per place. [2024-06-04 14:33:08,109 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 210 changer transitions 0/589 dead transitions. [2024-06-04 14:33:08,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 589 transitions, 9210 flow [2024-06-04 14:33:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:33:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:33:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:33:08,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:33:08,111 INFO L175 Difference]: Start difference. First operand has 495 places, 573 transitions, 7684 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:33:08,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 589 transitions, 9210 flow [2024-06-04 14:33:15,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 589 transitions, 8784 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:33:15,782 INFO L231 Difference]: Finished difference. Result has 497 places, 573 transitions, 7684 flow [2024-06-04 14:33:15,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7258, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7684, PETRI_PLACES=497, PETRI_TRANSITIONS=573} [2024-06-04 14:33:15,783 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-04 14:33:15,783 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 573 transitions, 7684 flow [2024-06-04 14:33:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:15,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:33:15,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:33:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 14:33:15,783 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:33:15,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:33:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 722252458, now seen corresponding path program 13 times [2024-06-04 14:33:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:33:15,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172217829] [2024-06-04 14:33:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:33:15,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:33:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:33:15,906 INFO 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 14:33:15,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:33:15,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172217829] [2024-06-04 14:33:15,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172217829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:33:15,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:33:15,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:33:15,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500134422] [2024-06-04 14:33:15,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:33:15,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:33:15,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:33:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:33:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:33:15,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:33:15,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 573 transitions, 7684 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:15,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:33:15,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:33:15,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:33:17,133 INFO L124 PetriNetUnfolderBase]: 2681/4710 cut-off events. [2024-06-04 14:33:17,133 INFO L125 PetriNetUnfolderBase]: For 1135977/1135977 co-relation queries the response was YES. [2024-06-04 14:33:17,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40016 conditions, 4710 events. 2681/4710 cut-off events. For 1135977/1135977 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 32689 event pairs, 486 based on Foata normal form. 1/4697 useless extension candidates. Maximal degree in co-relation 39799. Up to 3816 conditions per place. [2024-06-04 14:33:17,209 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 177 changer transitions 0/599 dead transitions. [2024-06-04 14:33:17,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 599 transitions, 9632 flow [2024-06-04 14:33:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:33:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:33:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:33:17,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:33:17,211 INFO L175 Difference]: Start difference. First operand has 497 places, 573 transitions, 7684 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:33:17,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 599 transitions, 9632 flow [2024-06-04 14:33:24,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 599 transitions, 9162 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 14:33:24,122 INFO L231 Difference]: Finished difference. Result has 496 places, 576 transitions, 7626 flow [2024-06-04 14:33:24,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7214, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7626, PETRI_PLACES=496, PETRI_TRANSITIONS=576} [2024-06-04 14:33:24,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 451 predicate places. [2024-06-04 14:33:24,122 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 576 transitions, 7626 flow [2024-06-04 14:33:24,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:24,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:33:24,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:33:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 14:33:24,123 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:33:24,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:33:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1180495190, now seen corresponding path program 14 times [2024-06-04 14:33:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:33:24,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612341710] [2024-06-04 14:33:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:33:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:33:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:33:24,243 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 14:33:24,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:33:24,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612341710] [2024-06-04 14:33:24,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612341710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:33:24,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:33:24,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:33:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737082147] [2024-06-04 14:33:24,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:33:24,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:33:24,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:33:24,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:33:24,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:33:24,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:33:24,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 576 transitions, 7626 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:24,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:33:24,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:33:24,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:33:25,634 INFO L124 PetriNetUnfolderBase]: 2686/4719 cut-off events. [2024-06-04 14:33:25,634 INFO L125 PetriNetUnfolderBase]: For 1148798/1148798 co-relation queries the response was YES. [2024-06-04 14:33:25,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40040 conditions, 4719 events. 2686/4719 cut-off events. For 1148798/1148798 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 32735 event pairs, 486 based on Foata normal form. 1/4706 useless extension candidates. Maximal degree in co-relation 39823. Up to 3822 conditions per place. [2024-06-04 14:33:25,712 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 418 selfloop transitions, 173 changer transitions 0/600 dead transitions. [2024-06-04 14:33:25,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 600 transitions, 9912 flow [2024-06-04 14:33:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:33:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:33:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:33:25,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:33:25,714 INFO L175 Difference]: Start difference. First operand has 496 places, 576 transitions, 7626 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:33:25,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 600 transitions, 9912 flow [2024-06-04 14:33:33,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 600 transitions, 9362 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 14:33:33,608 INFO L231 Difference]: Finished difference. Result has 497 places, 579 transitions, 7486 flow [2024-06-04 14:33:33,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7096, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7486, PETRI_PLACES=497, PETRI_TRANSITIONS=579} [2024-06-04 14:33:33,608 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-04 14:33:33,608 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 579 transitions, 7486 flow [2024-06-04 14:33:33,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:33,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:33:33,609 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, 1, 1] [2024-06-04 14:33:33,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 14:33:33,609 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:33:33,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:33:33,609 INFO L85 PathProgramCache]: Analyzing trace with hash 253252244, now seen corresponding path program 15 times [2024-06-04 14:33:33,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:33:33,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444438459] [2024-06-04 14:33:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:33:33,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:33:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:33:33,735 INFO 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 14:33:33,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:33:33,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444438459] [2024-06-04 14:33:33,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444438459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:33:33,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:33:33,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:33:33,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299274565] [2024-06-04 14:33:33,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:33:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:33:33,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:33:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:33:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:33:33,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:33:33,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 579 transitions, 7486 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:33,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:33:33,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:33:33,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:33:34,970 INFO L124 PetriNetUnfolderBase]: 2683/4715 cut-off events. [2024-06-04 14:33:34,970 INFO L125 PetriNetUnfolderBase]: For 1146622/1146622 co-relation queries the response was YES. [2024-06-04 14:33:35,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39676 conditions, 4715 events. 2683/4715 cut-off events. For 1146622/1146622 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 32720 event pairs, 486 based on Foata normal form. 1/4702 useless extension candidates. Maximal degree in co-relation 39459. Up to 3819 conditions per place. [2024-06-04 14:33:35,049 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 416 selfloop transitions, 174 changer transitions 0/599 dead transitions. [2024-06-04 14:33:35,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 599 transitions, 9382 flow [2024-06-04 14:33:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:33:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:33:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:33:35,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:33:35,050 INFO L175 Difference]: Start difference. First operand has 497 places, 579 transitions, 7486 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:33:35,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 599 transitions, 9382 flow [2024-06-04 14:33:42,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 599 transitions, 8978 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:33:42,486 INFO L231 Difference]: Finished difference. Result has 500 places, 579 transitions, 7436 flow [2024-06-04 14:33:42,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7436, PETRI_PLACES=500, PETRI_TRANSITIONS=579} [2024-06-04 14:33:42,487 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-04 14:33:42,487 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 579 transitions, 7436 flow [2024-06-04 14:33:42,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:42,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:33:42,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:33:42,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 14:33:42,487 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:33:42,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:33:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -592723308, now seen corresponding path program 16 times [2024-06-04 14:33:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:33:42,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431246367] [2024-06-04 14:33:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:33:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:33:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:33:42,629 INFO 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 14:33:42,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:33:42,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431246367] [2024-06-04 14:33:42,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431246367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:33:42,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:33:42,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:33:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466942594] [2024-06-04 14:33:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:33:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:33:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:33:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:33:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:33:42,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:33:42,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 579 transitions, 7436 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:42,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:33:42,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:33:42,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:33:43,850 INFO L124 PetriNetUnfolderBase]: 2704/4750 cut-off events. [2024-06-04 14:33:43,850 INFO L125 PetriNetUnfolderBase]: For 1188431/1188431 co-relation queries the response was YES. [2024-06-04 14:33:43,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40306 conditions, 4750 events. 2704/4750 cut-off events. For 1188431/1188431 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33067 event pairs, 486 based on Foata normal form. 1/4737 useless extension candidates. Maximal degree in co-relation 40088. Up to 3843 conditions per place. [2024-06-04 14:33:43,926 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 415 selfloop transitions, 182 changer transitions 0/606 dead transitions. [2024-06-04 14:33:43,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 606 transitions, 9848 flow [2024-06-04 14:33:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:33:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:33:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:33:43,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-04 14:33:43,928 INFO L175 Difference]: Start difference. First operand has 500 places, 579 transitions, 7436 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:33:43,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 606 transitions, 9848 flow [2024-06-04 14:33:51,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 606 transitions, 9414 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:33:51,369 INFO L231 Difference]: Finished difference. Result has 500 places, 588 transitions, 7540 flow [2024-06-04 14:33:51,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7020, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7540, PETRI_PLACES=500, PETRI_TRANSITIONS=588} [2024-06-04 14:33:51,369 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-04 14:33:51,369 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 588 transitions, 7540 flow [2024-06-04 14:33:51,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:51,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:33:51,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:33:51,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 14:33:51,370 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:33:51,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:33:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1525724946, now seen corresponding path program 17 times [2024-06-04 14:33:51,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:33:51,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038149187] [2024-06-04 14:33:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:33:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:33:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:33:51,534 INFO 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 14:33:51,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:33:51,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038149187] [2024-06-04 14:33:51,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038149187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:33:51,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:33:51,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:33:51,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474733725] [2024-06-04 14:33:51,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:33:51,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:33:51,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:33:51,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:33:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:33:51,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:33:51,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 588 transitions, 7540 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:33:51,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:33:51,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:33:51,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:33:52,858 INFO L124 PetriNetUnfolderBase]: 2701/4746 cut-off events. [2024-06-04 14:33:52,858 INFO L125 PetriNetUnfolderBase]: For 1187365/1187365 co-relation queries the response was YES. [2024-06-04 14:33:52,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40159 conditions, 4746 events. 2701/4746 cut-off events. For 1187365/1187365 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33006 event pairs, 486 based on Foata normal form. 1/4733 useless extension candidates. Maximal degree in co-relation 39940. Up to 3840 conditions per place. [2024-06-04 14:33:52,934 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 183 changer transitions 0/605 dead transitions. [2024-06-04 14:33:52,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 605 transitions, 9448 flow [2024-06-04 14:33:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:33:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:33:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 14:33:52,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-04 14:33:52,935 INFO L175 Difference]: Start difference. First operand has 500 places, 588 transitions, 7540 flow. Second operand 8 states and 201 transitions. [2024-06-04 14:33:52,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 605 transitions, 9448 flow [2024-06-04 14:34:01,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 605 transitions, 9142 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-04 14:34:01,018 INFO L231 Difference]: Finished difference. Result has 505 places, 588 transitions, 7606 flow [2024-06-04 14:34:01,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7234, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7606, PETRI_PLACES=505, PETRI_TRANSITIONS=588} [2024-06-04 14:34:01,019 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 460 predicate places. [2024-06-04 14:34:01,019 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 588 transitions, 7606 flow [2024-06-04 14:34:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:01,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:01,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:01,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 14:34:01,019 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:34:01,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1165247124, now seen corresponding path program 18 times [2024-06-04 14:34:01,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:01,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556150521] [2024-06-04 14:34:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:01,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:01,152 INFO 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 14:34:01,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:01,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556150521] [2024-06-04 14:34:01,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556150521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:01,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:01,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:34:01,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382148696] [2024-06-04 14:34:01,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:01,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:34:01,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:34:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:34:01,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:34:01,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 588 transitions, 7606 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:01,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:01,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:34:01,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:02,272 INFO L124 PetriNetUnfolderBase]: 2698/4756 cut-off events. [2024-06-04 14:34:02,272 INFO L125 PetriNetUnfolderBase]: For 1186817/1186817 co-relation queries the response was YES. [2024-06-04 14:34:02,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40048 conditions, 4756 events. 2698/4756 cut-off events. For 1186817/1186817 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33068 event pairs, 459 based on Foata normal form. 1/4753 useless extension candidates. Maximal degree in co-relation 39828. Up to 4119 conditions per place. [2024-06-04 14:34:02,491 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 563 selfloop transitions, 31 changer transitions 0/603 dead transitions. [2024-06-04 14:34:02,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 603 transitions, 8830 flow [2024-06-04 14:34:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:34:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:34:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:34:02,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-04 14:34:02,493 INFO L175 Difference]: Start difference. First operand has 505 places, 588 transitions, 7606 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:34:02,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 603 transitions, 8830 flow [2024-06-04 14:34:09,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 603 transitions, 8452 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:34:09,967 INFO L231 Difference]: Finished difference. Result has 507 places, 588 transitions, 7296 flow [2024-06-04 14:34:09,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7228, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7296, PETRI_PLACES=507, PETRI_TRANSITIONS=588} [2024-06-04 14:34:09,967 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-04 14:34:09,968 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 588 transitions, 7296 flow [2024-06-04 14:34:09,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:09,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:09,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 14:34:09,968 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:34:09,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1416310250, now seen corresponding path program 25 times [2024-06-04 14:34:09,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:09,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403791152] [2024-06-04 14:34:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:34:10,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:10,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403791152] [2024-06-04 14:34:10,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403791152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:10,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:10,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:34:10,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360953800] [2024-06-04 14:34:10,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:10,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:34:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:10,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:34:10,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:34:10,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:34:10,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 588 transitions, 7296 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:10,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:10,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:34:10,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:11,270 INFO L124 PetriNetUnfolderBase]: 2703/4737 cut-off events. [2024-06-04 14:34:11,271 INFO L125 PetriNetUnfolderBase]: For 1200025/1200025 co-relation queries the response was YES. [2024-06-04 14:34:11,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39807 conditions, 4737 events. 2703/4737 cut-off events. For 1200025/1200025 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 32999 event pairs, 535 based on Foata normal form. 1/4718 useless extension candidates. Maximal degree in co-relation 39586. Up to 3774 conditions per place. [2024-06-04 14:34:11,353 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 391 selfloop transitions, 206 changer transitions 0/606 dead transitions. [2024-06-04 14:34:11,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 606 transitions, 9607 flow [2024-06-04 14:34:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:34:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:34:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 14:34:11,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:34:11,355 INFO L175 Difference]: Start difference. First operand has 507 places, 588 transitions, 7296 flow. Second operand 8 states and 200 transitions. [2024-06-04 14:34:11,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 606 transitions, 9607 flow [2024-06-04 14:34:21,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 606 transitions, 9517 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:34:21,490 INFO L231 Difference]: Finished difference. Result has 507 places, 591 transitions, 7681 flow [2024-06-04 14:34:21,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7681, PETRI_PLACES=507, PETRI_TRANSITIONS=591} [2024-06-04 14:34:21,490 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-04 14:34:21,490 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 591 transitions, 7681 flow [2024-06-04 14:34:21,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:21,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:21,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 14:34:21,491 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:34:21,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1354231668, now seen corresponding path program 26 times [2024-06-04 14:34:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:21,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297736253] [2024-06-04 14:34:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:21,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:21,617 INFO 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 14:34:21,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297736253] [2024-06-04 14:34:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297736253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:21,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:21,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:34:21,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981119305] [2024-06-04 14:34:21,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:21,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:34:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:34:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:34:21,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:34:21,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 591 transitions, 7681 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:21,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:21,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:34:21,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:22,740 INFO L124 PetriNetUnfolderBase]: 2700/4733 cut-off events. [2024-06-04 14:34:22,740 INFO L125 PetriNetUnfolderBase]: For 1200660/1200660 co-relation queries the response was YES. [2024-06-04 14:34:22,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40079 conditions, 4733 events. 2700/4733 cut-off events. For 1200660/1200660 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 32975 event pairs, 535 based on Foata normal form. 1/4714 useless extension candidates. Maximal degree in co-relation 39857. Up to 3771 conditions per place. [2024-06-04 14:34:22,819 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 207 changer transitions 0/605 dead transitions. [2024-06-04 14:34:22,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 605 transitions, 9593 flow [2024-06-04 14:34:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:34:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:34:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 14:34:22,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:34:22,821 INFO L175 Difference]: Start difference. First operand has 507 places, 591 transitions, 7681 flow. Second operand 8 states and 198 transitions. [2024-06-04 14:34:22,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 605 transitions, 9593 flow [2024-06-04 14:34:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 605 transitions, 8975 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 14:34:30,999 INFO L231 Difference]: Finished difference. Result has 509 places, 591 transitions, 7483 flow [2024-06-04 14:34:31,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7063, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7483, PETRI_PLACES=509, PETRI_TRANSITIONS=591} [2024-06-04 14:34:31,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 464 predicate places. [2024-06-04 14:34:31,000 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 591 transitions, 7483 flow [2024-06-04 14:34:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:31,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:31,000 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, 1, 1] [2024-06-04 14:34:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 14:34:31,001 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:34:31,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1216239756, now seen corresponding path program 27 times [2024-06-04 14:34:31,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:31,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246735689] [2024-06-04 14:34:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:31,138 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 14:34:31,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:31,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246735689] [2024-06-04 14:34:31,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246735689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:31,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:31,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:34:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685965009] [2024-06-04 14:34:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:31,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:34:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:34:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:34:31,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:34:31,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 591 transitions, 7483 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:31,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:31,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:34:31,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:32,376 INFO L124 PetriNetUnfolderBase]: 2713/4755 cut-off events. [2024-06-04 14:34:32,376 INFO L125 PetriNetUnfolderBase]: For 1226740/1226740 co-relation queries the response was YES. [2024-06-04 14:34:32,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40358 conditions, 4755 events. 2713/4755 cut-off events. For 1226740/1226740 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33115 event pairs, 535 based on Foata normal form. 1/4736 useless extension candidates. Maximal degree in co-relation 40135. Up to 3786 conditions per place. [2024-06-04 14:34:32,455 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 391 selfloop transitions, 212 changer transitions 0/612 dead transitions. [2024-06-04 14:34:32,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 612 transitions, 9879 flow [2024-06-04 14:34:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:34:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:34:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 14:34:32,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:34:32,456 INFO L175 Difference]: Start difference. First operand has 509 places, 591 transitions, 7483 flow. Second operand 8 states and 200 transitions. [2024-06-04 14:34:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 612 transitions, 9879 flow [2024-06-04 14:34:41,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 612 transitions, 9449 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:34:41,462 INFO L231 Difference]: Finished difference. Result has 511 places, 597 transitions, 7601 flow [2024-06-04 14:34:41,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7065, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7601, PETRI_PLACES=511, PETRI_TRANSITIONS=597} [2024-06-04 14:34:41,463 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 466 predicate places. [2024-06-04 14:34:41,463 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 597 transitions, 7601 flow [2024-06-04 14:34:41,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:41,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:41,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:41,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 14:34:41,464 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:34:41,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1222905996, now seen corresponding path program 28 times [2024-06-04 14:34:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:41,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772613443] [2024-06-04 14:34:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:41,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:34:41,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:41,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772613443] [2024-06-04 14:34:41,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772613443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:41,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:41,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:34:41,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908223818] [2024-06-04 14:34:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:41,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:34:41,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:34:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:34:41,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:34:41,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 597 transitions, 7601 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:41,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:41,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:34:41,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:42,726 INFO L124 PetriNetUnfolderBase]: 2710/4751 cut-off events. [2024-06-04 14:34:42,726 INFO L125 PetriNetUnfolderBase]: For 1225148/1225148 co-relation queries the response was YES. [2024-06-04 14:34:42,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40226 conditions, 4751 events. 2710/4751 cut-off events. For 1225148/1225148 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33112 event pairs, 535 based on Foata normal form. 1/4732 useless extension candidates. Maximal degree in co-relation 40002. Up to 3783 conditions per place. [2024-06-04 14:34:42,808 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 213 changer transitions 0/611 dead transitions. [2024-06-04 14:34:42,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 611 transitions, 9533 flow [2024-06-04 14:34:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:34:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:34:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 14:34:42,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:34:42,810 INFO L175 Difference]: Start difference. First operand has 511 places, 597 transitions, 7601 flow. Second operand 8 states and 198 transitions. [2024-06-04 14:34:42,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 611 transitions, 9533 flow [2024-06-04 14:34:51,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 611 transitions, 8861 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 14:34:51,164 INFO L231 Difference]: Finished difference. Result has 512 places, 597 transitions, 7361 flow [2024-06-04 14:34:51,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7361, PETRI_PLACES=512, PETRI_TRANSITIONS=597} [2024-06-04 14:34:51,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 467 predicate places. [2024-06-04 14:34:51,164 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 597 transitions, 7361 flow [2024-06-04 14:34:51,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:51,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:34:51,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:34:51,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 14:34:51,165 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:34:51,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:34:51,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1569558668, now seen corresponding path program 29 times [2024-06-04 14:34:51,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:34:51,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349654520] [2024-06-04 14:34:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:34:51,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:34:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:34:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:34:51,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:34:51,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349654520] [2024-06-04 14:34:51,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349654520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:34:51,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:34:51,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:34:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660425768] [2024-06-04 14:34:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:34:51,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:34:51,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:34:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:34:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:34:51,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:34:51,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 597 transitions, 7361 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:34:51,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:34:51,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:34:51,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:34:52,422 INFO L124 PetriNetUnfolderBase]: 2707/4747 cut-off events. [2024-06-04 14:34:52,422 INFO L125 PetriNetUnfolderBase]: For 1220790/1220790 co-relation queries the response was YES. [2024-06-04 14:34:52,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39994 conditions, 4747 events. 2707/4747 cut-off events. For 1220790/1220790 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33104 event pairs, 535 based on Foata normal form. 1/4728 useless extension candidates. Maximal degree in co-relation 39769. Up to 3780 conditions per place. [2024-06-04 14:34:52,511 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 382 selfloop transitions, 219 changer transitions 0/610 dead transitions. [2024-06-04 14:34:52,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 610 transitions, 8943 flow [2024-06-04 14:34:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:34:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:34:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:34:52,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-04 14:34:52,512 INFO L175 Difference]: Start difference. First operand has 512 places, 597 transitions, 7361 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:34:52,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 610 transitions, 8943 flow [2024-06-04 14:35:02,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 610 transitions, 8435 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 14:35:02,010 INFO L231 Difference]: Finished difference. Result has 513 places, 597 transitions, 7297 flow [2024-06-04 14:35:02,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6853, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7297, PETRI_PLACES=513, PETRI_TRANSITIONS=597} [2024-06-04 14:35:02,010 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 468 predicate places. [2024-06-04 14:35:02,011 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 597 transitions, 7297 flow [2024-06-04 14:35:02,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:02,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:02,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:02,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 14:35:02,011 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:35:02,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1066635124, now seen corresponding path program 30 times [2024-06-04 14:35:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:02,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371361781] [2024-06-04 14:35:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:02,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:02,142 INFO 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 14:35:02,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:02,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371361781] [2024-06-04 14:35:02,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371361781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:02,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:02,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749089819] [2024-06-04 14:35:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:02,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:35:02,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 597 transitions, 7297 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:02,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:02,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:35:02,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:03,429 INFO L124 PetriNetUnfolderBase]: 2704/4763 cut-off events. [2024-06-04 14:35:03,429 INFO L125 PetriNetUnfolderBase]: For 1217485/1217485 co-relation queries the response was YES. [2024-06-04 14:35:03,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39847 conditions, 4763 events. 2704/4763 cut-off events. For 1217485/1217485 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33210 event pairs, 471 based on Foata normal form. 1/4756 useless extension candidates. Maximal degree in co-relation 39621. Up to 4110 conditions per place. [2024-06-04 14:35:03,512 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 569 selfloop transitions, 31 changer transitions 0/609 dead transitions. [2024-06-04 14:35:03,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 609 transitions, 8525 flow [2024-06-04 14:35:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 14:35:03,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-04 14:35:03,513 INFO L175 Difference]: Start difference. First operand has 513 places, 597 transitions, 7297 flow. Second operand 8 states and 187 transitions. [2024-06-04 14:35:03,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 609 transitions, 8525 flow [2024-06-04 14:35:13,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 609 transitions, 8041 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 14:35:13,471 INFO L231 Difference]: Finished difference. Result has 513 places, 597 transitions, 6881 flow [2024-06-04 14:35:13,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6881, PETRI_PLACES=513, PETRI_TRANSITIONS=597} [2024-06-04 14:35:13,472 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 468 predicate places. [2024-06-04 14:35:13,472 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 597 transitions, 6881 flow [2024-06-04 14:35:13,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:13,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:13,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 14:35:13,472 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:35:13,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -779682442, now seen corresponding path program 19 times [2024-06-04 14:35:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289984872] [2024-06-04 14:35:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:35:13,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:13,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289984872] [2024-06-04 14:35:13,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289984872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:13,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:13,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:13,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651432215] [2024-06-04 14:35:13,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:13,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:13,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:13,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:35:13,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 597 transitions, 6881 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:13,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:13,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:35:13,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:14,881 INFO L124 PetriNetUnfolderBase]: 2709/4779 cut-off events. [2024-06-04 14:35:14,881 INFO L125 PetriNetUnfolderBase]: For 1229540/1229540 co-relation queries the response was YES. [2024-06-04 14:35:14,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39532 conditions, 4779 events. 2709/4779 cut-off events. For 1229540/1229540 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 33334 event pairs, 461 based on Foata normal form. 1/4776 useless extension candidates. Maximal degree in co-relation 39305. Up to 4135 conditions per place. [2024-06-04 14:35:14,959 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 572 selfloop transitions, 31 changer transitions 0/612 dead transitions. [2024-06-04 14:35:14,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 612 transitions, 8168 flow [2024-06-04 14:35:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 14:35:14,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-04 14:35:14,960 INFO L175 Difference]: Start difference. First operand has 513 places, 597 transitions, 6881 flow. Second operand 8 states and 187 transitions. [2024-06-04 14:35:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 612 transitions, 8168 flow [2024-06-04 14:35:23,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 612 transitions, 8068 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 14:35:23,439 INFO L231 Difference]: Finished difference. Result has 512 places, 600 transitions, 6908 flow [2024-06-04 14:35:23,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6781, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6908, PETRI_PLACES=512, PETRI_TRANSITIONS=600} [2024-06-04 14:35:23,440 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 467 predicate places. [2024-06-04 14:35:23,440 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 600 transitions, 6908 flow [2024-06-04 14:35:23,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:23,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:23,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:23,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 14:35:23,440 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:35:23,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1007585940, now seen corresponding path program 20 times [2024-06-04 14:35:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102824832] [2024-06-04 14:35:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:23,571 INFO 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 14:35:23,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:23,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102824832] [2024-06-04 14:35:23,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102824832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:23,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:23,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:23,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258814775] [2024-06-04 14:35:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:23,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:23,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:23,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:23,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:35:23,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 600 transitions, 6908 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:23,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:23,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:35:23,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:24,681 INFO L124 PetriNetUnfolderBase]: 2746/4822 cut-off events. [2024-06-04 14:35:24,681 INFO L125 PetriNetUnfolderBase]: For 1308126/1308126 co-relation queries the response was YES. [2024-06-04 14:35:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40685 conditions, 4822 events. 2746/4822 cut-off events. For 1308126/1308126 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 33671 event pairs, 495 based on Foata normal form. 1/4809 useless extension candidates. Maximal degree in co-relation 40457. Up to 3894 conditions per place. [2024-06-04 14:35:24,765 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 422 selfloop transitions, 199 changer transitions 0/630 dead transitions. [2024-06-04 14:35:24,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 630 transitions, 9523 flow [2024-06-04 14:35:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:35:24,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:35:24,767 INFO L175 Difference]: Start difference. First operand has 512 places, 600 transitions, 6908 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:35:24,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 630 transitions, 9523 flow [2024-06-04 14:35:34,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 630 transitions, 9433 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:35:34,768 INFO L231 Difference]: Finished difference. Result has 514 places, 615 transitions, 7493 flow [2024-06-04 14:35:34,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6818, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7493, PETRI_PLACES=514, PETRI_TRANSITIONS=615} [2024-06-04 14:35:34,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 469 predicate places. [2024-06-04 14:35:34,769 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 615 transitions, 7493 flow [2024-06-04 14:35:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:34,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:34,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 14:35:34,769 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:35:34,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 240361010, now seen corresponding path program 21 times [2024-06-04 14:35:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:34,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825805960] [2024-06-04 14:35:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:34,902 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 14:35:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:34,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825805960] [2024-06-04 14:35:34,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825805960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:34,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:34,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264506964] [2024-06-04 14:35:34,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:34,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:34,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:35:34,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 615 transitions, 7493 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:34,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:34,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:35:34,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:36,088 INFO L124 PetriNetUnfolderBase]: 2756/4851 cut-off events. [2024-06-04 14:35:36,088 INFO L125 PetriNetUnfolderBase]: For 1323424/1323424 co-relation queries the response was YES. [2024-06-04 14:35:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41250 conditions, 4851 events. 2756/4851 cut-off events. For 1323424/1323424 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 33932 event pairs, 471 based on Foata normal form. 1/4844 useless extension candidates. Maximal degree in co-relation 41021. Up to 4155 conditions per place. [2024-06-04 14:35:36,181 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 573 selfloop transitions, 51 changer transitions 0/633 dead transitions. [2024-06-04 14:35:36,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 633 transitions, 8872 flow [2024-06-04 14:35:36,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:35:36,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-04 14:35:36,182 INFO L175 Difference]: Start difference. First operand has 514 places, 615 transitions, 7493 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:35:36,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 633 transitions, 8872 flow [2024-06-04 14:35:45,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 633 transitions, 8368 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-04 14:35:45,983 INFO L231 Difference]: Finished difference. Result has 518 places, 621 transitions, 7206 flow [2024-06-04 14:35:45,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7206, PETRI_PLACES=518, PETRI_TRANSITIONS=621} [2024-06-04 14:35:45,983 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 473 predicate places. [2024-06-04 14:35:45,983 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 621 transitions, 7206 flow [2024-06-04 14:35:45,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:45,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:45,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:45,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 14:35:45,984 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:35:45,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1209566572, now seen corresponding path program 22 times [2024-06-04 14:35:45,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:45,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822578412] [2024-06-04 14:35:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:45,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:46,108 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 14:35:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:46,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822578412] [2024-06-04 14:35:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822578412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:46,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:46,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:46,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123308663] [2024-06-04 14:35:46,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:46,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:46,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:46,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:35:46,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 621 transitions, 7206 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:46,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:46,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:35:46,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:47,379 INFO L124 PetriNetUnfolderBase]: 2761/4849 cut-off events. [2024-06-04 14:35:47,379 INFO L125 PetriNetUnfolderBase]: For 1335580/1335580 co-relation queries the response was YES. [2024-06-04 14:35:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40918 conditions, 4849 events. 2761/4849 cut-off events. For 1335580/1335580 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 33974 event pairs, 495 based on Foata normal form. 1/4836 useless extension candidates. Maximal degree in co-relation 40688. Up to 3910 conditions per place. [2024-06-04 14:35:47,464 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 420 selfloop transitions, 210 changer transitions 0/639 dead transitions. [2024-06-04 14:35:47,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 639 transitions, 9627 flow [2024-06-04 14:35:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:35:47,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:35:47,465 INFO L175 Difference]: Start difference. First operand has 518 places, 621 transitions, 7206 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:35:47,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 639 transitions, 9627 flow [2024-06-04 14:35:58,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 639 transitions, 9513 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:35:58,453 INFO L231 Difference]: Finished difference. Result has 521 places, 624 transitions, 7565 flow [2024-06-04 14:35:58,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7092, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7565, PETRI_PLACES=521, PETRI_TRANSITIONS=624} [2024-06-04 14:35:58,454 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 476 predicate places. [2024-06-04 14:35:58,454 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 624 transitions, 7565 flow [2024-06-04 14:35:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:58,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:35:58,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:35:58,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 14:35:58,455 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:35:58,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:35:58,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1222899052, now seen corresponding path program 23 times [2024-06-04 14:35:58,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:35:58,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219927205] [2024-06-04 14:35:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:35:58,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:35:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:35:58,582 INFO 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 14:35:58,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:35:58,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219927205] [2024-06-04 14:35:58,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219927205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:35:58,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:35:58,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:35:58,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703466382] [2024-06-04 14:35:58,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:35:58,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:35:58,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:35:58,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:35:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:35:58,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:35:58,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 624 transitions, 7565 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:35:58,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:35:58,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:35:58,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:35:59,740 INFO L124 PetriNetUnfolderBase]: 2758/4845 cut-off events. [2024-06-04 14:35:59,740 INFO L125 PetriNetUnfolderBase]: For 1335117/1335117 co-relation queries the response was YES. [2024-06-04 14:35:59,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41139 conditions, 4845 events. 2758/4845 cut-off events. For 1335117/1335117 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 33918 event pairs, 495 based on Foata normal form. 1/4832 useless extension candidates. Maximal degree in co-relation 40908. Up to 3907 conditions per place. [2024-06-04 14:35:59,982 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 417 selfloop transitions, 212 changer transitions 0/638 dead transitions. [2024-06-04 14:35:59,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 638 transitions, 9579 flow [2024-06-04 14:35:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:35:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:35:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:35:59,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-04 14:35:59,983 INFO L175 Difference]: Start difference. First operand has 521 places, 624 transitions, 7565 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:35:59,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 638 transitions, 9579 flow [2024-06-04 14:36:09,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 638 transitions, 9053 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:09,183 INFO L231 Difference]: Finished difference. Result has 524 places, 624 transitions, 7469 flow [2024-06-04 14:36:09,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7469, PETRI_PLACES=524, PETRI_TRANSITIONS=624} [2024-06-04 14:36:09,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 479 predicate places. [2024-06-04 14:36:09,184 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 624 transitions, 7469 flow [2024-06-04 14:36:09,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:09,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:09,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:09,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 14:36:09,185 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:36:09,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:09,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1192572106, now seen corresponding path program 24 times [2024-06-04 14:36:09,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:09,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018816021] [2024-06-04 14:36:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:09,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:09,309 INFO 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 14:36:09,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018816021] [2024-06-04 14:36:09,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018816021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:09,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:09,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697929109] [2024-06-04 14:36:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:09,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:09,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:09,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:36:09,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 624 transitions, 7469 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:09,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:09,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:36:09,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:10,501 INFO L124 PetriNetUnfolderBase]: 2763/4854 cut-off events. [2024-06-04 14:36:10,502 INFO L125 PetriNetUnfolderBase]: For 1348319/1348319 co-relation queries the response was YES. [2024-06-04 14:36:10,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41206 conditions, 4854 events. 2763/4854 cut-off events. For 1348319/1348319 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33996 event pairs, 495 based on Foata normal form. 1/4841 useless extension candidates. Maximal degree in co-relation 40974. Up to 3913 conditions per place. [2024-06-04 14:36:10,594 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 423 selfloop transitions, 210 changer transitions 0/642 dead transitions. [2024-06-04 14:36:10,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 642 transitions, 9908 flow [2024-06-04 14:36:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:36:10,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:36:10,596 INFO L175 Difference]: Start difference. First operand has 524 places, 624 transitions, 7469 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:36:10,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 642 transitions, 9908 flow [2024-06-04 14:36:21,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 642 transitions, 9432 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:36:21,336 INFO L231 Difference]: Finished difference. Result has 524 places, 627 transitions, 7466 flow [2024-06-04 14:36:21,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6999, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7466, PETRI_PLACES=524, PETRI_TRANSITIONS=627} [2024-06-04 14:36:21,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 479 predicate places. [2024-06-04 14:36:21,336 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 627 transitions, 7466 flow [2024-06-04 14:36:21,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:21,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:21,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 14:36:21,337 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:36:21,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1360904852, now seen corresponding path program 25 times [2024-06-04 14:36:21,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:21,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555976276] [2024-06-04 14:36:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:21,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:21,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555976276] [2024-06-04 14:36:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555976276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:21,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:21,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:21,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053248142] [2024-06-04 14:36:21,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:21,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:21,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:21,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:21,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:21,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:36:21,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 627 transitions, 7466 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:21,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:21,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:36:21,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:22,678 INFO L124 PetriNetUnfolderBase]: 2760/4850 cut-off events. [2024-06-04 14:36:22,679 INFO L125 PetriNetUnfolderBase]: For 1345489/1345489 co-relation queries the response was YES. [2024-06-04 14:36:22,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41047 conditions, 4850 events. 2760/4850 cut-off events. For 1345489/1345489 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33984 event pairs, 495 based on Foata normal form. 1/4837 useless extension candidates. Maximal degree in co-relation 40814. Up to 3910 conditions per place. [2024-06-04 14:36:22,762 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 424 selfloop transitions, 209 changer transitions 0/642 dead transitions. [2024-06-04 14:36:22,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 642 transitions, 9864 flow [2024-06-04 14:36:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:36:22,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-04 14:36:22,764 INFO L175 Difference]: Start difference. First operand has 524 places, 627 transitions, 7466 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:36:22,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 642 transitions, 9864 flow [2024-06-04 14:36:32,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 642 transitions, 9182 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 14:36:32,516 INFO L231 Difference]: Finished difference. Result has 524 places, 627 transitions, 7208 flow [2024-06-04 14:36:32,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6784, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7208, PETRI_PLACES=524, PETRI_TRANSITIONS=627} [2024-06-04 14:36:32,516 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 479 predicate places. [2024-06-04 14:36:32,516 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 627 transitions, 7208 flow [2024-06-04 14:36:32,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:32,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:32,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:32,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 14:36:32,517 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:36:32,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash 716534070, now seen corresponding path program 26 times [2024-06-04 14:36:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476195566] [2024-06-04 14:36:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:32,645 INFO 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 14:36:32,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:32,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476195566] [2024-06-04 14:36:32,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476195566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:32,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:32,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:32,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645595020] [2024-06-04 14:36:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:32,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:36:32,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 627 transitions, 7208 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:32,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:32,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:36:32,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:33,834 INFO L124 PetriNetUnfolderBase]: 2757/4857 cut-off events. [2024-06-04 14:36:33,834 INFO L125 PetriNetUnfolderBase]: For 1340900/1340900 co-relation queries the response was YES. [2024-06-04 14:36:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40716 conditions, 4857 events. 2757/4857 cut-off events. For 1340900/1340900 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34067 event pairs, 471 based on Foata normal form. 1/4850 useless extension candidates. Maximal degree in co-relation 40483. Up to 4143 conditions per place. [2024-06-04 14:36:33,926 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 568 selfloop transitions, 63 changer transitions 0/640 dead transitions. [2024-06-04 14:36:33,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 640 transitions, 8868 flow [2024-06-04 14:36:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:36:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:36:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 14:36:33,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 14:36:33,927 INFO L175 Difference]: Start difference. First operand has 524 places, 627 transitions, 7208 flow. Second operand 8 states and 192 transitions. [2024-06-04 14:36:33,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 640 transitions, 8868 flow [2024-06-04 14:36:45,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 640 transitions, 8418 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 14:36:45,282 INFO L231 Difference]: Finished difference. Result has 527 places, 627 transitions, 6890 flow [2024-06-04 14:36:45,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6890, PETRI_PLACES=527, PETRI_TRANSITIONS=627} [2024-06-04 14:36:45,283 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 482 predicate places. [2024-06-04 14:36:45,283 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 627 transitions, 6890 flow [2024-06-04 14:36:45,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:45,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:45,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:45,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 14:36:45,284 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:36:45,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1576606262, now seen corresponding path program 27 times [2024-06-04 14:36:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:45,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169156436] [2024-06-04 14:36:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:36:45,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:45,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169156436] [2024-06-04 14:36:45,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169156436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:45,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:45,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:45,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52800271] [2024-06-04 14:36:45,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:45,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:45,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:45,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:36:45,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 627 transitions, 6890 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:45,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:45,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:36:45,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:36:46,645 INFO L124 PetriNetUnfolderBase]: 2754/4853 cut-off events. [2024-06-04 14:36:46,645 INFO L125 PetriNetUnfolderBase]: For 1336997/1336997 co-relation queries the response was YES. [2024-06-04 14:36:46,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40238 conditions, 4853 events. 2754/4853 cut-off events. For 1336997/1336997 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33997 event pairs, 471 based on Foata normal form. 1/4846 useless extension candidates. Maximal degree in co-relation 40004. Up to 4140 conditions per place. [2024-06-04 14:36:46,726 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 569 selfloop transitions, 64 changer transitions 0/642 dead transitions. [2024-06-04 14:36:46,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 642 transitions, 8560 flow [2024-06-04 14:36:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:36:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:36:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-04 14:36:46,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-04 14:36:46,727 INFO L175 Difference]: Start difference. First operand has 527 places, 627 transitions, 6890 flow. Second operand 10 states and 232 transitions. [2024-06-04 14:36:46,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 642 transitions, 8560 flow [2024-06-04 14:36:58,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 642 transitions, 8276 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 14:36:58,891 INFO L231 Difference]: Finished difference. Result has 528 places, 627 transitions, 6740 flow [2024-06-04 14:36:58,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6740, PETRI_PLACES=528, PETRI_TRANSITIONS=627} [2024-06-04 14:36:58,892 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 483 predicate places. [2024-06-04 14:36:58,892 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 627 transitions, 6740 flow [2024-06-04 14:36:58,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:58,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:58,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:36:58,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 14:36:58,892 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:36:58,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1799943532, now seen corresponding path program 28 times [2024-06-04 14:36:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:58,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100618484] [2024-06-04 14:36:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:36:59,005 INFO 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 14:36:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:36:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100618484] [2024-06-04 14:36:59,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100618484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:36:59,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:36:59,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:36:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179973789] [2024-06-04 14:36:59,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:36:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:36:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:36:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:36:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:36:59,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:36:59,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 627 transitions, 6740 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:36:59,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:36:59,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:36:59,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:00,218 INFO L124 PetriNetUnfolderBase]: 2751/4856 cut-off events. [2024-06-04 14:37:00,218 INFO L125 PetriNetUnfolderBase]: For 1332839/1332839 co-relation queries the response was YES. [2024-06-04 14:37:00,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40039 conditions, 4856 events. 2751/4856 cut-off events. For 1332839/1332839 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34045 event pairs, 461 based on Foata normal form. 1/4853 useless extension candidates. Maximal degree in co-relation 39804. Up to 4165 conditions per place. [2024-06-04 14:37:00,536 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 578 selfloop transitions, 54 changer transitions 0/641 dead transitions. [2024-06-04 14:37:00,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 641 transitions, 8780 flow [2024-06-04 14:37:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:37:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:37:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:37:00,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-04 14:37:00,537 INFO L175 Difference]: Start difference. First operand has 528 places, 627 transitions, 6740 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:37:00,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 641 transitions, 8780 flow [2024-06-04 14:37:10,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 641 transitions, 8616 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 14:37:10,513 INFO L231 Difference]: Finished difference. Result has 528 places, 627 transitions, 6690 flow [2024-06-04 14:37:10,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6690, PETRI_PLACES=528, PETRI_TRANSITIONS=627} [2024-06-04 14:37:10,514 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 483 predicate places. [2024-06-04 14:37:10,514 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 627 transitions, 6690 flow [2024-06-04 14:37:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:10,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:10,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:10,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 14:37:10,514 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:10,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:10,515 INFO L85 PathProgramCache]: Analyzing trace with hash 311345812, now seen corresponding path program 29 times [2024-06-04 14:37:10,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:10,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347861993] [2024-06-04 14:37:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:10,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:10,627 INFO 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 14:37:10,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:10,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347861993] [2024-06-04 14:37:10,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347861993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:10,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:10,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:10,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958518824] [2024-06-04 14:37:10,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:10,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:10,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:10,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:37:10,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 627 transitions, 6690 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:10,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:10,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:37:10,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:11,792 INFO L124 PetriNetUnfolderBase]: 2748/4852 cut-off events. [2024-06-04 14:37:11,792 INFO L125 PetriNetUnfolderBase]: For 1329080/1329080 co-relation queries the response was YES. [2024-06-04 14:37:12,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39852 conditions, 4852 events. 2748/4852 cut-off events. For 1329080/1329080 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34010 event pairs, 461 based on Foata normal form. 1/4849 useless extension candidates. Maximal degree in co-relation 39616. Up to 4162 conditions per place. [2024-06-04 14:37:12,039 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 578 selfloop transitions, 55 changer transitions 0/642 dead transitions. [2024-06-04 14:37:12,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 642 transitions, 8364 flow [2024-06-04 14:37:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:37:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:37:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 14:37:12,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-04 14:37:12,040 INFO L175 Difference]: Start difference. First operand has 528 places, 627 transitions, 6690 flow. Second operand 10 states and 230 transitions. [2024-06-04 14:37:12,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 642 transitions, 8364 flow [2024-06-04 14:37:22,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 642 transitions, 8144 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 14:37:22,068 INFO L231 Difference]: Finished difference. Result has 531 places, 627 transitions, 6586 flow [2024-06-04 14:37:22,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6470, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6586, PETRI_PLACES=531, PETRI_TRANSITIONS=627} [2024-06-04 14:37:22,068 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 486 predicate places. [2024-06-04 14:37:22,068 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 627 transitions, 6586 flow [2024-06-04 14:37:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:22,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:22,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:22,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 14:37:22,069 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:22,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1804705132, now seen corresponding path program 30 times [2024-06-04 14:37:22,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:22,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696786231] [2024-06-04 14:37:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:22,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:22,190 INFO 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 14:37:22,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:22,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696786231] [2024-06-04 14:37:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696786231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:22,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:22,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:22,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174441158] [2024-06-04 14:37:22,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:22,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:22,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:22,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:37:22,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 627 transitions, 6586 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:22,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:22,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:37:22,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:23,432 INFO L124 PetriNetUnfolderBase]: 2745/4851 cut-off events. [2024-06-04 14:37:23,433 INFO L125 PetriNetUnfolderBase]: For 1324565/1324565 co-relation queries the response was YES. [2024-06-04 14:37:23,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39656 conditions, 4851 events. 2745/4851 cut-off events. For 1324565/1324565 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34016 event pairs, 457 based on Foata normal form. 1/4850 useless extension candidates. Maximal degree in co-relation 39419. Up to 4207 conditions per place. [2024-06-04 14:37:23,517 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 611 selfloop transitions, 19 changer transitions 0/639 dead transitions. [2024-06-04 14:37:23,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 639 transitions, 7874 flow [2024-06-04 14:37:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:37:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:37:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 14:37:23,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198863636363636 [2024-06-04 14:37:23,518 INFO L175 Difference]: Start difference. First operand has 531 places, 627 transitions, 6586 flow. Second operand 8 states and 183 transitions. [2024-06-04 14:37:23,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 639 transitions, 7874 flow [2024-06-04 14:37:33,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 639 transitions, 7636 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-04 14:37:33,317 INFO L231 Difference]: Finished difference. Result has 527 places, 627 transitions, 6392 flow [2024-06-04 14:37:33,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6348, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6392, PETRI_PLACES=527, PETRI_TRANSITIONS=627} [2024-06-04 14:37:33,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 482 predicate places. [2024-06-04 14:37:33,318 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 627 transitions, 6392 flow [2024-06-04 14:37:33,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:33,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:33,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:33,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 14:37:33,319 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:33,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1192088816, now seen corresponding path program 4 times [2024-06-04 14:37:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:33,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063429260] [2024-06-04 14:37:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:33,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:33,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063429260] [2024-06-04 14:37:33,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063429260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:33,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:33,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:33,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658958290] [2024-06-04 14:37:33,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:33,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:33,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:33,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:33,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:37:33,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 627 transitions, 6392 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:33,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:33,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:37:33,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:34,888 INFO L124 PetriNetUnfolderBase]: 2732/4820 cut-off events. [2024-06-04 14:37:34,888 INFO L125 PetriNetUnfolderBase]: For 1316453/1316453 co-relation queries the response was YES. [2024-06-04 14:37:34,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37883 conditions, 4820 events. 2732/4820 cut-off events. For 1316453/1316453 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33814 event pairs, 456 based on Foata normal form. 6/4818 useless extension candidates. Maximal degree in co-relation 37646. Up to 4027 conditions per place. [2024-06-04 14:37:34,982 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 584 selfloop transitions, 53 changer transitions 0/646 dead transitions. [2024-06-04 14:37:34,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 646 transitions, 7764 flow [2024-06-04 14:37:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:37:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:37:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 14:37:34,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-04 14:37:34,983 INFO L175 Difference]: Start difference. First operand has 527 places, 627 transitions, 6392 flow. Second operand 8 states and 194 transitions. [2024-06-04 14:37:34,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 646 transitions, 7764 flow [2024-06-04 14:37:44,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 646 transitions, 7682 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 14:37:44,532 INFO L231 Difference]: Finished difference. Result has 526 places, 627 transitions, 6420 flow [2024-06-04 14:37:44,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6310, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6420, PETRI_PLACES=526, PETRI_TRANSITIONS=627} [2024-06-04 14:37:44,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 481 predicate places. [2024-06-04 14:37:44,533 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 627 transitions, 6420 flow [2024-06-04 14:37:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:44,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:44,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:44,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 14:37:44,533 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:44,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:44,533 INFO L85 PathProgramCache]: Analyzing trace with hash -37199276, now seen corresponding path program 5 times [2024-06-04 14:37:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:44,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421690838] [2024-06-04 14:37:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:44,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:44,687 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 14:37:44,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:44,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421690838] [2024-06-04 14:37:44,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421690838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:44,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:44,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:44,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427995379] [2024-06-04 14:37:44,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:44,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:44,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:37:44,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 627 transitions, 6420 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:44,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:44,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:37:44,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:46,062 INFO L124 PetriNetUnfolderBase]: 2753/4853 cut-off events. [2024-06-04 14:37:46,062 INFO L125 PetriNetUnfolderBase]: For 1296994/1296994 co-relation queries the response was YES. [2024-06-04 14:37:46,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38798 conditions, 4853 events. 2753/4853 cut-off events. For 1296994/1296994 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 33985 event pairs, 451 based on Foata normal form. 2/4850 useless extension candidates. Maximal degree in co-relation 38560. Up to 4118 conditions per place. [2024-06-04 14:37:46,142 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 616 selfloop transitions, 34 changer transitions 0/659 dead transitions. [2024-06-04 14:37:46,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 659 transitions, 8308 flow [2024-06-04 14:37:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:37:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:37:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 14:37:46,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580808080808081 [2024-06-04 14:37:46,144 INFO L175 Difference]: Start difference. First operand has 526 places, 627 transitions, 6420 flow. Second operand 9 states and 221 transitions. [2024-06-04 14:37:46,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 659 transitions, 8308 flow [2024-06-04 14:37:58,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 659 transitions, 8169 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:37:58,011 INFO L231 Difference]: Finished difference. Result has 529 places, 631 transitions, 6498 flow [2024-06-04 14:37:58,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6281, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6498, PETRI_PLACES=529, PETRI_TRANSITIONS=631} [2024-06-04 14:37:58,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 484 predicate places. [2024-06-04 14:37:58,012 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 631 transitions, 6498 flow [2024-06-04 14:37:58,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:58,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:58,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:58,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 14:37:58,014 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:58,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:58,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1391548678, now seen corresponding path program 6 times [2024-06-04 14:37:58,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:58,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319380292] [2024-06-04 14:37:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:58,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:58,165 INFO 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 14:37:58,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:58,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319380292] [2024-06-04 14:37:58,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319380292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:58,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:58,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822223892] [2024-06-04 14:37:58,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:58,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:58,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:58,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:58,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:37:58,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 631 transitions, 6498 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:58,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:58,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:37:58,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:59,467 INFO L124 PetriNetUnfolderBase]: 2748/4851 cut-off events. [2024-06-04 14:37:59,468 INFO L125 PetriNetUnfolderBase]: For 1274034/1274034 co-relation queries the response was YES. [2024-06-04 14:37:59,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38355 conditions, 4851 events. 2748/4851 cut-off events. For 1274034/1274034 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 34058 event pairs, 457 based on Foata normal form. 2/4848 useless extension candidates. Maximal degree in co-relation 38116. Up to 4140 conditions per place. [2024-06-04 14:37:59,553 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 614 selfloop transitions, 30 changer transitions 0/653 dead transitions. [2024-06-04 14:37:59,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 653 transitions, 7840 flow [2024-06-04 14:37:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:37:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:37:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:37:59,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-04 14:37:59,554 INFO L175 Difference]: Start difference. First operand has 529 places, 631 transitions, 6498 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:37:59,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 653 transitions, 7840 flow [2024-06-04 14:38:11,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 653 transitions, 7649 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:11,425 INFO L231 Difference]: Finished difference. Result has 531 places, 631 transitions, 6372 flow [2024-06-04 14:38:11,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6372, PETRI_PLACES=531, PETRI_TRANSITIONS=631} [2024-06-04 14:38:11,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 486 predicate places. [2024-06-04 14:38:11,426 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 631 transitions, 6372 flow [2024-06-04 14:38:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:11,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:11,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:11,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 14:38:11,427 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:11,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash -34337356, now seen corresponding path program 7 times [2024-06-04 14:38:11,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:11,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681668287] [2024-06-04 14:38:11,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:11,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:11,556 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 14:38:11,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:11,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681668287] [2024-06-04 14:38:11,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681668287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:11,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:11,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:11,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708452772] [2024-06-04 14:38:11,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:11,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:11,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:11,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:11,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:11,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:38:11,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 631 transitions, 6372 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:11,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:11,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:38:11,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:12,794 INFO L124 PetriNetUnfolderBase]: 2753/4860 cut-off events. [2024-06-04 14:38:12,794 INFO L125 PetriNetUnfolderBase]: For 1265813/1265813 co-relation queries the response was YES. [2024-06-04 14:38:13,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38190 conditions, 4860 events. 2753/4860 cut-off events. For 1265813/1265813 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 34106 event pairs, 457 based on Foata normal form. 1/4856 useless extension candidates. Maximal degree in co-relation 37950. Up to 4150 conditions per place. [2024-06-04 14:38:13,042 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 615 selfloop transitions, 31 changer transitions 0/655 dead transitions. [2024-06-04 14:38:13,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 655 transitions, 7776 flow [2024-06-04 14:38:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:38:13,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-04 14:38:13,043 INFO L175 Difference]: Start difference. First operand has 531 places, 631 transitions, 6372 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:38:13,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 655 transitions, 7776 flow [2024-06-04 14:38:25,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 655 transitions, 7711 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 14:38:25,164 INFO L231 Difference]: Finished difference. Result has 532 places, 634 transitions, 6441 flow [2024-06-04 14:38:25,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6441, PETRI_PLACES=532, PETRI_TRANSITIONS=634} [2024-06-04 14:38:25,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 487 predicate places. [2024-06-04 14:38:25,165 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 634 transitions, 6441 flow [2024-06-04 14:38:25,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:25,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:25,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 14:38:25,166 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:25,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1437874698, now seen corresponding path program 7 times [2024-06-04 14:38:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:25,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066002120] [2024-06-04 14:38:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:25,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066002120] [2024-06-04 14:38:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066002120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:25,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:25,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398759844] [2024-06-04 14:38:25,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:25,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:25,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:25,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:38:25,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 634 transitions, 6441 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:25,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:25,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:38:25,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:26,514 INFO L124 PetriNetUnfolderBase]: 2761/4874 cut-off events. [2024-06-04 14:38:26,514 INFO L125 PetriNetUnfolderBase]: For 1298459/1298459 co-relation queries the response was YES. [2024-06-04 14:38:26,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 4874 events. 2761/4874 cut-off events. For 1298459/1298459 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 34240 event pairs, 462 based on Foata normal form. 2/4869 useless extension candidates. Maximal degree in co-relation 38182. Up to 4084 conditions per place. [2024-06-04 14:38:26,604 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 556 selfloop transitions, 90 changer transitions 0/655 dead transitions. [2024-06-04 14:38:26,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 655 transitions, 7851 flow [2024-06-04 14:38:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:38:26,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-04 14:38:26,605 INFO L175 Difference]: Start difference. First operand has 532 places, 634 transitions, 6441 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:38:26,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 655 transitions, 7851 flow [2024-06-04 14:38:38,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 655 transitions, 7751 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:38,591 INFO L231 Difference]: Finished difference. Result has 534 places, 636 transitions, 6602 flow [2024-06-04 14:38:38,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6602, PETRI_PLACES=534, PETRI_TRANSITIONS=636} [2024-06-04 14:38:38,592 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 489 predicate places. [2024-06-04 14:38:38,592 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 636 transitions, 6602 flow [2024-06-04 14:38:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:38,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:38,592 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, 1, 1] [2024-06-04 14:38:38,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-04 14:38:38,593 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:38,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1437869738, now seen corresponding path program 8 times [2024-06-04 14:38:38,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:38,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722945219] [2024-06-04 14:38:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:38,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:38,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:38,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722945219] [2024-06-04 14:38:38,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722945219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:38,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:38,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:38,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807293499] [2024-06-04 14:38:38,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:38,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:38,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:38,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:38,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:38:38,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 636 transitions, 6602 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:38,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:38,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:38:38,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:39,934 INFO L124 PetriNetUnfolderBase]: 2774/4894 cut-off events. [2024-06-04 14:38:39,934 INFO L125 PetriNetUnfolderBase]: For 1312129/1312129 co-relation queries the response was YES. [2024-06-04 14:38:40,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39038 conditions, 4894 events. 2774/4894 cut-off events. For 1312129/1312129 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 34389 event pairs, 466 based on Foata normal form. 1/4886 useless extension candidates. Maximal degree in co-relation 38796. Up to 3966 conditions per place. [2024-06-04 14:38:40,203 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 505 selfloop transitions, 150 changer transitions 0/664 dead transitions. [2024-06-04 14:38:40,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 664 transitions, 9648 flow [2024-06-04 14:38:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 14:38:40,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:38:40,204 INFO L175 Difference]: Start difference. First operand has 534 places, 636 transitions, 6602 flow. Second operand 8 states and 206 transitions. [2024-06-04 14:38:40,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 664 transitions, 9648 flow [2024-06-04 14:38:52,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 664 transitions, 9403 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:52,416 INFO L231 Difference]: Finished difference. Result has 536 places, 642 transitions, 6795 flow [2024-06-04 14:38:52,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6357, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6795, PETRI_PLACES=536, PETRI_TRANSITIONS=642} [2024-06-04 14:38:52,417 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 491 predicate places. [2024-06-04 14:38:52,417 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 642 transitions, 6795 flow [2024-06-04 14:38:52,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:52,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:52,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:52,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-04 14:38:52,417 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:52,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash 253259188, now seen corresponding path program 9 times [2024-06-04 14:38:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:52,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181537266] [2024-06-04 14:38:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:52,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:52,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181537266] [2024-06-04 14:38:52,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181537266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:52,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:52,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:52,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999733006] [2024-06-04 14:38:52,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:52,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:52,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:52,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:52,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:52,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:38:52,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 642 transitions, 6795 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:52,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:52,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:38:52,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:53,790 INFO L124 PetriNetUnfolderBase]: 2771/4890 cut-off events. [2024-06-04 14:38:53,791 INFO L125 PetriNetUnfolderBase]: For 1305756/1305756 co-relation queries the response was YES. [2024-06-04 14:38:53,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38873 conditions, 4890 events. 2771/4890 cut-off events. For 1305756/1305756 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 34376 event pairs, 466 based on Foata normal form. 1/4882 useless extension candidates. Maximal degree in co-relation 38630. Up to 3963 conditions per place. [2024-06-04 14:38:53,878 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 502 selfloop transitions, 152 changer transitions 0/663 dead transitions. [2024-06-04 14:38:53,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 663 transitions, 9323 flow [2024-06-04 14:38:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:38:53,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:38:53,879 INFO L175 Difference]: Start difference. First operand has 536 places, 642 transitions, 6795 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:38:53,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 663 transitions, 9323 flow [2024-06-04 14:39:06,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 663 transitions, 8869 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-04 14:39:06,149 INFO L231 Difference]: Finished difference. Result has 539 places, 642 transitions, 6651 flow [2024-06-04 14:39:06,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6651, PETRI_PLACES=539, PETRI_TRANSITIONS=642} [2024-06-04 14:39:06,149 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 494 predicate places. [2024-06-04 14:39:06,149 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 642 transitions, 6651 flow [2024-06-04 14:39:06,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:06,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:06,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:06,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-04 14:39:06,150 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:06,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash -274257324, now seen corresponding path program 8 times [2024-06-04 14:39:06,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:06,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190051472] [2024-06-04 14:39:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:06,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190051472] [2024-06-04 14:39:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190051472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:06,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:06,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:39:06,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732800168] [2024-06-04 14:39:06,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:06,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:39:06,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:39:06,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:39:06,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-04 14:39:06,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 642 transitions, 6651 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:06,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:06,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-04 14:39:06,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:07,619 INFO L124 PetriNetUnfolderBase]: 2792/4924 cut-off events. [2024-06-04 14:39:07,619 INFO L125 PetriNetUnfolderBase]: For 1377534/1377534 co-relation queries the response was YES. [2024-06-04 14:39:07,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39653 conditions, 4924 events. 2792/4924 cut-off events. For 1377534/1377534 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 34626 event pairs, 455 based on Foata normal form. 2/4921 useless extension candidates. Maximal degree in co-relation 39409. Up to 4161 conditions per place. [2024-06-04 14:39:07,704 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 619 selfloop transitions, 47 changer transitions 0/675 dead transitions. [2024-06-04 14:39:07,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 675 transitions, 8597 flow [2024-06-04 14:39:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:39:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:39:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-04 14:39:07,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-04 14:39:07,705 INFO L175 Difference]: Start difference. First operand has 539 places, 642 transitions, 6651 flow. Second operand 10 states and 241 transitions. [2024-06-04 14:39:07,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 675 transitions, 8597 flow Killed by 15