./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.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-7724a2d-m [2024-06-27 19:32:05,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:32:05,929 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:32:05,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:32:05,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:32:05,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:32:05,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:32:05,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:32:05,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:32:05,962 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:32:05,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:32:05,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:32:05,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:32:05,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:32:05,964 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:32:05,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:32:05,965 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:32:05,965 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:32:05,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:32:05,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:32:05,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:32:05,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:32:05,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:32:05,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:32:05,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:32:05,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:32:05,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:32:05,967 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:32:05,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:32:05,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:32:05,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:32:05,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:32:05,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:05,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:32:05,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:32:05,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:32:05,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:32:05,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:32:05,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:32:05,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:32:05,970 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:32:05,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:32:05,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:32:05,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:32:06,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:32:06,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:32:06,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:32:06,179 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:32:06,188 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:32:06,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 19:32:06,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:32:06,353 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:32:06,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:32:07,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:32:07,570 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:32:07,570 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:32:07,585 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0946d13cc/51b6663bf4cd408880ff7ec1e89655f5/FLAG53537ce0b [2024-06-27 19:32:07,599 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0946d13cc/51b6663bf4cd408880ff7ec1e89655f5 [2024-06-27 19:32:07,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:32:07,600 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:32:07,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:07,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:32:07,607 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:32:07,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:06" (1/2) ... [2024-06-27 19:32:07,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4c3b51 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:07, skipping insertion in model container [2024-06-27 19:32:07,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:06" (1/2) ... [2024-06-27 19:32:07,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4950efc9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:07, skipping insertion in model container [2024-06-27 19:32:07,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:07" (2/2) ... [2024-06-27 19:32:07,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4c3b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:07, skipping insertion in model container [2024-06-27 19:32:07,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:07" (2/2) ... [2024-06-27 19:32:07,614 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:32:07,671 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:32:07,672 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 19:32:07,673 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 19:32:07,673 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 19:32:07,673 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-27 19:32:07,673 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:32:07,674 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-27 19:32:07,713 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:32:08,015 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:08,026 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:32:08,113 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:08,144 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:32:08,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08 WrapperNode [2024-06-27 19:32:08,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:08,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:08,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:32:08,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:32:08,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,206 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-27 19:32:08,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:08,207 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:32:08,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:32:08,207 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:32:08,218 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,223 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,235 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]. [2024-06-27 19:32:08,235 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,240 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,242 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:32:08,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:32:08,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:32:08,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:32:08,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (1/1) ... [2024-06-27 19:32:08,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:32:08,279 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) [2024-06-27 19:32:08,286 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 [2024-06-27 19:32:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:32:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:32:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:32:08,324 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:32:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:32:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:32:08,325 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:32:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:32:08,325 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 19:32:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 19:32:08,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:32:08,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:32:08,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:32:08,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:32:08,326 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:32:08,432 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:32:08,433 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:32:08,661 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:32:08,661 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:32:08,722 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:32:08,725 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:32:08,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:08 BoogieIcfgContainer [2024-06-27 19:32:08,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:32:08,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:32:08,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:32:08,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:32:08,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:06" (1/4) ... [2024-06-27 19:32:08,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c01ea8f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:32:08, skipping insertion in model container [2024-06-27 19:32:08,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:32:07" (2/4) ... [2024-06-27 19:32:08,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c01ea8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:08, skipping insertion in model container [2024-06-27 19:32:08,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:08" (3/4) ... [2024-06-27 19:32:08,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c01ea8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:08, skipping insertion in model container [2024-06-27 19:32:08,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:08" (4/4) ... [2024-06-27 19:32:08,795 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:32:08,820 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:32:08,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:32:08,821 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:32:08,889 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:32:08,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-27 19:32:08,937 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-27 19:32:08,937 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:08,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:32:08,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-27 19:32:08,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-27 19:32:08,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:32:08,951 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;@205b075, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:32:08,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 19:32:08,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:32:08,958 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:32:08,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:08,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:32:08,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:08,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash 233368746, now seen corresponding path program 1 times [2024-06-27 19:32:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850949922] [2024-06-27 19:32:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850949922] [2024-06-27 19:32:09,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850949922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:32:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768179300] [2024-06-27 19:32:09,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:32:09,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:32:09,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:32:09,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-06-27 19:32:09,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-06-27 19:32:09,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:09,631 INFO L124 PetriNetUnfolderBase]: 1447/2145 cut-off events. [2024-06-27 19:32:09,631 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-27 19:32:09,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2145 events. 1447/2145 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11460 event pairs, 968 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-27 19:32:09,650 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 35 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-27 19:32:09,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 207 flow [2024-06-27 19:32:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:32:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:32:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-27 19:32:09,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-06-27 19:32:09,661 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 107 transitions. [2024-06-27 19:32:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 207 flow [2024-06-27 19:32:09,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:09,668 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-27 19:32:09,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-27 19:32:09,672 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-27 19:32:09,672 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-27 19:32:09,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:32:09,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:09,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1102372348, now seen corresponding path program 1 times [2024-06-27 19:32:09,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653310910] [2024-06-27 19:32:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653310910] [2024-06-27 19:32:09,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653310910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351814634] [2024-06-27 19:32:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:09,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:09,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:09,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,318 INFO L124 PetriNetUnfolderBase]: 2467/3605 cut-off events. [2024-06-27 19:32:10,318 INFO L125 PetriNetUnfolderBase]: For 758/966 co-relation queries the response was YES. [2024-06-27 19:32:10,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 3605 events. 2467/3605 cut-off events. For 758/966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19486 event pairs, 1331 based on Foata normal form. 35/3606 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-27 19:32:10,339 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 51 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-06-27 19:32:10,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 309 flow [2024-06-27 19:32:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-06-27 19:32:10,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-06-27 19:32:10,343 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 138 transitions. [2024-06-27 19:32:10,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 309 flow [2024-06-27 19:32:10,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:10,347 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 152 flow [2024-06-27 19:32:10,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-27 19:32:10,348 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-06-27 19:32:10,348 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 152 flow [2024-06-27 19:32:10,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:32:10,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:10,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1297873024, now seen corresponding path program 1 times [2024-06-27 19:32:10,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256291493] [2024-06-27 19:32:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256291493] [2024-06-27 19:32:10,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256291493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722057555] [2024-06-27 19:32:10,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:10,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:10,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:10,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,823 INFO L124 PetriNetUnfolderBase]: 2618/4064 cut-off events. [2024-06-27 19:32:10,824 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-27 19:32:10,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 4064 events. 2618/4064 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23315 event pairs, 1356 based on Foata normal form. 3/4039 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-27 19:32:10,848 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 49 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-27 19:32:10,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 340 flow [2024-06-27 19:32:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-27 19:32:10,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-27 19:32:10,852 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 152 flow. Second operand 4 states and 131 transitions. [2024-06-27 19:32:10,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 340 flow [2024-06-27 19:32:10,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:10,855 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 212 flow [2024-06-27 19:32:10,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-27 19:32:10,856 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-06-27 19:32:10,857 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 212 flow [2024-06-27 19:32:10,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:32:10,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:10,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1969928397, now seen corresponding path program 1 times [2024-06-27 19:32:10,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348038402] [2024-06-27 19:32:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348038402] [2024-06-27 19:32:11,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348038402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722710345] [2024-06-27 19:32:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:11,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:11,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:11,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:11,400 INFO L124 PetriNetUnfolderBase]: 2603/4009 cut-off events. [2024-06-27 19:32:11,401 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-27 19:32:11,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11036 conditions, 4009 events. 2603/4009 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22726 event pairs, 1272 based on Foata normal form. 6/3970 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-27 19:32:11,478 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 57 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-27 19:32:11,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 430 flow [2024-06-27 19:32:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-27 19:32:11,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 19:32:11,481 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 212 flow. Second operand 5 states and 161 transitions. [2024-06-27 19:32:11,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 430 flow [2024-06-27 19:32:11,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:11,487 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 264 flow [2024-06-27 19:32:11,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 19:32:11,488 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-27 19:32:11,488 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 264 flow [2024-06-27 19:32:11,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:32:11,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:11,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1726107371, now seen corresponding path program 1 times [2024-06-27 19:32:11,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659274662] [2024-06-27 19:32:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659274662] [2024-06-27 19:32:11,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659274662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:11,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121641385] [2024-06-27 19:32:11,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:11,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:11,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:11,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:11,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,076 INFO L124 PetriNetUnfolderBase]: 3372/5076 cut-off events. [2024-06-27 19:32:12,076 INFO L125 PetriNetUnfolderBase]: For 6317/6368 co-relation queries the response was YES. [2024-06-27 19:32:12,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15117 conditions, 5076 events. 3372/5076 cut-off events. For 6317/6368 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28339 event pairs, 1298 based on Foata normal form. 16/5060 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-27 19:32:12,160 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 55 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-27 19:32:12,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 502 flow [2024-06-27 19:32:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-27 19:32:12,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-27 19:32:12,165 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 264 flow. Second operand 4 states and 134 transitions. [2024-06-27 19:32:12,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 502 flow [2024-06-27 19:32:12,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:12,172 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 332 flow [2024-06-27 19:32:12,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-27 19:32:12,175 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-27 19:32:12,175 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 332 flow [2024-06-27 19:32:12,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:32:12,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:12,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1725987401, now seen corresponding path program 2 times [2024-06-27 19:32:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072599746] [2024-06-27 19:32:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072599746] [2024-06-27 19:32:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072599746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050164950] [2024-06-27 19:32:12,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:12,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:12,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:12,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:12,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:12,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,856 INFO L124 PetriNetUnfolderBase]: 3363/5186 cut-off events. [2024-06-27 19:32:12,857 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-27 19:32:12,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 5186 events. 3363/5186 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29818 event pairs, 1431 based on Foata normal form. 18/5167 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-27 19:32:12,883 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 68 selfloop transitions, 20 changer transitions 0/98 dead transitions. [2024-06-27 19:32:12,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 666 flow [2024-06-27 19:32:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-27 19:32:12,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 19:32:12,885 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 332 flow. Second operand 5 states and 161 transitions. [2024-06-27 19:32:12,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 666 flow [2024-06-27 19:32:12,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 600 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:12,898 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 447 flow [2024-06-27 19:32:12,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-06-27 19:32:12,900 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-27 19:32:12,900 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 447 flow [2024-06-27 19:32:12,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:32:12,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:12,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2128335054, now seen corresponding path program 1 times [2024-06-27 19:32:12,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393123776] [2024-06-27 19:32:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:13,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393123776] [2024-06-27 19:32:13,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393123776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:13,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688177537] [2024-06-27 19:32:13,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:13,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:13,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:13,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:13,691 INFO L124 PetriNetUnfolderBase]: 4824/7273 cut-off events. [2024-06-27 19:32:13,691 INFO L125 PetriNetUnfolderBase]: For 18239/18453 co-relation queries the response was YES. [2024-06-27 19:32:13,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25583 conditions, 7273 events. 4824/7273 cut-off events. For 18239/18453 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43898 event pairs, 1097 based on Foata normal form. 104/7308 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-27 19:32:13,737 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 87 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-27 19:32:13,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 945 flow [2024-06-27 19:32:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-06-27 19:32:13,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-06-27 19:32:13,738 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 447 flow. Second operand 6 states and 208 transitions. [2024-06-27 19:32:13,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 945 flow [2024-06-27 19:32:13,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 131 transitions, 913 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:13,750 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 594 flow [2024-06-27 19:32:13,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=594, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-27 19:32:13,750 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-06-27 19:32:13,751 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 594 flow [2024-06-27 19:32:13,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:13,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:32:13,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:13,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1393136916, now seen corresponding path program 2 times [2024-06-27 19:32:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:13,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952254567] [2024-06-27 19:32:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:13,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952254567] [2024-06-27 19:32:13,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952254567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778467205] [2024-06-27 19:32:13,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:13,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:13,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:13,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,477 INFO L124 PetriNetUnfolderBase]: 4554/6933 cut-off events. [2024-06-27 19:32:14,477 INFO L125 PetriNetUnfolderBase]: For 24501/24735 co-relation queries the response was YES. [2024-06-27 19:32:14,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26096 conditions, 6933 events. 4554/6933 cut-off events. For 24501/24735 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41859 event pairs, 1415 based on Foata normal form. 122/6980 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-27 19:32:14,526 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 77 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2024-06-27 19:32:14,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 936 flow [2024-06-27 19:32:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-27 19:32:14,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.689795918367347 [2024-06-27 19:32:14,528 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 594 flow. Second operand 5 states and 169 transitions. [2024-06-27 19:32:14,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 936 flow [2024-06-27 19:32:14,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 884 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:14,558 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 646 flow [2024-06-27 19:32:14,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=646, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-27 19:32:14,559 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-27 19:32:14,559 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 646 flow [2024-06-27 19:32:14,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:14,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:14,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:32:14,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:14,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash -816466250, now seen corresponding path program 3 times [2024-06-27 19:32:14,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:14,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228403056] [2024-06-27 19:32:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:14,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:14,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228403056] [2024-06-27 19:32:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228403056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:14,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:14,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871006950] [2024-06-27 19:32:14,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:14,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:14,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:14,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 646 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:14,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:14,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:15,296 INFO L124 PetriNetUnfolderBase]: 4631/7073 cut-off events. [2024-06-27 19:32:15,297 INFO L125 PetriNetUnfolderBase]: For 25081/25369 co-relation queries the response was YES. [2024-06-27 19:32:15,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27069 conditions, 7073 events. 4631/7073 cut-off events. For 25081/25369 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42789 event pairs, 1615 based on Foata normal form. 34/7038 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-27 19:32:15,343 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-27 19:32:15,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 996 flow [2024-06-27 19:32:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-27 19:32:15,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-27 19:32:15,345 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 646 flow. Second operand 6 states and 192 transitions. [2024-06-27 19:32:15,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 996 flow [2024-06-27 19:32:15,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 948 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:15,389 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 682 flow [2024-06-27 19:32:15,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-27 19:32:15,390 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-06-27 19:32:15,390 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 682 flow [2024-06-27 19:32:15,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:15,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:15,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:32:15,391 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:15,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash -816281800, now seen corresponding path program 1 times [2024-06-27 19:32:15,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:15,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069846650] [2024-06-27 19:32:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:15,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:15,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:15,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069846650] [2024-06-27 19:32:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069846650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:15,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:15,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:15,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699089754] [2024-06-27 19:32:15,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:15,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:15,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:15,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:15,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,276 INFO L124 PetriNetUnfolderBase]: 4592/7016 cut-off events. [2024-06-27 19:32:16,277 INFO L125 PetriNetUnfolderBase]: For 27475/27763 co-relation queries the response was YES. [2024-06-27 19:32:16,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27209 conditions, 7016 events. 4592/7016 cut-off events. For 27475/27763 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42382 event pairs, 1399 based on Foata normal form. 28/6975 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-27 19:32:16,325 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-27 19:32:16,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1059 flow [2024-06-27 19:32:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:16,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-27 19:32:16,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-27 19:32:16,326 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 682 flow. Second operand 6 states and 194 transitions. [2024-06-27 19:32:16,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1059 flow [2024-06-27 19:32:16,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1005 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:16,368 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 736 flow [2024-06-27 19:32:16,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-27 19:32:16,369 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-06-27 19:32:16,369 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 736 flow [2024-06-27 19:32:16,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:16,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:16,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:32:16,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:16,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:16,371 INFO L85 PathProgramCache]: Analyzing trace with hash 176708674, now seen corresponding path program 1 times [2024-06-27 19:32:16,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:16,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806037466] [2024-06-27 19:32:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:16,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:16,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:16,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806037466] [2024-06-27 19:32:16,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806037466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:16,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:16,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043971958] [2024-06-27 19:32:16,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:16,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:16,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:16,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:16,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 736 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:16,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:16,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,950 INFO L124 PetriNetUnfolderBase]: 3701/5678 cut-off events. [2024-06-27 19:32:16,950 INFO L125 PetriNetUnfolderBase]: For 26498/26719 co-relation queries the response was YES. [2024-06-27 19:32:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23358 conditions, 5678 events. 3701/5678 cut-off events. For 26498/26719 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33929 event pairs, 1373 based on Foata normal form. 6/5624 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-27 19:32:16,981 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2024-06-27 19:32:16,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 1106 flow [2024-06-27 19:32:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 19:32:16,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-27 19:32:16,982 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 736 flow. Second operand 5 states and 158 transitions. [2024-06-27 19:32:16,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 1106 flow [2024-06-27 19:32:17,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1047 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:17,013 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 866 flow [2024-06-27 19:32:17,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-27 19:32:17,013 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-27 19:32:17,013 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 866 flow [2024-06-27 19:32:17,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:17,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:17,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:32:17,014 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:17,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:17,014 INFO L85 PathProgramCache]: Analyzing trace with hash 228593815, now seen corresponding path program 1 times [2024-06-27 19:32:17,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:17,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363404544] [2024-06-27 19:32:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:17,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:17,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:17,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363404544] [2024-06-27 19:32:17,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363404544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:17,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:17,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:17,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921593982] [2024-06-27 19:32:17,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:17,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:17,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:17,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:17,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 866 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:17,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:17,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:17,618 INFO L124 PetriNetUnfolderBase]: 5235/7909 cut-off events. [2024-06-27 19:32:17,618 INFO L125 PetriNetUnfolderBase]: For 41346/41452 co-relation queries the response was YES. [2024-06-27 19:32:17,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31917 conditions, 7909 events. 5235/7909 cut-off events. For 41346/41452 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48386 event pairs, 1971 based on Foata normal form. 12/7763 useless extension candidates. Maximal degree in co-relation 31882. Up to 7087 conditions per place. [2024-06-27 19:32:17,672 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 76 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-27 19:32:17,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 1138 flow [2024-06-27 19:32:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 19:32:17,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-27 19:32:17,674 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 866 flow. Second operand 4 states and 122 transitions. [2024-06-27 19:32:17,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 1138 flow [2024-06-27 19:32:17,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 1096 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:17,748 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 947 flow [2024-06-27 19:32:17,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=947, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-27 19:32:17,749 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-27 19:32:17,749 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 947 flow [2024-06-27 19:32:17,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:17,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:17,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:32:17,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:17,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash -573087969, now seen corresponding path program 1 times [2024-06-27 19:32:17,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:17,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321706557] [2024-06-27 19:32:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:17,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:17,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:17,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321706557] [2024-06-27 19:32:17,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321706557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:17,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:17,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:17,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54834949] [2024-06-27 19:32:17,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:17,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:17,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:17,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:17,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 947 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:18,482 INFO L124 PetriNetUnfolderBase]: 4657/7188 cut-off events. [2024-06-27 19:32:18,483 INFO L125 PetriNetUnfolderBase]: For 44422/44823 co-relation queries the response was YES. [2024-06-27 19:32:18,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32052 conditions, 7188 events. 4657/7188 cut-off events. For 44422/44823 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44546 event pairs, 1500 based on Foata normal form. 102/7216 useless extension candidates. Maximal degree in co-relation 32013. Up to 5914 conditions per place. [2024-06-27 19:32:18,525 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 102 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-27 19:32:18,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 1450 flow [2024-06-27 19:32:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-27 19:32:18,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-27 19:32:18,526 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 947 flow. Second operand 6 states and 194 transitions. [2024-06-27 19:32:18,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 1450 flow [2024-06-27 19:32:18,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 149 transitions, 1446 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:18,588 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 1117 flow [2024-06-27 19:32:18,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1117, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-27 19:32:18,589 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2024-06-27 19:32:18,589 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 1117 flow [2024-06-27 19:32:18,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:18,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:32:18,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:18,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 547062797, now seen corresponding path program 2 times [2024-06-27 19:32:18,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536014698] [2024-06-27 19:32:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:18,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:18,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536014698] [2024-06-27 19:32:18,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536014698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:18,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:18,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23085596] [2024-06-27 19:32:18,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:18,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:18,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 1117 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:18,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:18,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:18,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:19,273 INFO L124 PetriNetUnfolderBase]: 4558/7078 cut-off events. [2024-06-27 19:32:19,273 INFO L125 PetriNetUnfolderBase]: For 49842/50193 co-relation queries the response was YES. [2024-06-27 19:32:19,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 7078 events. 4558/7078 cut-off events. For 49842/50193 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44089 event pairs, 1607 based on Foata normal form. 60/7064 useless extension candidates. Maximal degree in co-relation 32263. Up to 6243 conditions per place. [2024-06-27 19:32:19,325 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 100 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-27 19:32:19,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1453 flow [2024-06-27 19:32:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 19:32:19,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-27 19:32:19,326 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 1117 flow. Second operand 6 states and 187 transitions. [2024-06-27 19:32:19,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1453 flow [2024-06-27 19:32:19,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1371 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:19,455 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1095 flow [2024-06-27 19:32:19,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1095, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-27 19:32:19,455 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-06-27 19:32:19,455 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1095 flow [2024-06-27 19:32:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:19,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:32:19,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:19,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1762622183, now seen corresponding path program 1 times [2024-06-27 19:32:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343423583] [2024-06-27 19:32:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:19,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343423583] [2024-06-27 19:32:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343423583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:19,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:19,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:19,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109687064] [2024-06-27 19:32:19,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:19,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:19,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:19,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1095 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:19,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:19,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:20,268 INFO L124 PetriNetUnfolderBase]: 5399/8107 cut-off events. [2024-06-27 19:32:20,268 INFO L125 PetriNetUnfolderBase]: For 53418/53807 co-relation queries the response was YES. [2024-06-27 19:32:20,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36429 conditions, 8107 events. 5399/8107 cut-off events. For 53418/53807 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49203 event pairs, 1733 based on Foata normal form. 56/8035 useless extension candidates. Maximal degree in co-relation 36385. Up to 7318 conditions per place. [2024-06-27 19:32:20,320 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 87 selfloop transitions, 41 changer transitions 0/140 dead transitions. [2024-06-27 19:32:20,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1463 flow [2024-06-27 19:32:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-27 19:32:20,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-27 19:32:20,322 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1095 flow. Second operand 5 states and 160 transitions. [2024-06-27 19:32:20,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1463 flow [2024-06-27 19:32:20,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 140 transitions, 1407 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:20,407 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 1189 flow [2024-06-27 19:32:20,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-27 19:32:20,407 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-27 19:32:20,407 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 1189 flow [2024-06-27 19:32:20,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:20,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:20,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:32:20,408 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:20,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1877913353, now seen corresponding path program 2 times [2024-06-27 19:32:20,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:20,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270173016] [2024-06-27 19:32:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:20,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270173016] [2024-06-27 19:32:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270173016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:20,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:20,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:20,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2632624] [2024-06-27 19:32:20,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:20,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:20,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 1189 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:20,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:20,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:21,172 INFO L124 PetriNetUnfolderBase]: 5466/8212 cut-off events. [2024-06-27 19:32:21,172 INFO L125 PetriNetUnfolderBase]: For 62280/62845 co-relation queries the response was YES. [2024-06-27 19:32:21,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 8212 events. 5466/8212 cut-off events. For 62280/62845 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49988 event pairs, 1737 based on Foata normal form. 90/8176 useless extension candidates. Maximal degree in co-relation 38808. Up to 7362 conditions per place. [2024-06-27 19:32:21,235 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 93 selfloop transitions, 51 changer transitions 0/156 dead transitions. [2024-06-27 19:32:21,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 156 transitions, 1723 flow [2024-06-27 19:32:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 19:32:21,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-27 19:32:21,237 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 1189 flow. Second operand 6 states and 190 transitions. [2024-06-27 19:32:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 156 transitions, 1723 flow [2024-06-27 19:32:21,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1621 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:21,346 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1314 flow [2024-06-27 19:32:21,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1314, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-27 19:32:21,347 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-06-27 19:32:21,347 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1314 flow [2024-06-27 19:32:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:21,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:21,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:32:21,348 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:21,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1878182123, now seen corresponding path program 3 times [2024-06-27 19:32:21,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:21,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028517289] [2024-06-27 19:32:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:21,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:21,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028517289] [2024-06-27 19:32:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028517289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:21,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:21,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698286189] [2024-06-27 19:32:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:21,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:21,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:21,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:21,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:21,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:22,248 INFO L124 PetriNetUnfolderBase]: 5482/8238 cut-off events. [2024-06-27 19:32:22,248 INFO L125 PetriNetUnfolderBase]: For 72752/73320 co-relation queries the response was YES. [2024-06-27 19:32:22,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40964 conditions, 8238 events. 5482/8238 cut-off events. For 72752/73320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50100 event pairs, 1737 based on Foata normal form. 103/8215 useless extension candidates. Maximal degree in co-relation 40918. Up to 7379 conditions per place. [2024-06-27 19:32:22,319 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 91 selfloop transitions, 55 changer transitions 0/158 dead transitions. [2024-06-27 19:32:22,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1806 flow [2024-06-27 19:32:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-27 19:32:22,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-27 19:32:22,322 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1314 flow. Second operand 6 states and 188 transitions. [2024-06-27 19:32:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1806 flow [2024-06-27 19:32:22,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 1707 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:22,467 INFO L231 Difference]: Finished difference. Result has 109 places, 128 transitions, 1396 flow [2024-06-27 19:32:22,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=109, PETRI_TRANSITIONS=128} [2024-06-27 19:32:22,468 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-27 19:32:22,468 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 128 transitions, 1396 flow [2024-06-27 19:32:22,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:22,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:22,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:32:22,469 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:22,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1521738569, now seen corresponding path program 4 times [2024-06-27 19:32:22,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030121119] [2024-06-27 19:32:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:22,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:22,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:22,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030121119] [2024-06-27 19:32:22,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030121119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:22,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:22,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:22,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390083927] [2024-06-27 19:32:22,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:22,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:22,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:22,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:22,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:22,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:22,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:22,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,383 INFO L124 PetriNetUnfolderBase]: 5440/8168 cut-off events. [2024-06-27 19:32:23,383 INFO L125 PetriNetUnfolderBase]: For 77188/77756 co-relation queries the response was YES. [2024-06-27 19:32:23,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41051 conditions, 8168 events. 5440/8168 cut-off events. For 77188/77756 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49562 event pairs, 1743 based on Foata normal form. 46/8088 useless extension candidates. Maximal degree in co-relation 41003. Up to 7376 conditions per place. [2024-06-27 19:32:23,447 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-06-27 19:32:23,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1750 flow [2024-06-27 19:32:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-27 19:32:23,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-27 19:32:23,449 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 1396 flow. Second operand 5 states and 162 transitions. [2024-06-27 19:32:23,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1750 flow [2024-06-27 19:32:23,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 154 transitions, 1595 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:23,615 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1337 flow [2024-06-27 19:32:23,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1337, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-27 19:32:23,616 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-27 19:32:23,616 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1337 flow [2024-06-27 19:32:23,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:32:23,617 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:23,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash 923773174, now seen corresponding path program 1 times [2024-06-27 19:32:23,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204358656] [2024-06-27 19:32:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204358656] [2024-06-27 19:32:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204358656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644849322] [2024-06-27 19:32:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:23,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:23,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1337 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:23,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,439 INFO L124 PetriNetUnfolderBase]: 5397/8145 cut-off events. [2024-06-27 19:32:24,439 INFO L125 PetriNetUnfolderBase]: For 88152/88271 co-relation queries the response was YES. [2024-06-27 19:32:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39954 conditions, 8145 events. 5397/8145 cut-off events. For 88152/88271 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50157 event pairs, 1842 based on Foata normal form. 16/7976 useless extension candidates. Maximal degree in co-relation 39905. Up to 7236 conditions per place. [2024-06-27 19:32:24,491 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-27 19:32:24,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1645 flow [2024-06-27 19:32:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 19:32:24,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:32:24,493 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1337 flow. Second operand 4 states and 126 transitions. [2024-06-27 19:32:24,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1645 flow [2024-06-27 19:32:24,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:24,610 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1350 flow [2024-06-27 19:32:24,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1350, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-27 19:32:24,611 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-27 19:32:24,611 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1350 flow [2024-06-27 19:32:24,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:32:24,611 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:24,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash 635343158, now seen corresponding path program 2 times [2024-06-27 19:32:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706243096] [2024-06-27 19:32:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706243096] [2024-06-27 19:32:24,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706243096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841820202] [2024-06-27 19:32:24,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:24,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:24,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:24,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1350 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:24,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,331 INFO L124 PetriNetUnfolderBase]: 5381/8142 cut-off events. [2024-06-27 19:32:25,332 INFO L125 PetriNetUnfolderBase]: For 94399/94518 co-relation queries the response was YES. [2024-06-27 19:32:25,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42156 conditions, 8142 events. 5381/8142 cut-off events. For 94399/94518 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50254 event pairs, 1830 based on Foata normal form. 13/7973 useless extension candidates. Maximal degree in co-relation 42106. Up to 7255 conditions per place. [2024-06-27 19:32:25,400 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 97 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-27 19:32:25,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1777 flow [2024-06-27 19:32:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 19:32:25,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-27 19:32:25,402 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1350 flow. Second operand 5 states and 148 transitions. [2024-06-27 19:32:25,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1777 flow [2024-06-27 19:32:25,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1686 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:25,587 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1524 flow [2024-06-27 19:32:25,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1524, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-27 19:32:25,587 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2024-06-27 19:32:25,587 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1524 flow [2024-06-27 19:32:25,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:32:25,588 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:25,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash 624873590, now seen corresponding path program 1 times [2024-06-27 19:32:25,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661100119] [2024-06-27 19:32:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661100119] [2024-06-27 19:32:25,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661100119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407568504] [2024-06-27 19:32:25,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:25,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:25,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:32:25,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1524 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:32:25,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:26,405 INFO L124 PetriNetUnfolderBase]: 5943/8874 cut-off events. [2024-06-27 19:32:26,405 INFO L125 PetriNetUnfolderBase]: For 93352/93352 co-relation queries the response was YES. [2024-06-27 19:32:26,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46602 conditions, 8874 events. 5943/8874 cut-off events. For 93352/93352 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52806 event pairs, 1941 based on Foata normal form. 1/8871 useless extension candidates. Maximal degree in co-relation 46549. Up to 8299 conditions per place. [2024-06-27 19:32:26,478 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 155 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-27 19:32:26,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2151 flow [2024-06-27 19:32:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 19:32:26,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:32:26,479 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1524 flow. Second operand 5 states and 147 transitions. [2024-06-27 19:32:26,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2151 flow [2024-06-27 19:32:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 2109 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:26,743 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1763 flow [2024-06-27 19:32:26,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1763, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-27 19:32:26,744 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-06-27 19:32:26,744 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1763 flow [2024-06-27 19:32:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:32:26,745 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:26,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash -974949610, now seen corresponding path program 2 times [2024-06-27 19:32:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257793940] [2024-06-27 19:32:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257793940] [2024-06-27 19:32:26,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257793940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:26,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605931994] [2024-06-27 19:32:26,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:26,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:32:26,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1763 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:32:26,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,563 INFO L124 PetriNetUnfolderBase]: 5939/8865 cut-off events. [2024-06-27 19:32:27,563 INFO L125 PetriNetUnfolderBase]: For 103267/103267 co-relation queries the response was YES. [2024-06-27 19:32:27,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48284 conditions, 8865 events. 5939/8865 cut-off events. For 103267/103267 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52839 event pairs, 1947 based on Foata normal form. 1/8861 useless extension candidates. Maximal degree in co-relation 48226. Up to 8295 conditions per place. [2024-06-27 19:32:27,634 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 148 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2024-06-27 19:32:27,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 177 transitions, 2138 flow [2024-06-27 19:32:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 19:32:27,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:32:27,636 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1763 flow. Second operand 5 states and 140 transitions. [2024-06-27 19:32:27,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 177 transitions, 2138 flow [2024-06-27 19:32:27,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 2074 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:27,936 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1755 flow [2024-06-27 19:32:27,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1755, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-27 19:32:27,937 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-06-27 19:32:27,937 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1755 flow [2024-06-27 19:32:27,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:32:27,938 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:27,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2048349136, now seen corresponding path program 1 times [2024-06-27 19:32:27,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391133743] [2024-06-27 19:32:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391133743] [2024-06-27 19:32:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391133743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173545291] [2024-06-27 19:32:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:28,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:32:28,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1755 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:32:28,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:28,757 INFO L124 PetriNetUnfolderBase]: 5414/8239 cut-off events. [2024-06-27 19:32:28,757 INFO L125 PetriNetUnfolderBase]: For 108088/108097 co-relation queries the response was YES. [2024-06-27 19:32:28,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44974 conditions, 8239 events. 5414/8239 cut-off events. For 108088/108097 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50848 event pairs, 1875 based on Foata normal form. 13/8110 useless extension candidates. Maximal degree in co-relation 44913. Up to 7271 conditions per place. [2024-06-27 19:32:28,831 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 125 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-27 19:32:28,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 181 transitions, 2099 flow [2024-06-27 19:32:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 19:32:28,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-27 19:32:28,832 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1755 flow. Second operand 5 states and 146 transitions. [2024-06-27 19:32:28,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 181 transitions, 2099 flow [2024-06-27 19:32:29,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2064 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:29,099 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1795 flow [2024-06-27 19:32:29,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1795, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2024-06-27 19:32:29,100 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-27 19:32:29,100 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1795 flow [2024-06-27 19:32:29,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:29,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:29,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:32:29,101 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:29,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1511358293, now seen corresponding path program 1 times [2024-06-27 19:32:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:29,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146752055] [2024-06-27 19:32:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:29,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146752055] [2024-06-27 19:32:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146752055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:29,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049221790] [2024-06-27 19:32:29,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:29,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:29,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1795 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:29,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:29,985 INFO L124 PetriNetUnfolderBase]: 5639/8539 cut-off events. [2024-06-27 19:32:29,985 INFO L125 PetriNetUnfolderBase]: For 114476/114485 co-relation queries the response was YES. [2024-06-27 19:32:30,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 8539 events. 5639/8539 cut-off events. For 114476/114485 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51993 event pairs, 1938 based on Foata normal form. 7/8503 useless extension candidates. Maximal degree in co-relation 47666. Up to 7745 conditions per place. [2024-06-27 19:32:30,060 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 26 changer transitions 0/191 dead transitions. [2024-06-27 19:32:30,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2274 flow [2024-06-27 19:32:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 19:32:30,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-27 19:32:30,062 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1795 flow. Second operand 5 states and 146 transitions. [2024-06-27 19:32:30,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2274 flow [2024-06-27 19:32:30,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 2225 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:30,387 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 1959 flow [2024-06-27 19:32:30,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1959, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2024-06-27 19:32:30,388 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 83 predicate places. [2024-06-27 19:32:30,388 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 1959 flow [2024-06-27 19:32:30,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:30,388 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] [2024-06-27 19:32:30,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:32:30,389 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:30,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash 860020480, now seen corresponding path program 1 times [2024-06-27 19:32:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:30,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219687496] [2024-06-27 19:32:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:30,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:30,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:30,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219687496] [2024-06-27 19:32:30,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219687496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:30,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:30,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126169452] [2024-06-27 19:32:30,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:30,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:30,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:30,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:30,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 1959 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:30,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:30,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,575 INFO L124 PetriNetUnfolderBase]: 6497/9982 cut-off events. [2024-06-27 19:32:31,575 INFO L125 PetriNetUnfolderBase]: For 173565/174407 co-relation queries the response was YES. [2024-06-27 19:32:31,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60095 conditions, 9982 events. 6497/9982 cut-off events. For 173565/174407 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 64552 event pairs, 1263 based on Foata normal form. 138/9922 useless extension candidates. Maximal degree in co-relation 60029. Up to 5168 conditions per place. [2024-06-27 19:32:31,672 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 157 selfloop transitions, 70 changer transitions 0/243 dead transitions. [2024-06-27 19:32:31,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2933 flow [2024-06-27 19:32:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 235 transitions. [2024-06-27 19:32:31,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685131195335277 [2024-06-27 19:32:31,688 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 1959 flow. Second operand 7 states and 235 transitions. [2024-06-27 19:32:31,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2933 flow [2024-06-27 19:32:32,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 243 transitions, 2891 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:32,212 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 2199 flow [2024-06-27 19:32:32,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2024-06-27 19:32:32,212 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 91 predicate places. [2024-06-27 19:32:32,212 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 2199 flow [2024-06-27 19:32:32,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:32,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:32,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:32:32,213 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:32,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1542602202, now seen corresponding path program 2 times [2024-06-27 19:32:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141571173] [2024-06-27 19:32:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:32,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141571173] [2024-06-27 19:32:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141571173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:32,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:32,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:32,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77542540] [2024-06-27 19:32:32,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:32,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:32,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:32,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:32,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:32,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:33,425 INFO L124 PetriNetUnfolderBase]: 6392/9844 cut-off events. [2024-06-27 19:32:33,425 INFO L125 PetriNetUnfolderBase]: For 179022/179838 co-relation queries the response was YES. [2024-06-27 19:32:33,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60736 conditions, 9844 events. 6392/9844 cut-off events. For 179022/179838 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63385 event pairs, 1611 based on Foata normal form. 56/9680 useless extension candidates. Maximal degree in co-relation 60666. Up to 8191 conditions per place. [2024-06-27 19:32:33,528 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 173 selfloop transitions, 33 changer transitions 0/222 dead transitions. [2024-06-27 19:32:33,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2779 flow [2024-06-27 19:32:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 19:32:33,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:32:33,530 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 2199 flow. Second operand 6 states and 189 transitions. [2024-06-27 19:32:33,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2779 flow [2024-06-27 19:32:34,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 222 transitions, 2699 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:34,128 INFO L231 Difference]: Finished difference. Result has 147 places, 184 transitions, 2191 flow [2024-06-27 19:32:34,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2191, PETRI_PLACES=147, PETRI_TRANSITIONS=184} [2024-06-27 19:32:34,128 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-27 19:32:34,129 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 184 transitions, 2191 flow [2024-06-27 19:32:34,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:34,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:34,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:32:34,129 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:34,130 INFO L85 PathProgramCache]: Analyzing trace with hash 354250122, now seen corresponding path program 3 times [2024-06-27 19:32:34,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:34,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235034356] [2024-06-27 19:32:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:34,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:34,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235034356] [2024-06-27 19:32:34,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235034356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:34,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:34,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:34,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802698279] [2024-06-27 19:32:34,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:34,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:34,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:34,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:34,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 184 transitions, 2191 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:34,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:34,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:35,413 INFO L124 PetriNetUnfolderBase]: 6713/10283 cut-off events. [2024-06-27 19:32:35,413 INFO L125 PetriNetUnfolderBase]: For 200897/201725 co-relation queries the response was YES. [2024-06-27 19:32:35,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63932 conditions, 10283 events. 6713/10283 cut-off events. For 200897/201725 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 66649 event pairs, 1958 based on Foata normal form. 140/10200 useless extension candidates. Maximal degree in co-relation 63860. Up to 6714 conditions per place. [2024-06-27 19:32:35,511 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 151 selfloop transitions, 63 changer transitions 0/230 dead transitions. [2024-06-27 19:32:35,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 230 transitions, 2948 flow [2024-06-27 19:32:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-27 19:32:35,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-27 19:32:35,656 INFO L175 Difference]: Start difference. First operand has 147 places, 184 transitions, 2191 flow. Second operand 6 states and 200 transitions. [2024-06-27 19:32:35,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 230 transitions, 2948 flow [2024-06-27 19:32:36,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 230 transitions, 2874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:36,167 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 2281 flow [2024-06-27 19:32:36,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2024-06-27 19:32:36,167 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 97 predicate places. [2024-06-27 19:32:36,167 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 2281 flow [2024-06-27 19:32:36,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:36,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:32:36,168 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:36,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1742362790, now seen corresponding path program 4 times [2024-06-27 19:32:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554922752] [2024-06-27 19:32:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:36,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:36,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554922752] [2024-06-27 19:32:36,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554922752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:36,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:36,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:36,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134895608] [2024-06-27 19:32:36,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:36,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:36,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 2281 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:36,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:36,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:37,471 INFO L124 PetriNetUnfolderBase]: 6561/10073 cut-off events. [2024-06-27 19:32:37,472 INFO L125 PetriNetUnfolderBase]: For 200888/201708 co-relation queries the response was YES. [2024-06-27 19:32:37,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62048 conditions, 10073 events. 6561/10073 cut-off events. For 200888/201708 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 65107 event pairs, 2172 based on Foata normal form. 144/9992 useless extension candidates. Maximal degree in co-relation 61975. Up to 8206 conditions per place. [2024-06-27 19:32:37,573 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 148 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-27 19:32:37,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 219 transitions, 2839 flow [2024-06-27 19:32:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 19:32:37,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-27 19:32:37,574 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 2281 flow. Second operand 6 states and 191 transitions. [2024-06-27 19:32:37,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 219 transitions, 2839 flow [2024-06-27 19:32:38,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 219 transitions, 2683 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:38,229 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 2247 flow [2024-06-27 19:32:38,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2247, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2024-06-27 19:32:38,234 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-27 19:32:38,234 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 2247 flow [2024-06-27 19:32:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:38,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:32:38,235 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:38,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash 780887688, now seen corresponding path program 5 times [2024-06-27 19:32:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:38,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431099390] [2024-06-27 19:32:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:38,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:38,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431099390] [2024-06-27 19:32:38,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431099390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:38,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:38,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505975213] [2024-06-27 19:32:38,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:38,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:38,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:38,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:38,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 2247 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:38,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:38,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:39,794 INFO L124 PetriNetUnfolderBase]: 7231/11115 cut-off events. [2024-06-27 19:32:39,794 INFO L125 PetriNetUnfolderBase]: For 219497/220477 co-relation queries the response was YES. [2024-06-27 19:32:39,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68410 conditions, 11115 events. 7231/11115 cut-off events. For 219497/220477 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 73941 event pairs, 2382 based on Foata normal form. 211/11062 useless extension candidates. Maximal degree in co-relation 68337. Up to 8656 conditions per place. [2024-06-27 19:32:39,916 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 153 selfloop transitions, 68 changer transitions 0/237 dead transitions. [2024-06-27 19:32:39,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 3043 flow [2024-06-27 19:32:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-27 19:32:39,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-27 19:32:39,918 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 2247 flow. Second operand 7 states and 226 transitions. [2024-06-27 19:32:39,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 3043 flow [2024-06-27 19:32:40,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 237 transitions, 2900 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:40,513 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2308 flow [2024-06-27 19:32:40,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2308, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-27 19:32:40,514 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2024-06-27 19:32:40,514 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2308 flow [2024-06-27 19:32:40,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:40,515 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] [2024-06-27 19:32:40,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:32:40,515 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:40,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 788506248, now seen corresponding path program 6 times [2024-06-27 19:32:40,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:40,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867297428] [2024-06-27 19:32:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:40,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:40,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:40,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867297428] [2024-06-27 19:32:40,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867297428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:40,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:40,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:40,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33298551] [2024-06-27 19:32:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:40,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:40,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2308 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:40,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:40,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:41,902 INFO L124 PetriNetUnfolderBase]: 7522/11556 cut-off events. [2024-06-27 19:32:41,902 INFO L125 PetriNetUnfolderBase]: For 228128/229140 co-relation queries the response was YES. [2024-06-27 19:32:41,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70903 conditions, 11556 events. 7522/11556 cut-off events. For 228128/229140 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 77552 event pairs, 2612 based on Foata normal form. 209/11481 useless extension candidates. Maximal degree in co-relation 70830. Up to 9873 conditions per place. [2024-06-27 19:32:42,013 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 145 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-27 19:32:42,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 227 transitions, 2906 flow [2024-06-27 19:32:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 19:32:42,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:32:42,014 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2308 flow. Second operand 7 states and 217 transitions. [2024-06-27 19:32:42,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 227 transitions, 2906 flow [2024-06-27 19:32:42,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 227 transitions, 2804 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:42,691 INFO L231 Difference]: Finished difference. Result has 155 places, 188 transitions, 2378 flow [2024-06-27 19:32:42,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2378, PETRI_PLACES=155, PETRI_TRANSITIONS=188} [2024-06-27 19:32:42,692 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 103 predicate places. [2024-06-27 19:32:42,693 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 188 transitions, 2378 flow [2024-06-27 19:32:42,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:42,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:42,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:32:42,693 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:42,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:42,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1046794218, now seen corresponding path program 7 times [2024-06-27 19:32:42,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:42,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922774662] [2024-06-27 19:32:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:42,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:42,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:42,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922774662] [2024-06-27 19:32:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922774662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:42,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:42,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437720789] [2024-06-27 19:32:42,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:42,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:42,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:42,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:42,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 188 transitions, 2378 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:42,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:42,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:44,149 INFO L124 PetriNetUnfolderBase]: 7890/12100 cut-off events. [2024-06-27 19:32:44,149 INFO L125 PetriNetUnfolderBase]: For 239734/240662 co-relation queries the response was YES. [2024-06-27 19:32:44,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74143 conditions, 12100 events. 7890/12100 cut-off events. For 239734/240662 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 81834 event pairs, 2709 based on Foata normal form. 164/11990 useless extension candidates. Maximal degree in co-relation 74068. Up to 10407 conditions per place. [2024-06-27 19:32:44,269 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 143 selfloop transitions, 67 changer transitions 0/226 dead transitions. [2024-06-27 19:32:44,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 226 transitions, 2974 flow [2024-06-27 19:32:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 19:32:44,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268221574344023 [2024-06-27 19:32:44,270 INFO L175 Difference]: Start difference. First operand has 155 places, 188 transitions, 2378 flow. Second operand 7 states and 215 transitions. [2024-06-27 19:32:44,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 226 transitions, 2974 flow [2024-06-27 19:32:44,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 226 transitions, 2838 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:44,994 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2412 flow [2024-06-27 19:32:44,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2412, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-27 19:32:44,995 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 105 predicate places. [2024-06-27 19:32:44,995 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2412 flow [2024-06-27 19:32:44,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:44,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:44,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:44,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:32:44,996 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:44,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2101922504, now seen corresponding path program 8 times [2024-06-27 19:32:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433516487] [2024-06-27 19:32:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433516487] [2024-06-27 19:32:45,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433516487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:45,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:45,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130415252] [2024-06-27 19:32:45,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:45,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:45,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:45,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:45,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2412 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:45,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:45,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:45,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:46,429 INFO L124 PetriNetUnfolderBase]: 7788/11900 cut-off events. [2024-06-27 19:32:46,429 INFO L125 PetriNetUnfolderBase]: For 234421/235292 co-relation queries the response was YES. [2024-06-27 19:32:46,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71953 conditions, 11900 events. 7788/11900 cut-off events. For 234421/235292 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 79811 event pairs, 2581 based on Foata normal form. 83/11704 useless extension candidates. Maximal degree in co-relation 71877. Up to 10092 conditions per place. [2024-06-27 19:32:46,548 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 156 selfloop transitions, 55 changer transitions 0/227 dead transitions. [2024-06-27 19:32:46,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2978 flow [2024-06-27 19:32:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-27 19:32:46,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-27 19:32:46,550 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2412 flow. Second operand 6 states and 195 transitions. [2024-06-27 19:32:46,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2978 flow [2024-06-27 19:32:47,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2832 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:47,196 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2388 flow [2024-06-27 19:32:47,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2388, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-27 19:32:47,197 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-27 19:32:47,197 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2388 flow [2024-06-27 19:32:47,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:47,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:47,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:32:47,197 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:47,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash 958144138, now seen corresponding path program 1 times [2024-06-27 19:32:47,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:47,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278227387] [2024-06-27 19:32:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:47,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:47,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278227387] [2024-06-27 19:32:47,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278227387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:47,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:47,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:47,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087202616] [2024-06-27 19:32:47,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:47,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:47,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:47,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:47,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2388 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:47,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:48,704 INFO L124 PetriNetUnfolderBase]: 8261/12723 cut-off events. [2024-06-27 19:32:48,704 INFO L125 PetriNetUnfolderBase]: For 254506/255466 co-relation queries the response was YES. [2024-06-27 19:32:48,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77052 conditions, 12723 events. 8261/12723 cut-off events. For 254506/255466 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 86889 event pairs, 2393 based on Foata normal form. 144/12601 useless extension candidates. Maximal degree in co-relation 76975. Up to 6218 conditions per place. [2024-06-27 19:32:48,832 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 149 selfloop transitions, 82 changer transitions 0/247 dead transitions. [2024-06-27 19:32:48,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 247 transitions, 3270 flow [2024-06-27 19:32:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-27 19:32:48,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705539358600583 [2024-06-27 19:32:48,834 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2388 flow. Second operand 7 states and 230 transitions. [2024-06-27 19:32:48,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 247 transitions, 3270 flow [2024-06-27 19:32:49,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 247 transitions, 3148 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:49,612 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 2498 flow [2024-06-27 19:32:49,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-27 19:32:49,613 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 108 predicate places. [2024-06-27 19:32:49,613 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 2498 flow [2024-06-27 19:32:49,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:49,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:49,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:32:49,614 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:49,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:49,614 INFO L85 PathProgramCache]: Analyzing trace with hash 958412908, now seen corresponding path program 2 times [2024-06-27 19:32:49,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:49,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088993591] [2024-06-27 19:32:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:49,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:49,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:49,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088993591] [2024-06-27 19:32:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088993591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:49,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:49,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:49,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16571314] [2024-06-27 19:32:49,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:49,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:49,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:49,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:49,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:49,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:49,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:51,193 INFO L124 PetriNetUnfolderBase]: 8451/13043 cut-off events. [2024-06-27 19:32:51,193 INFO L125 PetriNetUnfolderBase]: For 273696/274670 co-relation queries the response was YES. [2024-06-27 19:32:51,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79834 conditions, 13043 events. 8451/13043 cut-off events. For 273696/274670 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 89728 event pairs, 2366 based on Foata normal form. 140/12897 useless extension candidates. Maximal degree in co-relation 79756. Up to 6252 conditions per place. [2024-06-27 19:32:51,349 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 147 selfloop transitions, 83 changer transitions 0/246 dead transitions. [2024-06-27 19:32:51,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 246 transitions, 3358 flow [2024-06-27 19:32:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-27 19:32:51,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647230320699709 [2024-06-27 19:32:51,350 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 2498 flow. Second operand 7 states and 228 transitions. [2024-06-27 19:32:51,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 246 transitions, 3358 flow [2024-06-27 19:32:52,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 246 transitions, 3166 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:52,414 INFO L231 Difference]: Finished difference. Result has 163 places, 192 transitions, 2510 flow [2024-06-27 19:32:52,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2510, PETRI_PLACES=163, PETRI_TRANSITIONS=192} [2024-06-27 19:32:52,414 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-27 19:32:52,414 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 192 transitions, 2510 flow [2024-06-27 19:32:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:52,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:52,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:32:52,415 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:52,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1046978668, now seen corresponding path program 3 times [2024-06-27 19:32:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:52,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072063563] [2024-06-27 19:32:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:52,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:52,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:52,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072063563] [2024-06-27 19:32:52,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072063563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:52,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:52,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:52,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784426690] [2024-06-27 19:32:52,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:52,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:52,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:52,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:52,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:52,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 192 transitions, 2510 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:52,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:52,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:54,054 INFO L124 PetriNetUnfolderBase]: 8730/13544 cut-off events. [2024-06-27 19:32:54,055 INFO L125 PetriNetUnfolderBase]: For 289838/290695 co-relation queries the response was YES. [2024-06-27 19:32:54,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82428 conditions, 13544 events. 8730/13544 cut-off events. For 289838/290695 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 94665 event pairs, 3008 based on Foata normal form. 136/13380 useless extension candidates. Maximal degree in co-relation 82349. Up to 10095 conditions per place. [2024-06-27 19:32:54,204 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 150 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-27 19:32:54,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 237 transitions, 3192 flow [2024-06-27 19:32:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-27 19:32:54,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641399416909621 [2024-06-27 19:32:54,205 INFO L175 Difference]: Start difference. First operand has 163 places, 192 transitions, 2510 flow. Second operand 7 states and 220 transitions. [2024-06-27 19:32:54,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 237 transitions, 3192 flow [2024-06-27 19:32:55,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 3060 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:55,064 INFO L231 Difference]: Finished difference. Result has 166 places, 193 transitions, 2554 flow [2024-06-27 19:32:55,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2554, PETRI_PLACES=166, PETRI_TRANSITIONS=193} [2024-06-27 19:32:55,065 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-06-27 19:32:55,065 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 193 transitions, 2554 flow [2024-06-27 19:32:55,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:32:55,066 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:55,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2102106954, now seen corresponding path program 4 times [2024-06-27 19:32:55,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667149966] [2024-06-27 19:32:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667149966] [2024-06-27 19:32:55,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667149966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:55,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229400767] [2024-06-27 19:32:55,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:55,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:55,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:32:55,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 193 transitions, 2554 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:32:55,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:56,731 INFO L124 PetriNetUnfolderBase]: 8632/13312 cut-off events. [2024-06-27 19:32:56,732 INFO L125 PetriNetUnfolderBase]: For 282764/283633 co-relation queries the response was YES. [2024-06-27 19:32:56,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79764 conditions, 13312 events. 8632/13312 cut-off events. For 282764/283633 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91715 event pairs, 2422 based on Foata normal form. 75/13051 useless extension candidates. Maximal degree in co-relation 79684. Up to 9827 conditions per place. [2024-06-27 19:32:56,861 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 158 selfloop transitions, 64 changer transitions 0/238 dead transitions. [2024-06-27 19:32:56,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 238 transitions, 3206 flow [2024-06-27 19:32:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-27 19:32:56,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-27 19:32:56,863 INFO L175 Difference]: Start difference. First operand has 166 places, 193 transitions, 2554 flow. Second operand 6 states and 200 transitions. [2024-06-27 19:32:56,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 238 transitions, 3206 flow [2024-06-27 19:32:57,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 238 transitions, 3052 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:57,731 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 2537 flow [2024-06-27 19:32:57,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2024-06-27 19:32:57,732 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2024-06-27 19:32:57,732 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 2537 flow [2024-06-27 19:32:57,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:57,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:57,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:32:57,733 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:32:57,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1325105589, now seen corresponding path program 1 times [2024-06-27 19:32:57,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:57,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525081192] [2024-06-27 19:32:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:57,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:57,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525081192] [2024-06-27 19:32:57,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525081192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:57,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:57,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:57,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6728637] [2024-06-27 19:32:57,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:57,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:57,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:57,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:32:57,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 2537 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:57,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:32:57,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:59,344 INFO L124 PetriNetUnfolderBase]: 9585/14477 cut-off events. [2024-06-27 19:32:59,345 INFO L125 PetriNetUnfolderBase]: For 256847/256855 co-relation queries the response was YES. [2024-06-27 19:32:59,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84215 conditions, 14477 events. 9585/14477 cut-off events. For 256847/256855 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97168 event pairs, 3552 based on Foata normal form. 7/14479 useless extension candidates. Maximal degree in co-relation 84134. Up to 13575 conditions per place. [2024-06-27 19:32:59,498 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-27 19:32:59,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 226 transitions, 3249 flow [2024-06-27 19:32:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 19:32:59,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-06-27 19:32:59,499 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 2537 flow. Second operand 7 states and 194 transitions. [2024-06-27 19:32:59,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 226 transitions, 3249 flow [2024-06-27 19:33:00,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 226 transitions, 3073 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:00,498 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2635 flow [2024-06-27 19:33:00,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-27 19:33:00,499 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 117 predicate places. [2024-06-27 19:33:00,499 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2635 flow [2024-06-27 19:33:00,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:00,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:00,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:33:00,499 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:00,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1325404119, now seen corresponding path program 2 times [2024-06-27 19:33:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343297462] [2024-06-27 19:33:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:00,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343297462] [2024-06-27 19:33:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343297462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:00,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815790071] [2024-06-27 19:33:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:00,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:00,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:00,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 2635 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:00,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:00,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:02,105 INFO L124 PetriNetUnfolderBase]: 9581/14462 cut-off events. [2024-06-27 19:33:02,105 INFO L125 PetriNetUnfolderBase]: For 265078/265096 co-relation queries the response was YES. [2024-06-27 19:33:02,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84993 conditions, 14462 events. 9581/14462 cut-off events. For 265078/265096 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97058 event pairs, 3566 based on Foata normal form. 17/14470 useless extension candidates. Maximal degree in co-relation 84910. Up to 13571 conditions per place. [2024-06-27 19:33:02,277 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 171 selfloop transitions, 37 changer transitions 0/217 dead transitions. [2024-06-27 19:33:02,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 217 transitions, 3081 flow [2024-06-27 19:33:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 19:33:02,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-06-27 19:33:02,278 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2635 flow. Second operand 5 states and 143 transitions. [2024-06-27 19:33:02,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 217 transitions, 3081 flow [2024-06-27 19:33:03,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 217 transitions, 2955 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:03,101 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 2595 flow [2024-06-27 19:33:03,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2595, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-27 19:33:03,102 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-27 19:33:03,102 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 2595 flow [2024-06-27 19:33:03,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:03,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:03,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:33:03,103 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:03,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash 100814959, now seen corresponding path program 1 times [2024-06-27 19:33:03,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:03,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749146113] [2024-06-27 19:33:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:03,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749146113] [2024-06-27 19:33:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749146113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:03,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:03,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917600158] [2024-06-27 19:33:03,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:03,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:03,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:03,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:33:03,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 2595 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:03,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:33:03,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:04,798 INFO L124 PetriNetUnfolderBase]: 9251/13943 cut-off events. [2024-06-27 19:33:04,799 INFO L125 PetriNetUnfolderBase]: For 310945/311078 co-relation queries the response was YES. [2024-06-27 19:33:04,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83540 conditions, 13943 events. 9251/13943 cut-off events. For 310945/311078 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 94363 event pairs, 3360 based on Foata normal form. 87/13562 useless extension candidates. Maximal degree in co-relation 83455. Up to 12410 conditions per place. [2024-06-27 19:33:04,946 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 130 selfloop transitions, 52 changer transitions 0/226 dead transitions. [2024-06-27 19:33:04,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 226 transitions, 3075 flow [2024-06-27 19:33:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-27 19:33:04,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:33:04,947 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 2595 flow. Second operand 5 states and 155 transitions. [2024-06-27 19:33:04,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 226 transitions, 3075 flow [2024-06-27 19:33:05,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 226 transitions, 2994 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:05,655 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2678 flow [2024-06-27 19:33:05,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2678, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-27 19:33:05,657 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-27 19:33:05,657 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2678 flow [2024-06-27 19:33:05,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:05,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:05,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:33:05,658 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:05,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:05,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1090773493, now seen corresponding path program 3 times [2024-06-27 19:33:05,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:05,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116644632] [2024-06-27 19:33:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:05,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:05,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:05,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116644632] [2024-06-27 19:33:05,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116644632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:05,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:05,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:05,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134393152] [2024-06-27 19:33:05,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:05,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:05,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:05,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2678 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:05,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:05,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:07,380 INFO L124 PetriNetUnfolderBase]: 9916/14953 cut-off events. [2024-06-27 19:33:07,380 INFO L125 PetriNetUnfolderBase]: For 277080/277088 co-relation queries the response was YES. [2024-06-27 19:33:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89497 conditions, 14953 events. 9916/14953 cut-off events. For 277080/277088 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100565 event pairs, 3607 based on Foata normal form. 7/14953 useless extension candidates. Maximal degree in co-relation 89412. Up to 14020 conditions per place. [2024-06-27 19:33:07,572 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 184 selfloop transitions, 47 changer transitions 0/240 dead transitions. [2024-06-27 19:33:07,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 3430 flow [2024-06-27 19:33:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 19:33:07,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-27 19:33:07,573 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2678 flow. Second operand 6 states and 172 transitions. [2024-06-27 19:33:07,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 3430 flow [2024-06-27 19:33:08,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 3322 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:08,584 INFO L231 Difference]: Finished difference. Result has 176 places, 220 transitions, 2876 flow [2024-06-27 19:33:08,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2876, PETRI_PLACES=176, PETRI_TRANSITIONS=220} [2024-06-27 19:33:08,584 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 124 predicate places. [2024-06-27 19:33:08,584 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 220 transitions, 2876 flow [2024-06-27 19:33:08,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:08,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:08,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:33:08,585 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:08,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:08,586 INFO L85 PathProgramCache]: Analyzing trace with hash -118815385, now seen corresponding path program 4 times [2024-06-27 19:33:08,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:08,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625541034] [2024-06-27 19:33:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:08,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:08,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:08,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625541034] [2024-06-27 19:33:08,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625541034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:08,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:08,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:08,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596721500] [2024-06-27 19:33:08,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:08,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:08,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:08,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:08,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 220 transitions, 2876 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:08,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:08,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:10,271 INFO L124 PetriNetUnfolderBase]: 9923/14946 cut-off events. [2024-06-27 19:33:10,272 INFO L125 PetriNetUnfolderBase]: For 280253/280271 co-relation queries the response was YES. [2024-06-27 19:33:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89515 conditions, 14946 events. 9923/14946 cut-off events. For 280253/280271 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100262 event pairs, 3628 based on Foata normal form. 17/14954 useless extension candidates. Maximal degree in co-relation 89428. Up to 14028 conditions per place. [2024-06-27 19:33:10,448 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 51 changer transitions 0/238 dead transitions. [2024-06-27 19:33:10,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3506 flow [2024-06-27 19:33:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 19:33:10,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-27 19:33:10,460 INFO L175 Difference]: Start difference. First operand has 176 places, 220 transitions, 2876 flow. Second operand 6 states and 166 transitions. [2024-06-27 19:33:10,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3506 flow [2024-06-27 19:33:11,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 238 transitions, 3412 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-27 19:33:11,429 INFO L231 Difference]: Finished difference. Result has 181 places, 224 transitions, 2963 flow [2024-06-27 19:33:11,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2963, PETRI_PLACES=181, PETRI_TRANSITIONS=224} [2024-06-27 19:33:11,430 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 129 predicate places. [2024-06-27 19:33:11,430 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 224 transitions, 2963 flow [2024-06-27 19:33:11,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:11,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:11,430 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] [2024-06-27 19:33:11,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:33:11,430 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:11,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:11,431 INFO L85 PathProgramCache]: Analyzing trace with hash 679443797, now seen corresponding path program 5 times [2024-06-27 19:33:11,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:11,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021873299] [2024-06-27 19:33:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:11,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021873299] [2024-06-27 19:33:11,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021873299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:11,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:11,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:11,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351315737] [2024-06-27 19:33:11,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:11,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:11,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:11,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:11,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 224 transitions, 2963 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:11,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:11,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:11,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:13,171 INFO L124 PetriNetUnfolderBase]: 9919/14945 cut-off events. [2024-06-27 19:33:13,171 INFO L125 PetriNetUnfolderBase]: For 280165/280183 co-relation queries the response was YES. [2024-06-27 19:33:13,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88237 conditions, 14945 events. 9919/14945 cut-off events. For 280165/280183 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100358 event pairs, 3632 based on Foata normal form. 17/14953 useless extension candidates. Maximal degree in co-relation 88147. Up to 14024 conditions per place. [2024-06-27 19:33:13,354 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 177 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-27 19:33:13,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 237 transitions, 3451 flow [2024-06-27 19:33:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 19:33:13,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-27 19:33:13,368 INFO L175 Difference]: Start difference. First operand has 181 places, 224 transitions, 2963 flow. Second operand 6 states and 165 transitions. [2024-06-27 19:33:13,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 237 transitions, 3451 flow [2024-06-27 19:33:14,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 3264 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:14,361 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2885 flow [2024-06-27 19:33:14,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2885, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-27 19:33:14,362 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-06-27 19:33:14,363 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2885 flow [2024-06-27 19:33:14,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:14,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:14,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:33:14,363 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:14,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash 679456693, now seen corresponding path program 2 times [2024-06-27 19:33:14,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:14,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073145133] [2024-06-27 19:33:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:14,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:14,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073145133] [2024-06-27 19:33:14,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073145133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:14,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:14,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:14,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901419616] [2024-06-27 19:33:14,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:14,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:14,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:14,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:33:14,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2885 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:14,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:33:14,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:16,008 INFO L124 PetriNetUnfolderBase]: 9365/14121 cut-off events. [2024-06-27 19:33:16,009 INFO L125 PetriNetUnfolderBase]: For 312052/312177 co-relation queries the response was YES. [2024-06-27 19:33:16,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85204 conditions, 14121 events. 9365/14121 cut-off events. For 312052/312177 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 95734 event pairs, 3368 based on Foata normal form. 43/13697 useless extension candidates. Maximal degree in co-relation 85113. Up to 12796 conditions per place. [2024-06-27 19:33:16,166 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 153 selfloop transitions, 38 changer transitions 0/243 dead transitions. [2024-06-27 19:33:16,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 243 transitions, 3355 flow [2024-06-27 19:33:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 19:33:16,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-27 19:33:16,251 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2885 flow. Second operand 6 states and 174 transitions. [2024-06-27 19:33:16,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 243 transitions, 3355 flow [2024-06-27 19:33:17,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 243 transitions, 3207 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:17,225 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 2848 flow [2024-06-27 19:33:17,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2848, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-27 19:33:17,226 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 133 predicate places. [2024-06-27 19:33:17,226 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 2848 flow [2024-06-27 19:33:17,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:17,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:17,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:17,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:33:17,226 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:17,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:17,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1368517167, now seen corresponding path program 3 times [2024-06-27 19:33:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:17,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131366056] [2024-06-27 19:33:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:17,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:17,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:17,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131366056] [2024-06-27 19:33:17,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131366056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:17,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:17,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277130191] [2024-06-27 19:33:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:17,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:17,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-27 19:33:17,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 2848 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:17,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:17,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-27 19:33:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:19,010 INFO L124 PetriNetUnfolderBase]: 9373/14125 cut-off events. [2024-06-27 19:33:19,011 INFO L125 PetriNetUnfolderBase]: For 319277/319390 co-relation queries the response was YES. [2024-06-27 19:33:19,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86240 conditions, 14125 events. 9373/14125 cut-off events. For 319277/319390 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95515 event pairs, 3340 based on Foata normal form. 41/13705 useless extension candidates. Maximal degree in co-relation 86149. Up to 12680 conditions per place. [2024-06-27 19:33:19,158 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 154 selfloop transitions, 43 changer transitions 0/249 dead transitions. [2024-06-27 19:33:19,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 249 transitions, 3368 flow [2024-06-27 19:33:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 19:33:19,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-27 19:33:19,160 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 2848 flow. Second operand 6 states and 176 transitions. [2024-06-27 19:33:19,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 249 transitions, 3368 flow [2024-06-27 19:33:20,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 249 transitions, 3287 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:20,144 INFO L231 Difference]: Finished difference. Result has 188 places, 229 transitions, 2921 flow [2024-06-27 19:33:20,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2921, PETRI_PLACES=188, PETRI_TRANSITIONS=229} [2024-06-27 19:33:20,145 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-27 19:33:20,145 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 229 transitions, 2921 flow [2024-06-27 19:33:20,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:20,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:20,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:33:20,146 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:20,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash -800445355, now seen corresponding path program 1 times [2024-06-27 19:33:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:20,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678769795] [2024-06-27 19:33:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:20,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:20,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678769795] [2024-06-27 19:33:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678769795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:20,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:20,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:20,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103845867] [2024-06-27 19:33:20,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:20,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:20,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:20,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:20,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 229 transitions, 2921 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:20,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:20,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:21,921 INFO L124 PetriNetUnfolderBase]: 10126/15244 cut-off events. [2024-06-27 19:33:21,922 INFO L125 PetriNetUnfolderBase]: For 326226/326226 co-relation queries the response was YES. [2024-06-27 19:33:22,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92937 conditions, 15244 events. 10126/15244 cut-off events. For 326226/326226 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 102433 event pairs, 3653 based on Foata normal form. 6/15246 useless extension candidates. Maximal degree in co-relation 92844. Up to 14266 conditions per place. [2024-06-27 19:33:22,148 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 234 selfloop transitions, 25 changer transitions 0/268 dead transitions. [2024-06-27 19:33:22,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 268 transitions, 3724 flow [2024-06-27 19:33:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 19:33:22,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 19:33:22,150 INFO L175 Difference]: Start difference. First operand has 188 places, 229 transitions, 2921 flow. Second operand 6 states and 179 transitions. [2024-06-27 19:33:22,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 268 transitions, 3724 flow [2024-06-27 19:33:23,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 268 transitions, 3640 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:23,706 INFO L231 Difference]: Finished difference. Result has 192 places, 235 transitions, 3006 flow [2024-06-27 19:33:23,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3006, PETRI_PLACES=192, PETRI_TRANSITIONS=235} [2024-06-27 19:33:23,708 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 140 predicate places. [2024-06-27 19:33:23,708 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 235 transitions, 3006 flow [2024-06-27 19:33:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:23,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:33:23,709 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:23,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash -791874475, now seen corresponding path program 2 times [2024-06-27 19:33:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920539672] [2024-06-27 19:33:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:23,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920539672] [2024-06-27 19:33:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920539672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:23,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:23,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227625829] [2024-06-27 19:33:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:23,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:23,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 235 transitions, 3006 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:23,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:23,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:25,910 INFO L124 PetriNetUnfolderBase]: 10170/15304 cut-off events. [2024-06-27 19:33:25,911 INFO L125 PetriNetUnfolderBase]: For 342513/342513 co-relation queries the response was YES. [2024-06-27 19:33:26,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94056 conditions, 15304 events. 10170/15304 cut-off events. For 342513/342513 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 102982 event pairs, 3644 based on Foata normal form. 8/15308 useless extension candidates. Maximal degree in co-relation 93961. Up to 14402 conditions per place. [2024-06-27 19:33:26,120 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 229 selfloop transitions, 22 changer transitions 0/260 dead transitions. [2024-06-27 19:33:26,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 260 transitions, 3626 flow [2024-06-27 19:33:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-27 19:33:26,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-27 19:33:26,122 INFO L175 Difference]: Start difference. First operand has 192 places, 235 transitions, 3006 flow. Second operand 6 states and 170 transitions. [2024-06-27 19:33:26,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 260 transitions, 3626 flow [2024-06-27 19:33:27,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 260 transitions, 3569 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:27,561 INFO L231 Difference]: Finished difference. Result has 196 places, 237 transitions, 3041 flow [2024-06-27 19:33:27,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3041, PETRI_PLACES=196, PETRI_TRANSITIONS=237} [2024-06-27 19:33:27,561 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-27 19:33:27,561 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 237 transitions, 3041 flow [2024-06-27 19:33:27,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:27,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:27,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:27,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:33:27,562 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:27,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1090577015, now seen corresponding path program 1 times [2024-06-27 19:33:27,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:27,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765411671] [2024-06-27 19:33:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:27,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:27,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765411671] [2024-06-27 19:33:27,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765411671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:27,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:27,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844156210] [2024-06-27 19:33:27,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:27,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:27,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:27,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 237 transitions, 3041 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:27,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:27,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:27,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:29,378 INFO L124 PetriNetUnfolderBase]: 10188/15329 cut-off events. [2024-06-27 19:33:29,379 INFO L125 PetriNetUnfolderBase]: For 348889/348893 co-relation queries the response was YES. [2024-06-27 19:33:29,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94445 conditions, 15329 events. 10188/15329 cut-off events. For 348889/348893 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103042 event pairs, 3619 based on Foata normal form. 5/15329 useless extension candidates. Maximal degree in co-relation 94348. Up to 14410 conditions per place. [2024-06-27 19:33:29,561 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-27 19:33:29,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 4013 flow [2024-06-27 19:33:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 19:33:29,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-27 19:33:29,563 INFO L175 Difference]: Start difference. First operand has 196 places, 237 transitions, 3041 flow. Second operand 6 states and 176 transitions. [2024-06-27 19:33:29,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 4013 flow [2024-06-27 19:33:31,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 3963 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:31,397 INFO L231 Difference]: Finished difference. Result has 200 places, 252 transitions, 3326 flow [2024-06-27 19:33:31,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3326, PETRI_PLACES=200, PETRI_TRANSITIONS=252} [2024-06-27 19:33:31,397 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 148 predicate places. [2024-06-27 19:33:31,397 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 252 transitions, 3326 flow [2024-06-27 19:33:31,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:31,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:31,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:33:31,398 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:31,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1090784405, now seen corresponding path program 2 times [2024-06-27 19:33:31,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:31,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284828228] [2024-06-27 19:33:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:31,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:31,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284828228] [2024-06-27 19:33:31,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284828228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:31,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:31,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:31,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586265629] [2024-06-27 19:33:31,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:31,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:31,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:31,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:31,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 252 transitions, 3326 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:31,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:31,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:33,566 INFO L124 PetriNetUnfolderBase]: 10206/15364 cut-off events. [2024-06-27 19:33:33,566 INFO L125 PetriNetUnfolderBase]: For 374233/374237 co-relation queries the response was YES. [2024-06-27 19:33:33,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97423 conditions, 15364 events. 10206/15364 cut-off events. For 374233/374237 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103477 event pairs, 3624 based on Foata normal form. 5/15364 useless extension candidates. Maximal degree in co-relation 97323. Up to 14430 conditions per place. [2024-06-27 19:33:33,896 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 226 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2024-06-27 19:33:33,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 282 transitions, 4233 flow [2024-06-27 19:33:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 19:33:33,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-27 19:33:33,898 INFO L175 Difference]: Start difference. First operand has 200 places, 252 transitions, 3326 flow. Second operand 6 states and 173 transitions. [2024-06-27 19:33:33,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 282 transitions, 4233 flow [2024-06-27 19:33:35,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 282 transitions, 4116 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-27 19:33:35,414 INFO L231 Difference]: Finished difference. Result has 206 places, 261 transitions, 3483 flow [2024-06-27 19:33:35,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3483, PETRI_PLACES=206, PETRI_TRANSITIONS=261} [2024-06-27 19:33:35,414 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-27 19:33:35,415 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 261 transitions, 3483 flow [2024-06-27 19:33:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:35,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:35,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:35,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:33:35,415 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:35,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1227032649, now seen corresponding path program 3 times [2024-06-27 19:33:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:35,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818457183] [2024-06-27 19:33:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:35,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:35,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818457183] [2024-06-27 19:33:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818457183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:35,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:35,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113005314] [2024-06-27 19:33:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:35,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:35,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:35,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 261 transitions, 3483 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:35,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:35,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:35,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:37,741 INFO L124 PetriNetUnfolderBase]: 10180/15326 cut-off events. [2024-06-27 19:33:37,741 INFO L125 PetriNetUnfolderBase]: For 385388/385388 co-relation queries the response was YES. [2024-06-27 19:33:37,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97265 conditions, 15326 events. 10180/15326 cut-off events. For 385388/385388 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103174 event pairs, 3617 based on Foata normal form. 8/15329 useless extension candidates. Maximal degree in co-relation 97162. Up to 14414 conditions per place. [2024-06-27 19:33:37,897 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 248 selfloop transitions, 22 changer transitions 0/279 dead transitions. [2024-06-27 19:33:37,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 279 transitions, 4104 flow [2024-06-27 19:33:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-27 19:33:37,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-27 19:33:37,899 INFO L175 Difference]: Start difference. First operand has 206 places, 261 transitions, 3483 flow. Second operand 6 states and 164 transitions. [2024-06-27 19:33:37,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 279 transitions, 4104 flow [2024-06-27 19:33:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 279 transitions, 4014 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:39,666 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 3458 flow [2024-06-27 19:33:39,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-27 19:33:39,667 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2024-06-27 19:33:39,667 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 3458 flow [2024-06-27 19:33:39,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:39,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:39,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:33:39,668 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:39,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:39,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2035623001, now seen corresponding path program 3 times [2024-06-27 19:33:39,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:39,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163283585] [2024-06-27 19:33:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:39,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:39,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:39,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163283585] [2024-06-27 19:33:39,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163283585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995204496] [2024-06-27 19:33:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:39,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:39,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:39,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 3458 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:39,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:39,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:42,120 INFO L124 PetriNetUnfolderBase]: 10176/15325 cut-off events. [2024-06-27 19:33:42,120 INFO L125 PetriNetUnfolderBase]: For 390460/390464 co-relation queries the response was YES. [2024-06-27 19:33:42,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97397 conditions, 15325 events. 10176/15325 cut-off events. For 390460/390464 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103216 event pairs, 3616 based on Foata normal form. 5/15325 useless extension candidates. Maximal degree in co-relation 97293. Up to 14411 conditions per place. [2024-06-27 19:33:42,300 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 237 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-27 19:33:42,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 281 transitions, 4134 flow [2024-06-27 19:33:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 19:33:42,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:33:42,301 INFO L175 Difference]: Start difference. First operand has 210 places, 262 transitions, 3458 flow. Second operand 5 states and 150 transitions. [2024-06-27 19:33:42,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 281 transitions, 4134 flow [2024-06-27 19:33:44,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 281 transitions, 4060 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:44,278 INFO L231 Difference]: Finished difference. Result has 211 places, 262 transitions, 3466 flow [2024-06-27 19:33:44,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3466, PETRI_PLACES=211, PETRI_TRANSITIONS=262} [2024-06-27 19:33:44,278 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 159 predicate places. [2024-06-27 19:33:44,278 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 262 transitions, 3466 flow [2024-06-27 19:33:44,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:44,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:44,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:33:44,279 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:44,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash -346065129, now seen corresponding path program 4 times [2024-06-27 19:33:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:44,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443000248] [2024-06-27 19:33:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:44,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:44,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:44,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443000248] [2024-06-27 19:33:44,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443000248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:44,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:44,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:44,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051504585] [2024-06-27 19:33:44,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:44,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:44,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:44,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:44,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 262 transitions, 3466 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:44,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:44,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:46,610 INFO L124 PetriNetUnfolderBase]: 10172/15322 cut-off events. [2024-06-27 19:33:46,610 INFO L125 PetriNetUnfolderBase]: For 401214/401218 co-relation queries the response was YES. [2024-06-27 19:33:46,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97564 conditions, 15322 events. 10172/15322 cut-off events. For 401214/401218 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103171 event pairs, 3614 based on Foata normal form. 5/15324 useless extension candidates. Maximal degree in co-relation 97459. Up to 14407 conditions per place. [2024-06-27 19:33:46,802 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 236 selfloop transitions, 39 changer transitions 0/284 dead transitions. [2024-06-27 19:33:46,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 284 transitions, 4100 flow [2024-06-27 19:33:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 19:33:46,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626822157434402 [2024-06-27 19:33:46,803 INFO L175 Difference]: Start difference. First operand has 211 places, 262 transitions, 3466 flow. Second operand 7 states and 193 transitions. [2024-06-27 19:33:46,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 284 transitions, 4100 flow [2024-06-27 19:33:49,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 284 transitions, 3979 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:49,039 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 3469 flow [2024-06-27 19:33:49,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3469, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-27 19:33:49,040 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 162 predicate places. [2024-06-27 19:33:49,040 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 3469 flow [2024-06-27 19:33:49,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:49,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:49,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:33:49,041 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:49,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1356135023, now seen corresponding path program 5 times [2024-06-27 19:33:49,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:49,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398022235] [2024-06-27 19:33:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:49,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:49,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398022235] [2024-06-27 19:33:49,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398022235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:49,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:49,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779269137] [2024-06-27 19:33:49,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:49,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:49,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:49,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:49,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 3469 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:49,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:49,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:51,378 INFO L124 PetriNetUnfolderBase]: 10168/15312 cut-off events. [2024-06-27 19:33:51,378 INFO L125 PetriNetUnfolderBase]: For 413061/413065 co-relation queries the response was YES. [2024-06-27 19:33:51,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97739 conditions, 15312 events. 10168/15312 cut-off events. For 413061/413065 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103114 event pairs, 3629 based on Foata normal form. 5/15312 useless extension candidates. Maximal degree in co-relation 97633. Up to 14384 conditions per place. [2024-06-27 19:33:51,554 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 219 selfloop transitions, 51 changer transitions 0/279 dead transitions. [2024-06-27 19:33:51,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 279 transitions, 4067 flow [2024-06-27 19:33:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 19:33:51,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-27 19:33:51,555 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 3469 flow. Second operand 6 states and 165 transitions. [2024-06-27 19:33:51,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 279 transitions, 4067 flow [2024-06-27 19:33:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 279 transitions, 3951 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:53,768 INFO L231 Difference]: Finished difference. Result has 215 places, 266 transitions, 3488 flow [2024-06-27 19:33:53,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3488, PETRI_PLACES=215, PETRI_TRANSITIONS=266} [2024-06-27 19:33:53,768 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 163 predicate places. [2024-06-27 19:33:53,769 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 266 transitions, 3488 flow [2024-06-27 19:33:53,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:53,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:53,769 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] [2024-06-27 19:33:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:33:53,769 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:53,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1368523119, now seen corresponding path program 1 times [2024-06-27 19:33:53,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:53,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796622582] [2024-06-27 19:33:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:53,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:53,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796622582] [2024-06-27 19:33:53,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796622582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:53,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:53,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:53,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172648102] [2024-06-27 19:33:53,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:53,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:53,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:53,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:53,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:53,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 266 transitions, 3488 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:53,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:53,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:53,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:56,047 INFO L124 PetriNetUnfolderBase]: 10149/15274 cut-off events. [2024-06-27 19:33:56,047 INFO L125 PetriNetUnfolderBase]: For 423908/423908 co-relation queries the response was YES. [2024-06-27 19:33:56,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97556 conditions, 15274 events. 10149/15274 cut-off events. For 423908/423908 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 102660 event pairs, 3591 based on Foata normal form. 6/15275 useless extension candidates. Maximal degree in co-relation 97449. Up to 14312 conditions per place. [2024-06-27 19:33:56,219 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 254 selfloop transitions, 28 changer transitions 0/291 dead transitions. [2024-06-27 19:33:56,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 291 transitions, 4222 flow [2024-06-27 19:33:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 19:33:56,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-27 19:33:56,220 INFO L175 Difference]: Start difference. First operand has 215 places, 266 transitions, 3488 flow. Second operand 6 states and 166 transitions. [2024-06-27 19:33:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 291 transitions, 4222 flow [2024-06-27 19:33:58,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 291 transitions, 4136 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:58,387 INFO L231 Difference]: Finished difference. Result has 219 places, 271 transitions, 3563 flow [2024-06-27 19:33:58,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3563, PETRI_PLACES=219, PETRI_TRANSITIONS=271} [2024-06-27 19:33:58,388 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 167 predicate places. [2024-06-27 19:33:58,388 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 271 transitions, 3563 flow [2024-06-27 19:33:58,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:58,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:58,388 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, 1] [2024-06-27 19:33:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:33:58,388 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:33:58,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1284841095, now seen corresponding path program 1 times [2024-06-27 19:33:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091915272] [2024-06-27 19:33:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:58,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091915272] [2024-06-27 19:33:58,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091915272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:58,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:58,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:58,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437781571] [2024-06-27 19:33:58,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:58,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:58,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:58,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:58,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:58,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:33:58,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 271 transitions, 3563 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:58,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:58,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:33:58,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:00,808 INFO L124 PetriNetUnfolderBase]: 10350/15583 cut-off events. [2024-06-27 19:34:00,808 INFO L125 PetriNetUnfolderBase]: For 452145/452152 co-relation queries the response was YES. [2024-06-27 19:34:00,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100972 conditions, 15583 events. 10350/15583 cut-off events. For 452145/452152 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 105042 event pairs, 3641 based on Foata normal form. 7/15582 useless extension candidates. Maximal degree in co-relation 100862. Up to 14377 conditions per place. [2024-06-27 19:34:00,978 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 206 selfloop transitions, 110 changer transitions 0/325 dead transitions. [2024-06-27 19:34:00,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 325 transitions, 4881 flow [2024-06-27 19:34:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 19:34:00,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-27 19:34:00,980 INFO L175 Difference]: Start difference. First operand has 219 places, 271 transitions, 3563 flow. Second operand 6 states and 184 transitions. [2024-06-27 19:34:00,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 325 transitions, 4881 flow [2024-06-27 19:34:03,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 4824 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 19:34:03,872 INFO L231 Difference]: Finished difference. Result has 224 places, 303 transitions, 4369 flow [2024-06-27 19:34:03,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4369, PETRI_PLACES=224, PETRI_TRANSITIONS=303} [2024-06-27 19:34:03,872 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 172 predicate places. [2024-06-27 19:34:03,873 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 303 transitions, 4369 flow [2024-06-27 19:34:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:03,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:03,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:03,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:34:03,874 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:34:03,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash -688533393, now seen corresponding path program 2 times [2024-06-27 19:34:03,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:03,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841788245] [2024-06-27 19:34:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:03,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841788245] [2024-06-27 19:34:03,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841788245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:03,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:03,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:03,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942624783] [2024-06-27 19:34:03,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:03,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:03,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:03,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:04,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:34:04,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 303 transitions, 4369 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:04,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:04,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:34:04,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:06,453 INFO L124 PetriNetUnfolderBase]: 10326/15553 cut-off events. [2024-06-27 19:34:06,453 INFO L125 PetriNetUnfolderBase]: For 488836/488843 co-relation queries the response was YES. [2024-06-27 19:34:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106145 conditions, 15553 events. 10326/15553 cut-off events. For 488836/488843 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 104893 event pairs, 3641 based on Foata normal form. 7/15552 useless extension candidates. Maximal degree in co-relation 106032. Up to 14353 conditions per place. [2024-06-27 19:34:06,882 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 206 selfloop transitions, 112 changer transitions 0/327 dead transitions. [2024-06-27 19:34:06,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 327 transitions, 5143 flow [2024-06-27 19:34:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 19:34:06,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064139941690962 [2024-06-27 19:34:06,883 INFO L175 Difference]: Start difference. First operand has 224 places, 303 transitions, 4369 flow. Second operand 7 states and 208 transitions. [2024-06-27 19:34:06,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 327 transitions, 5143 flow [2024-06-27 19:34:09,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4886 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:09,744 INFO L231 Difference]: Finished difference. Result has 228 places, 305 transitions, 4404 flow [2024-06-27 19:34:09,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4404, PETRI_PLACES=228, PETRI_TRANSITIONS=305} [2024-06-27 19:34:09,744 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-27 19:34:09,744 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 4404 flow [2024-06-27 19:34:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:09,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:09,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:09,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:34:09,745 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:34:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -688981839, now seen corresponding path program 1 times [2024-06-27 19:34:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:09,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874297915] [2024-06-27 19:34:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:09,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:09,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874297915] [2024-06-27 19:34:09,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874297915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:09,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:09,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:09,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380874205] [2024-06-27 19:34:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:09,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-27 19:34:09,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 4404 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:09,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:09,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-27 19:34:09,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:12,347 INFO L124 PetriNetUnfolderBase]: 10329/15599 cut-off events. [2024-06-27 19:34:12,348 INFO L125 PetriNetUnfolderBase]: For 514373/514384 co-relation queries the response was YES. [2024-06-27 19:34:12,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104881 conditions, 15599 events. 10329/15599 cut-off events. For 514373/514384 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 105792 event pairs, 2856 based on Foata normal form. 56/15440 useless extension candidates. Maximal degree in co-relation 104767. Up to 13471 conditions per place. [2024-06-27 19:34:12,534 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 242 selfloop transitions, 66 changer transitions 0/351 dead transitions. [2024-06-27 19:34:12,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 351 transitions, 5402 flow [2024-06-27 19:34:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 19:34:12,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-27 19:34:12,536 INFO L175 Difference]: Start difference. First operand has 228 places, 305 transitions, 4404 flow. Second operand 6 states and 190 transitions. [2024-06-27 19:34:12,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 351 transitions, 5402 flow [2024-06-27 19:34:14,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 351 transitions, 5128 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:14,524 INFO L231 Difference]: Finished difference. Result has 228 places, 316 transitions, 4466 flow [2024-06-27 19:34:14,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4466, PETRI_PLACES=228, PETRI_TRANSITIONS=316} [2024-06-27 19:34:14,524 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-27 19:34:14,524 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 316 transitions, 4466 flow [2024-06-27 19:34:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:14,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:14,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:14,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:34:14,525 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:34:14,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2034087527, now seen corresponding path program 3 times [2024-06-27 19:34:14,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:14,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019782713] [2024-06-27 19:34:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019782713] [2024-06-27 19:34:14,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019782713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:14,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:14,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122180908] [2024-06-27 19:34:14,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:14,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:14,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:14,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:34:14,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 316 transitions, 4466 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:14,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:14,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:34:14,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:16,961 INFO L124 PetriNetUnfolderBase]: 10655/16071 cut-off events. [2024-06-27 19:34:16,961 INFO L125 PetriNetUnfolderBase]: For 466791/466794 co-relation queries the response was YES. [2024-06-27 19:34:17,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108939 conditions, 16071 events. 10655/16071 cut-off events. For 466791/466794 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 108877 event pairs, 3696 based on Foata normal form. 1/16065 useless extension candidates. Maximal degree in co-relation 108825. Up to 14957 conditions per place. [2024-06-27 19:34:17,483 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 277 selfloop transitions, 77 changer transitions 0/363 dead transitions. [2024-06-27 19:34:17,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 363 transitions, 5639 flow [2024-06-27 19:34:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-27 19:34:17,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5600907029478458 [2024-06-27 19:34:17,485 INFO L175 Difference]: Start difference. First operand has 228 places, 316 transitions, 4466 flow. Second operand 9 states and 247 transitions. [2024-06-27 19:34:17,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 363 transitions, 5639 flow [2024-06-27 19:34:19,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 363 transitions, 5549 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 19:34:19,962 INFO L231 Difference]: Finished difference. Result has 237 places, 334 transitions, 4913 flow [2024-06-27 19:34:19,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4913, PETRI_PLACES=237, PETRI_TRANSITIONS=334} [2024-06-27 19:34:19,962 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2024-06-27 19:34:19,963 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 334 transitions, 4913 flow [2024-06-27 19:34:19,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:19,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:19,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:34:19,963 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:34:19,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1947195419, now seen corresponding path program 4 times [2024-06-27 19:34:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:19,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928983466] [2024-06-27 19:34:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:19,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:20,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:20,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928983466] [2024-06-27 19:34:20,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928983466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:20,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:20,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410321529] [2024-06-27 19:34:20,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:20,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:20,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-27 19:34:20,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 334 transitions, 4913 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:20,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:20,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-27 19:34:20,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:22,819 INFO L124 PetriNetUnfolderBase]: 10662/16052 cut-off events. [2024-06-27 19:34:22,819 INFO L125 PetriNetUnfolderBase]: For 493486/493489 co-relation queries the response was YES. [2024-06-27 19:34:22,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111408 conditions, 16052 events. 10662/16052 cut-off events. For 493486/493489 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 108529 event pairs, 3656 based on Foata normal form. 1/16046 useless extension candidates. Maximal degree in co-relation 111290. Up to 14965 conditions per place.