./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 --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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:55:33,339 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:55:33,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:55:33,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:55:33,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:55:33,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:55:33,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:55:33,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:55:33,423 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:55:33,424 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:55:33,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:55:33,424 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:55:33,425 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:55:33,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:55:33,425 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:55:33,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:55:33,426 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:55:33,426 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:55:33,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:55:33,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:55:33,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:55:33,428 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:55:33,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:55:33,428 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:55:33,429 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:55:33,429 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:55:33,429 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:55:33,429 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:55:33,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:55:33,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:55:33,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:55:33,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:55:33,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:55:33,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:55:33,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:55:33,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:55:33,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:55:33,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:55:33,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:55:33,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:55:33,433 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:55:33,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:55:33,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:55:33,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:55:33,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:55:33,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:55:33,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:55:33,611 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:55:33,612 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:55:33,613 INFO L431 ainManager$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 17:55:33,730 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:55:33,731 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:55:33,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:55:34,726 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:55:34,924 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:55:34,925 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:55:34,936 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38db820ca/dd1032e4735345e3948b49bb64b8e40e/FLAG4d9e76988 [2024-06-27 17:55:34,953 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38db820ca/dd1032e4735345e3948b49bb64b8e40e [2024-06-27 17:55:34,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:55:34,955 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:55:34,955 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:55:34,955 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:55:34,963 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:55:34,964 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:55:33" (1/2) ... [2024-06-27 17:55:34,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22324630 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:55:34, skipping insertion in model container [2024-06-27 17:55:34,965 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:55:33" (1/2) ... [2024-06-27 17:55:34,966 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@360775a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:55:34, skipping insertion in model container [2024-06-27 17:55:34,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:55:34" (2/2) ... [2024-06-27 17:55:34,966 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22324630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:34, skipping insertion in model container [2024-06-27 17:55:34,966 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:55:34" (2/2) ... [2024-06-27 17:55:34,966 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:55:35,014 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:55:35,015 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 17:55:35,015 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 17:55:35,015 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 17:55:35,015 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 17:55:35,016 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:55:35,016 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-27 17:55:35,051 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:55:35,181 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:55:35,279 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:55:35,285 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:55:35,310 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:55:35,356 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:55:35,387 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:55:35,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35 WrapperNode [2024-06-27 17:55:35,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:55:35,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:55:35,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:55:35,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:55:35,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,422 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,450 INFO L138 Inliner]: procedures = 176, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-06-27 17:55:35,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:55:35,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:55:35,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:55:35,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:55:35,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,470 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 17:55:35,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,475 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,476 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,477 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:55:35,481 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:55:35,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:55:35,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:55:35,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (1/1) ... [2024-06-27 17:55:35,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:55:35,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:55:35,502 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 17:55:35,504 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 17:55:35,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:55:35,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:55:35,535 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:55:35,535 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:55:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:55:35,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:55:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:55:35,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:55:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 17:55:35,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 17:55:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:55:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:55:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:55:35,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:55:35,537 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 17:55:35,622 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:55:35,624 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:55:35,816 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:55:35,817 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:55:35,885 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:55:35,888 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:55:35,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:55:35 BoogieIcfgContainer [2024-06-27 17:55:35,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:55:35,890 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:55:35,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:55:35,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:55:35,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:55:33" (1/4) ... [2024-06-27 17:55:35,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184015e5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:55:35, skipping insertion in model container [2024-06-27 17:55:35,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:55:34" (2/4) ... [2024-06-27 17:55:35,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184015e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:55:35, skipping insertion in model container [2024-06-27 17:55:35,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:55:35" (3/4) ... [2024-06-27 17:55:35,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184015e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:55:35, skipping insertion in model container [2024-06-27 17:55:35,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:55:35" (4/4) ... [2024-06-27 17:55:35,897 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:55:35,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:55:35,914 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 17:55:35,914 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:55:35,958 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:55:35,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 54 transitions, 124 flow [2024-06-27 17:55:36,018 INFO L124 PetriNetUnfolderBase]: 1/50 cut-off events. [2024-06-27 17:55:36,018 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:55:36,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 1/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-06-27 17:55:36,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 54 transitions, 124 flow [2024-06-27 17:55:36,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 47 transitions, 106 flow [2024-06-27 17:55:36,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:55:36,046 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;@57399e1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:55:36,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 17:55:36,053 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:55:36,053 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:55:36,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:55:36,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:36,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:55:36,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:36,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 220131546, now seen corresponding path program 1 times [2024-06-27 17:55:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:36,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940174889] [2024-06-27 17:55:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:36,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:36,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:36,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940174889] [2024-06-27 17:55:36,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940174889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:36,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:36,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:55:36,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541013185] [2024-06-27 17:55:36,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:36,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:55:36,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:55:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:55:36,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-06-27 17:55:36,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:36,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:36,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-06-27 17:55:36,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:36,831 INFO L124 PetriNetUnfolderBase]: 2263/3407 cut-off events. [2024-06-27 17:55:36,832 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-27 17:55:36,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6701 conditions, 3407 events. 2263/3407 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20246 event pairs, 1604 based on Foata normal form. 1/3334 useless extension candidates. Maximal degree in co-relation 6688. Up to 3171 conditions per place. [2024-06-27 17:55:36,856 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 39 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2024-06-27 17:55:36,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 235 flow [2024-06-27 17:55:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:55:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:55:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-06-27 17:55:36,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-06-27 17:55:36,867 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 106 flow. Second operand 3 states and 120 transitions. [2024-06-27 17:55:36,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 235 flow [2024-06-27 17:55:36,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:36,874 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 141 flow [2024-06-27 17:55:36,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-27 17:55:36,878 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-06-27 17:55:36,879 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 141 flow [2024-06-27 17:55:36,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:36,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:36,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:36,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:55:36,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:36,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:36,880 INFO L85 PathProgramCache]: Analyzing trace with hash -375903302, now seen corresponding path program 1 times [2024-06-27 17:55:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:36,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393510441] [2024-06-27 17:55:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:36,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:37,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393510441] [2024-06-27 17:55:37,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393510441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:37,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:37,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:37,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221524608] [2024-06-27 17:55:37,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:37,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:37,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:37,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:37,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:37,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:37,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:55:37,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:37,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:37,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:37,575 INFO L124 PetriNetUnfolderBase]: 3891/5899 cut-off events. [2024-06-27 17:55:37,575 INFO L125 PetriNetUnfolderBase]: For 1204/1412 co-relation queries the response was YES. [2024-06-27 17:55:37,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13229 conditions, 5899 events. 3891/5899 cut-off events. For 1204/1412 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35903 event pairs, 1913 based on Foata normal form. 35/5807 useless extension candidates. Maximal degree in co-relation 13217. Up to 5093 conditions per place. [2024-06-27 17:55:37,611 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 57 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2024-06-27 17:55:37,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 345 flow [2024-06-27 17:55:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-06-27 17:55:37,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-06-27 17:55:37,614 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 141 flow. Second operand 4 states and 156 transitions. [2024-06-27 17:55:37,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 345 flow [2024-06-27 17:55:37,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:55:37,616 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 168 flow [2024-06-27 17:55:37,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2024-06-27 17:55:37,617 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-06-27 17:55:37,617 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 168 flow [2024-06-27 17:55:37,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:55:37,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:37,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:37,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:55:37,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:37,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:37,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2070043834, now seen corresponding path program 1 times [2024-06-27 17:55:37,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:37,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482865238] [2024-06-27 17:55:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:37,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:37,750 INFO 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 17:55:37,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:37,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482865238] [2024-06-27 17:55:37,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482865238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:37,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:37,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:55:37,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972540637] [2024-06-27 17:55:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:55:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:55:37,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:55:37,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:37,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:37,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:37,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:37,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:38,181 INFO L124 PetriNetUnfolderBase]: 4154/6426 cut-off events. [2024-06-27 17:55:38,181 INFO L125 PetriNetUnfolderBase]: For 2728/2776 co-relation queries the response was YES. [2024-06-27 17:55:38,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15201 conditions, 6426 events. 4154/6426 cut-off events. For 2728/2776 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39600 event pairs, 2380 based on Foata normal form. 3/6359 useless extension candidates. Maximal degree in co-relation 15187. Up to 5696 conditions per place. [2024-06-27 17:55:38,212 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 55 selfloop transitions, 9 changer transitions 0/81 dead transitions. [2024-06-27 17:55:38,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 376 flow [2024-06-27 17:55:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-06-27 17:55:38,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6898148148148148 [2024-06-27 17:55:38,214 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 168 flow. Second operand 4 states and 149 transitions. [2024-06-27 17:55:38,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 376 flow [2024-06-27 17:55:38,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:38,221 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 228 flow [2024-06-27 17:55:38,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-27 17:55:38,222 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-06-27 17:55:38,223 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 228 flow [2024-06-27 17:55:38,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:38,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:38,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:55:38,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:38,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash -742208091, now seen corresponding path program 1 times [2024-06-27 17:55:38,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:38,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636570167] [2024-06-27 17:55:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:38,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636570167] [2024-06-27 17:55:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636570167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:38,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:38,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:38,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195855030] [2024-06-27 17:55:38,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:38,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:38,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:38,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:38,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:38,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:38,920 INFO L124 PetriNetUnfolderBase]: 4139/6257 cut-off events. [2024-06-27 17:55:38,921 INFO L125 PetriNetUnfolderBase]: For 4617/4669 co-relation queries the response was YES. [2024-06-27 17:55:38,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16604 conditions, 6257 events. 4139/6257 cut-off events. For 4617/4669 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37996 event pairs, 1846 based on Foata normal form. 6/6206 useless extension candidates. Maximal degree in co-relation 16588. Up to 5637 conditions per place. [2024-06-27 17:55:38,956 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 65 selfloop transitions, 12 changer transitions 0/94 dead transitions. [2024-06-27 17:55:38,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 474 flow [2024-06-27 17:55:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-06-27 17:55:38,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:55:38,958 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 228 flow. Second operand 5 states and 184 transitions. [2024-06-27 17:55:38,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 474 flow [2024-06-27 17:55:38,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 470 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:38,963 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 280 flow [2024-06-27 17:55:38,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-06-27 17:55:38,964 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2024-06-27 17:55:38,965 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 280 flow [2024-06-27 17:55:38,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:38,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:55:38,965 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:38,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1166629309, now seen corresponding path program 1 times [2024-06-27 17:55:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436091441] [2024-06-27 17:55:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:39,131 INFO 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 17:55:39,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436091441] [2024-06-27 17:55:39,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436091441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:39,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:39,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389427207] [2024-06-27 17:55:39,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:39,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:39,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:39,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:55:39,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:39,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:39,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:39,726 INFO L124 PetriNetUnfolderBase]: 5356/7946 cut-off events. [2024-06-27 17:55:39,726 INFO L125 PetriNetUnfolderBase]: For 8759/8807 co-relation queries the response was YES. [2024-06-27 17:55:39,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22643 conditions, 7946 events. 5356/7946 cut-off events. For 8759/8807 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 47877 event pairs, 1862 based on Foata normal form. 16/7918 useless extension candidates. Maximal degree in co-relation 22624. Up to 7111 conditions per place. [2024-06-27 17:55:39,762 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 61 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2024-06-27 17:55:39,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 538 flow [2024-06-27 17:55:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-06-27 17:55:39,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-27 17:55:39,764 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 280 flow. Second operand 4 states and 152 transitions. [2024-06-27 17:55:39,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 538 flow [2024-06-27 17:55:39,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 508 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:39,772 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 348 flow [2024-06-27 17:55:39,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-27 17:55:39,773 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-06-27 17:55:39,773 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 348 flow [2024-06-27 17:55:39,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:55:39,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:39,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:39,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:55:39,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:39,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1166749279, now seen corresponding path program 2 times [2024-06-27 17:55:39,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:39,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803972842] [2024-06-27 17:55:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:39,875 INFO 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 17:55:39,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:39,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803972842] [2024-06-27 17:55:39,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803972842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:39,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:39,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:39,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897725461] [2024-06-27 17:55:39,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:39,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:39,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:39,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:39,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:55:39,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:39,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:39,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:40,518 INFO L124 PetriNetUnfolderBase]: 5347/8259 cut-off events. [2024-06-27 17:55:40,522 INFO L125 PetriNetUnfolderBase]: For 14372/14562 co-relation queries the response was YES. [2024-06-27 17:55:40,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25746 conditions, 8259 events. 5347/8259 cut-off events. For 14372/14562 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 52293 event pairs, 2667 based on Foata normal form. 18/8174 useless extension candidates. Maximal degree in co-relation 25726. Up to 7179 conditions per place. [2024-06-27 17:55:40,559 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 76 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-27 17:55:40,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 710 flow [2024-06-27 17:55:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-06-27 17:55:40,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:55:40,561 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 348 flow. Second operand 5 states and 184 transitions. [2024-06-27 17:55:40,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 710 flow [2024-06-27 17:55:40,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 112 transitions, 644 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:40,578 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 463 flow [2024-06-27 17:55:40,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-27 17:55:40,581 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2024-06-27 17:55:40,581 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 463 flow [2024-06-27 17:55:40,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:55:40,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:40,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:40,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:55:40,582 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:40,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash -846851332, now seen corresponding path program 1 times [2024-06-27 17:55:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:40,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643642487] [2024-06-27 17:55:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:40,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:40,782 INFO 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 17:55:40,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643642487] [2024-06-27 17:55:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643642487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:40,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:40,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:40,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041391187] [2024-06-27 17:55:40,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:40,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:40,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:40,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:40,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:40,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:40,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 463 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:40,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:40,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:40,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:41,610 INFO L124 PetriNetUnfolderBase]: 7424/11243 cut-off events. [2024-06-27 17:55:41,610 INFO L125 PetriNetUnfolderBase]: For 26568/26779 co-relation queries the response was YES. [2024-06-27 17:55:41,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37635 conditions, 11243 events. 7424/11243 cut-off events. For 26568/26779 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 72790 event pairs, 1784 based on Foata normal form. 104/11204 useless extension candidates. Maximal degree in co-relation 37612. Up to 7434 conditions per place. [2024-06-27 17:55:41,764 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 97 selfloop transitions, 34 changer transitions 0/147 dead transitions. [2024-06-27 17:55:41,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 147 transitions, 997 flow [2024-06-27 17:55:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 236 transitions. [2024-06-27 17:55:41,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2024-06-27 17:55:41,766 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 463 flow. Second operand 6 states and 236 transitions. [2024-06-27 17:55:41,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 147 transitions, 997 flow [2024-06-27 17:55:41,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 147 transitions, 965 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:41,788 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 610 flow [2024-06-27 17:55:41,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=610, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-27 17:55:41,789 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 22 predicate places. [2024-06-27 17:55:41,789 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 610 flow [2024-06-27 17:55:41,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:41,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:41,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:41,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:55:41,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:41,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:41,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1951895674, now seen corresponding path program 2 times [2024-06-27 17:55:41,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:41,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228795212] [2024-06-27 17:55:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:41,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:41,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:41,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228795212] [2024-06-27 17:55:41,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228795212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:41,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:41,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:41,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805132015] [2024-06-27 17:55:41,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:41,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:41,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:41,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 610 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:41,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:41,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:41,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:42,682 INFO L124 PetriNetUnfolderBase]: 7154/10697 cut-off events. [2024-06-27 17:55:42,682 INFO L125 PetriNetUnfolderBase]: For 35227/35458 co-relation queries the response was YES. [2024-06-27 17:55:42,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39126 conditions, 10697 events. 7154/10697 cut-off events. For 35227/35458 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 68227 event pairs, 2009 based on Foata normal form. 122/10718 useless extension candidates. Maximal degree in co-relation 39099. Up to 8506 conditions per place. [2024-06-27 17:55:42,744 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 85 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-06-27 17:55:42,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 980 flow [2024-06-27 17:55:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-06-27 17:55:42,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-27 17:55:42,747 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 610 flow. Second operand 5 states and 192 transitions. [2024-06-27 17:55:42,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 980 flow [2024-06-27 17:55:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 130 transitions, 928 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:42,798 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 662 flow [2024-06-27 17:55:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=662, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2024-06-27 17:55:42,799 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2024-06-27 17:55:42,799 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 662 flow [2024-06-27 17:55:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:42,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:42,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:55:42,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 259646238, now seen corresponding path program 3 times [2024-06-27 17:55:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802605785] [2024-06-27 17:55:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:42,909 INFO 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 17:55:42,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802605785] [2024-06-27 17:55:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802605785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:42,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:42,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148648744] [2024-06-27 17:55:42,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:42,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:42,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:42,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 662 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:42,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:42,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:42,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:43,794 INFO L124 PetriNetUnfolderBase]: 7269/11193 cut-off events. [2024-06-27 17:55:43,795 INFO L125 PetriNetUnfolderBase]: For 37555/37840 co-relation queries the response was YES. [2024-06-27 17:55:43,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40739 conditions, 11193 events. 7269/11193 cut-off events. For 37555/37840 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 73958 event pairs, 3097 based on Foata normal form. 34/11081 useless extension candidates. Maximal degree in co-relation 40710. Up to 9705 conditions per place. [2024-06-27 17:55:43,871 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 99 selfloop transitions, 22 changer transitions 0/137 dead transitions. [2024-06-27 17:55:43,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 137 transitions, 1048 flow [2024-06-27 17:55:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-06-27 17:55:43,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2024-06-27 17:55:43,873 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 662 flow. Second operand 6 states and 220 transitions. [2024-06-27 17:55:43,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 137 transitions, 1048 flow [2024-06-27 17:55:43,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 1000 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:43,940 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 698 flow [2024-06-27 17:55:43,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-06-27 17:55:43,941 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-06-27 17:55:43,941 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 698 flow [2024-06-27 17:55:43,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:43,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:43,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:43,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:55:43,942 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:43,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1115731988, now seen corresponding path program 1 times [2024-06-27 17:55:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:43,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155136674] [2024-06-27 17:55:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:44,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155136674] [2024-06-27 17:55:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155136674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:44,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:44,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:44,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003301775] [2024-06-27 17:55:44,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:44,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:44,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:44,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:44,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:44,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 698 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:44,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:44,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:44,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:44,963 INFO L124 PetriNetUnfolderBase]: 7230/11088 cut-off events. [2024-06-27 17:55:44,963 INFO L125 PetriNetUnfolderBase]: For 40509/40794 co-relation queries the response was YES. [2024-06-27 17:55:44,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40871 conditions, 11088 events. 7230/11088 cut-off events. For 40509/40794 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 72573 event pairs, 2735 based on Foata normal form. 28/10960 useless extension candidates. Maximal degree in co-relation 40841. Up to 9216 conditions per place. [2024-06-27 17:55:45,045 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 99 selfloop transitions, 28 changer transitions 0/143 dead transitions. [2024-06-27 17:55:45,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 143 transitions, 1111 flow [2024-06-27 17:55:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-06-27 17:55:45,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:55:45,047 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 698 flow. Second operand 6 states and 222 transitions. [2024-06-27 17:55:45,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 143 transitions, 1111 flow [2024-06-27 17:55:45,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 143 transitions, 1057 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:45,125 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 752 flow [2024-06-27 17:55:45,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=752, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-27 17:55:45,125 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 30 predicate places. [2024-06-27 17:55:45,125 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 752 flow [2024-06-27 17:55:45,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:55:45,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:45,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:45,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:55:45,126 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:45,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -41276366, now seen corresponding path program 1 times [2024-06-27 17:55:45,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:45,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240403565] [2024-06-27 17:55:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:45,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:45,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:45,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240403565] [2024-06-27 17:55:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240403565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:45,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:45,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:45,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032586982] [2024-06-27 17:55:45,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:45,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:45,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:45,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:45,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:45,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:45,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 752 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:45,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:45,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:45,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:45,928 INFO L124 PetriNetUnfolderBase]: 5825/8926 cut-off events. [2024-06-27 17:55:45,928 INFO L125 PetriNetUnfolderBase]: For 39560/39799 co-relation queries the response was YES. [2024-06-27 17:55:45,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34998 conditions, 8926 events. 5825/8926 cut-off events. For 39560/39799 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 57911 event pairs, 2641 based on Foata normal form. 6/8815 useless extension candidates. Maximal degree in co-relation 34966. Up to 8021 conditions per place. [2024-06-27 17:55:45,993 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 95 selfloop transitions, 20 changer transitions 0/132 dead transitions. [2024-06-27 17:55:45,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 1150 flow [2024-06-27 17:55:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-06-27 17:55:45,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 17:55:45,995 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 752 flow. Second operand 5 states and 181 transitions. [2024-06-27 17:55:45,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 1150 flow [2024-06-27 17:55:46,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 132 transitions, 1091 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:46,043 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 882 flow [2024-06-27 17:55:46,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=882, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-27 17:55:46,043 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 34 predicate places. [2024-06-27 17:55:46,043 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 882 flow [2024-06-27 17:55:46,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:46,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:46,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:46,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:55:46,044 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:46,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1946356509, now seen corresponding path program 1 times [2024-06-27 17:55:46,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:46,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869888303] [2024-06-27 17:55:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:46,114 INFO 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 17:55:46,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869888303] [2024-06-27 17:55:46,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869888303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:46,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:55:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557046164] [2024-06-27 17:55:46,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:46,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:55:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:55:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:55:46,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:46,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 882 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:46,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:46,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:46,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:46,921 INFO L124 PetriNetUnfolderBase]: 8314/12804 cut-off events. [2024-06-27 17:55:46,922 INFO L125 PetriNetUnfolderBase]: For 59026/59232 co-relation queries the response was YES. [2024-06-27 17:55:46,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47739 conditions, 12804 events. 8314/12804 cut-off events. For 59026/59232 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 87204 event pairs, 3852 based on Foata normal form. 49/12589 useless extension candidates. Maximal degree in co-relation 47704. Up to 11080 conditions per place. [2024-06-27 17:55:47,011 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 82 selfloop transitions, 11 changer transitions 0/130 dead transitions. [2024-06-27 17:55:47,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 1174 flow [2024-06-27 17:55:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-06-27 17:55:47,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:55:47,013 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 882 flow. Second operand 4 states and 140 transitions. [2024-06-27 17:55:47,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 1174 flow [2024-06-27 17:55:47,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 130 transitions, 1132 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:47,117 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 963 flow [2024-06-27 17:55:47,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=963, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-06-27 17:55:47,117 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 39 predicate places. [2024-06-27 17:55:47,118 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 963 flow [2024-06-27 17:55:47,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:47,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:47,118 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 17:55:47,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:55:47,118 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:47,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash -435038649, now seen corresponding path program 1 times [2024-06-27 17:55:47,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626008843] [2024-06-27 17:55:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:47,209 INFO 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 17:55:47,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:47,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626008843] [2024-06-27 17:55:47,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626008843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:47,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:47,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:47,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886984341] [2024-06-27 17:55:47,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:47,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:47,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:47,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:47,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 963 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:47,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:47,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:47,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:48,003 INFO L124 PetriNetUnfolderBase]: 7110/11050 cut-off events. [2024-06-27 17:55:48,003 INFO L125 PetriNetUnfolderBase]: For 60669/61015 co-relation queries the response was YES. [2024-06-27 17:55:48,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46239 conditions, 11050 events. 7110/11050 cut-off events. For 60669/61015 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 74619 event pairs, 2761 based on Foata normal form. 60/10955 useless extension candidates. Maximal degree in co-relation 46200. Up to 8915 conditions per place. [2024-06-27 17:55:48,084 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 112 selfloop transitions, 32 changer transitions 0/165 dead transitions. [2024-06-27 17:55:48,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1502 flow [2024-06-27 17:55:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-06-27 17:55:48,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:55:48,086 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 963 flow. Second operand 6 states and 222 transitions. [2024-06-27 17:55:48,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1502 flow [2024-06-27 17:55:48,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 165 transitions, 1498 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:48,188 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1133 flow [2024-06-27 17:55:48,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1133, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-27 17:55:48,189 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2024-06-27 17:55:48,189 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1133 flow [2024-06-27 17:55:48,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:48,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:48,190 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 17:55:48,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:55:48,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:48,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -432181689, now seen corresponding path program 2 times [2024-06-27 17:55:48,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:48,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512120175] [2024-06-27 17:55:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:48,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:48,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:48,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512120175] [2024-06-27 17:55:48,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512120175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:48,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:48,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:55:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865701499] [2024-06-27 17:55:48,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:48,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:55:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:55:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:55:48,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:48,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1133 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:48,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:48,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:48,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:49,179 INFO L124 PetriNetUnfolderBase]: 7034/11012 cut-off events. [2024-06-27 17:55:49,179 INFO L125 PetriNetUnfolderBase]: For 69644/69990 co-relation queries the response was YES. [2024-06-27 17:55:49,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47266 conditions, 11012 events. 7034/11012 cut-off events. For 69644/69990 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 75208 event pairs, 3040 based on Foata normal form. 68/10925 useless extension candidates. Maximal degree in co-relation 47223. Up to 9447 conditions per place. [2024-06-27 17:55:49,257 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 110 selfloop transitions, 26 changer transitions 0/157 dead transitions. [2024-06-27 17:55:49,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 157 transitions, 1505 flow [2024-06-27 17:55:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-06-27 17:55:49,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6635802469135802 [2024-06-27 17:55:49,259 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1133 flow. Second operand 6 states and 215 transitions. [2024-06-27 17:55:49,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 157 transitions, 1505 flow [2024-06-27 17:55:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1423 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:49,410 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 1111 flow [2024-06-27 17:55:49,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1111, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2024-06-27 17:55:49,411 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2024-06-27 17:55:49,411 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 1111 flow [2024-06-27 17:55:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:49,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:49,412 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 17:55:49,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:55:49,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:49,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash -167366265, now seen corresponding path program 1 times [2024-06-27 17:55:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:49,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513379060] [2024-06-27 17:55:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:49,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513379060] [2024-06-27 17:55:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513379060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:49,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861119626] [2024-06-27 17:55:49,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:49,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:49,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:49,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 1111 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:49,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:49,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:49,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:50,526 INFO L124 PetriNetUnfolderBase]: 8650/13324 cut-off events. [2024-06-27 17:55:50,527 INFO L125 PetriNetUnfolderBase]: For 77378/77752 co-relation queries the response was YES. [2024-06-27 17:55:50,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55578 conditions, 13324 events. 8650/13324 cut-off events. For 77378/77752 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 90642 event pairs, 3398 based on Foata normal form. 36/13122 useless extension candidates. Maximal degree in co-relation 55534. Up to 11515 conditions per place. [2024-06-27 17:55:50,622 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 95 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-06-27 17:55:50,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1507 flow [2024-06-27 17:55:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:50,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-06-27 17:55:50,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 17:55:50,623 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 1111 flow. Second operand 5 states and 183 transitions. [2024-06-27 17:55:50,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1507 flow [2024-06-27 17:55:50,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 154 transitions, 1451 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:50,762 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 1205 flow [2024-06-27 17:55:50,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1205, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2024-06-27 17:55:50,762 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-06-27 17:55:50,762 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 1205 flow [2024-06-27 17:55:50,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:50,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:50,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:50,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:55:50,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:50,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 817520029, now seen corresponding path program 2 times [2024-06-27 17:55:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753435285] [2024-06-27 17:55:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:50,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:50,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753435285] [2024-06-27 17:55:50,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753435285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:50,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:50,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:50,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120522116] [2024-06-27 17:55:50,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:50,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:50,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:50,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 1205 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:50,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:50,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:50,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:51,891 INFO L124 PetriNetUnfolderBase]: 8718/12830 cut-off events. [2024-06-27 17:55:51,892 INFO L125 PetriNetUnfolderBase]: For 85738/86446 co-relation queries the response was YES. [2024-06-27 17:55:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58126 conditions, 12830 events. 8718/12830 cut-off events. For 85738/86446 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 82108 event pairs, 2500 based on Foata normal form. 94/12743 useless extension candidates. Maximal degree in co-relation 58081. Up to 11536 conditions per place. [2024-06-27 17:55:51,985 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 103 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-27 17:55:51,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 172 transitions, 1775 flow [2024-06-27 17:55:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 218 transitions. [2024-06-27 17:55:51,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6728395061728395 [2024-06-27 17:55:51,987 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 1205 flow. Second operand 6 states and 218 transitions. [2024-06-27 17:55:51,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 172 transitions, 1775 flow [2024-06-27 17:55:52,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 172 transitions, 1673 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:52,157 INFO L231 Difference]: Finished difference. Result has 113 places, 132 transitions, 1330 flow [2024-06-27 17:55:52,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1330, PETRI_PLACES=113, PETRI_TRANSITIONS=132} [2024-06-27 17:55:52,158 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 53 predicate places. [2024-06-27 17:55:52,158 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 132 transitions, 1330 flow [2024-06-27 17:55:52,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:52,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:52,159 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 17:55:52,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:55:52,159 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:52,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2094359849, now seen corresponding path program 3 times [2024-06-27 17:55:52,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:52,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841059458] [2024-06-27 17:55:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:52,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:52,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:52,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841059458] [2024-06-27 17:55:52,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841059458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:52,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:52,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:52,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318669721] [2024-06-27 17:55:52,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:52,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:52,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:52,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:52,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:52,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 132 transitions, 1330 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:52,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:52,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:52,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:53,270 INFO L124 PetriNetUnfolderBase]: 8756/13487 cut-off events. [2024-06-27 17:55:53,270 INFO L125 PetriNetUnfolderBase]: For 103324/103909 co-relation queries the response was YES. [2024-06-27 17:55:53,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61829 conditions, 13487 events. 8756/13487 cut-off events. For 103324/103909 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 92123 event pairs, 3402 based on Foata normal form. 87/13335 useless extension candidates. Maximal degree in co-relation 61783. Up to 11584 conditions per place. [2024-06-27 17:55:53,383 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 101 selfloop transitions, 55 changer transitions 0/174 dead transitions. [2024-06-27 17:55:53,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 174 transitions, 1858 flow [2024-06-27 17:55:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-06-27 17:55:53,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:55:53,385 INFO L175 Difference]: Start difference. First operand has 113 places, 132 transitions, 1330 flow. Second operand 6 states and 216 transitions. [2024-06-27 17:55:53,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 174 transitions, 1858 flow [2024-06-27 17:55:53,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 174 transitions, 1759 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:53,591 INFO L231 Difference]: Finished difference. Result has 117 places, 136 transitions, 1412 flow [2024-06-27 17:55:53,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1412, PETRI_PLACES=117, PETRI_TRANSITIONS=136} [2024-06-27 17:55:53,592 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 57 predicate places. [2024-06-27 17:55:53,592 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 136 transitions, 1412 flow [2024-06-27 17:55:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:53,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:53,592 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 17:55:53,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:55:53,593 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:53,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash 989269639, now seen corresponding path program 4 times [2024-06-27 17:55:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:53,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944838221] [2024-06-27 17:55:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:53,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:53,690 INFO 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 17:55:53,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:53,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944838221] [2024-06-27 17:55:53,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944838221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:53,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:53,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543825457] [2024-06-27 17:55:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:53,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:55:53,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 136 transitions, 1412 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:53,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:53,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:55:53,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:54,796 INFO L124 PetriNetUnfolderBase]: 8700/12822 cut-off events. [2024-06-27 17:55:54,796 INFO L125 PetriNetUnfolderBase]: For 102998/103761 co-relation queries the response was YES. [2024-06-27 17:55:54,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61329 conditions, 12822 events. 8700/12822 cut-off events. For 102998/103761 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 82305 event pairs, 2482 based on Foata normal form. 30/12671 useless extension candidates. Maximal degree in co-relation 61281. Up to 11582 conditions per place. [2024-06-27 17:55:54,898 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 109 selfloop transitions, 41 changer transitions 0/168 dead transitions. [2024-06-27 17:55:54,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 168 transitions, 1794 flow [2024-06-27 17:55:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-06-27 17:55:54,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:55:54,899 INFO L175 Difference]: Start difference. First operand has 117 places, 136 transitions, 1412 flow. Second operand 5 states and 185 transitions. [2024-06-27 17:55:54,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 168 transitions, 1794 flow [2024-06-27 17:55:55,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 168 transitions, 1639 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:55,226 INFO L231 Difference]: Finished difference. Result has 119 places, 136 transitions, 1353 flow [2024-06-27 17:55:55,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1353, PETRI_PLACES=119, PETRI_TRANSITIONS=136} [2024-06-27 17:55:55,227 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 59 predicate places. [2024-06-27 17:55:55,227 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 136 transitions, 1353 flow [2024-06-27 17:55:55,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:55:55,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:55,227 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 17:55:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:55:55,228 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:55,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1025315132, now seen corresponding path program 1 times [2024-06-27 17:55:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358015024] [2024-06-27 17:55:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:55,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358015024] [2024-06-27 17:55:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358015024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415432438] [2024-06-27 17:55:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:55,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:55,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 136 transitions, 1353 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:55,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:55,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:56,483 INFO L124 PetriNetUnfolderBase]: 8575/13051 cut-off events. [2024-06-27 17:55:56,484 INFO L125 PetriNetUnfolderBase]: For 114015/114353 co-relation queries the response was YES. [2024-06-27 17:55:56,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58656 conditions, 13051 events. 8575/13051 cut-off events. For 114015/114353 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 88436 event pairs, 3610 based on Foata normal form. 122/12866 useless extension candidates. Maximal degree in co-relation 58607. Up to 11334 conditions per place. [2024-06-27 17:55:56,602 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 93 selfloop transitions, 27 changer transitions 0/159 dead transitions. [2024-06-27 17:55:56,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 159 transitions, 1681 flow [2024-06-27 17:55:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:55:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:55:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-06-27 17:55:56,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:55:56,603 INFO L175 Difference]: Start difference. First operand has 119 places, 136 transitions, 1353 flow. Second operand 4 states and 144 transitions. [2024-06-27 17:55:56,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 159 transitions, 1681 flow [2024-06-27 17:55:56,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 159 transitions, 1566 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:56,825 INFO L231 Difference]: Finished difference. Result has 118 places, 142 transitions, 1366 flow [2024-06-27 17:55:56,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1366, PETRI_PLACES=118, PETRI_TRANSITIONS=142} [2024-06-27 17:55:56,825 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 58 predicate places. [2024-06-27 17:55:56,825 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 142 transitions, 1366 flow [2024-06-27 17:55:56,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:56,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:56,826 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 17:55:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:55:56,826 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:56,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2122141598, now seen corresponding path program 2 times [2024-06-27 17:55:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:56,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896477906] [2024-06-27 17:55:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:56,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896477906] [2024-06-27 17:55:56,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896477906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:56,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:56,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:56,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494437986] [2024-06-27 17:55:56,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:56,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:56,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:56,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:56,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:55:56,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 142 transitions, 1366 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:56,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:56,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:55:56,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:58,054 INFO L124 PetriNetUnfolderBase]: 8548/13034 cut-off events. [2024-06-27 17:55:58,054 INFO L125 PetriNetUnfolderBase]: For 122659/122974 co-relation queries the response was YES. [2024-06-27 17:55:58,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62011 conditions, 13034 events. 8548/13034 cut-off events. For 122659/122974 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 88472 event pairs, 3616 based on Foata normal form. 111/12860 useless extension candidates. Maximal degree in co-relation 61961. Up to 11371 conditions per place. [2024-06-27 17:55:58,171 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 105 selfloop transitions, 29 changer transitions 0/173 dead transitions. [2024-06-27 17:55:58,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1821 flow [2024-06-27 17:55:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 171 transitions. [2024-06-27 17:55:58,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:55:58,173 INFO L175 Difference]: Start difference. First operand has 118 places, 142 transitions, 1366 flow. Second operand 5 states and 171 transitions. [2024-06-27 17:55:58,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1821 flow [2024-06-27 17:55:58,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 173 transitions, 1730 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:58,476 INFO L231 Difference]: Finished difference. Result has 123 places, 155 transitions, 1540 flow [2024-06-27 17:55:58,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1540, PETRI_PLACES=123, PETRI_TRANSITIONS=155} [2024-06-27 17:55:58,477 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2024-06-27 17:55:58,477 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 155 transitions, 1540 flow [2024-06-27 17:55:58,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:58,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:58,477 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 17:55:58,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:55:58,477 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:58,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2127384380, now seen corresponding path program 1 times [2024-06-27 17:55:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:58,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185221031] [2024-06-27 17:55:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:58,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:58,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:58,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185221031] [2024-06-27 17:55:58,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185221031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:58,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:58,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201452321] [2024-06-27 17:55:58,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:55:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 155 transitions, 1540 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:58,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:55:58,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:59,739 INFO L124 PetriNetUnfolderBase]: 9481/13848 cut-off events. [2024-06-27 17:55:59,740 INFO L125 PetriNetUnfolderBase]: For 123342/123342 co-relation queries the response was YES. [2024-06-27 17:55:59,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69164 conditions, 13848 events. 9481/13848 cut-off events. For 123342/123342 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 87260 event pairs, 2841 based on Foata normal form. 1/13842 useless extension candidates. Maximal degree in co-relation 69111. Up to 12945 conditions per place. [2024-06-27 17:55:59,839 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 163 selfloop transitions, 19 changer transitions 0/197 dead transitions. [2024-06-27 17:55:59,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 197 transitions, 2195 flow [2024-06-27 17:55:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-27 17:55:59,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:55:59,841 INFO L175 Difference]: Start difference. First operand has 123 places, 155 transitions, 1540 flow. Second operand 5 states and 170 transitions. [2024-06-27 17:55:59,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 197 transitions, 2195 flow [2024-06-27 17:56:00,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 197 transitions, 2153 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:00,124 INFO L231 Difference]: Finished difference. Result has 130 places, 172 transitions, 1779 flow [2024-06-27 17:56:00,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1779, PETRI_PLACES=130, PETRI_TRANSITIONS=172} [2024-06-27 17:56:00,124 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 70 predicate places. [2024-06-27 17:56:00,124 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 1779 flow [2024-06-27 17:56:00,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:00,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:00,124 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 17:56:00,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:56:00,125 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:00,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -583248866, now seen corresponding path program 2 times [2024-06-27 17:56:00,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:00,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447698700] [2024-06-27 17:56:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:00,192 INFO 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 17:56:00,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447698700] [2024-06-27 17:56:00,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447698700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:00,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:00,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555504203] [2024-06-27 17:56:00,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:00,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:00,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:56:00,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 172 transitions, 1779 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:00,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:00,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:56:00,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:01,347 INFO L124 PetriNetUnfolderBase]: 9477/13849 cut-off events. [2024-06-27 17:56:01,347 INFO L125 PetriNetUnfolderBase]: For 135892/135892 co-relation queries the response was YES. [2024-06-27 17:56:01,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71600 conditions, 13849 events. 9477/13849 cut-off events. For 135892/135892 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 87504 event pairs, 2850 based on Foata normal form. 1/13839 useless extension candidates. Maximal degree in co-relation 71542. Up to 12941 conditions per place. [2024-06-27 17:56:01,468 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 156 selfloop transitions, 20 changer transitions 0/191 dead transitions. [2024-06-27 17:56:01,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 191 transitions, 2182 flow [2024-06-27 17:56:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 17:56:01,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2024-06-27 17:56:01,478 INFO L175 Difference]: Start difference. First operand has 130 places, 172 transitions, 1779 flow. Second operand 5 states and 163 transitions. [2024-06-27 17:56:01,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 191 transitions, 2182 flow [2024-06-27 17:56:01,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 191 transitions, 2118 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:01,836 INFO L231 Difference]: Finished difference. Result has 135 places, 173 transitions, 1771 flow [2024-06-27 17:56:01,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1771, PETRI_PLACES=135, PETRI_TRANSITIONS=173} [2024-06-27 17:56:01,837 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2024-06-27 17:56:01,837 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 173 transitions, 1771 flow [2024-06-27 17:56:01,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:01,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:01,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:01,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:56:01,837 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:01,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:01,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2137872796, now seen corresponding path program 1 times [2024-06-27 17:56:01,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:01,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620006090] [2024-06-27 17:56:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620006090] [2024-06-27 17:56:01,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620006090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:01,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:01,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:56:01,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805502329] [2024-06-27 17:56:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:01,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:56:01,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:56:01,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:56:01,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:56:01,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 173 transitions, 1771 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:01,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:01,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:56:01,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:03,086 INFO L124 PetriNetUnfolderBase]: 8682/13539 cut-off events. [2024-06-27 17:56:03,086 INFO L125 PetriNetUnfolderBase]: For 142552/142691 co-relation queries the response was YES. [2024-06-27 17:56:03,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66885 conditions, 13539 events. 8682/13539 cut-off events. For 142552/142691 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 93538 event pairs, 3806 based on Foata normal form. 73/13357 useless extension candidates. Maximal degree in co-relation 66824. Up to 11452 conditions per place. [2024-06-27 17:56:03,208 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 133 selfloop transitions, 18 changer transitions 0/195 dead transitions. [2024-06-27 17:56:03,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 195 transitions, 2143 flow [2024-06-27 17:56:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-27 17:56:03,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-27 17:56:03,209 INFO L175 Difference]: Start difference. First operand has 135 places, 173 transitions, 1771 flow. Second operand 5 states and 169 transitions. [2024-06-27 17:56:03,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 195 transitions, 2143 flow [2024-06-27 17:56:03,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 195 transitions, 2108 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 17:56:03,542 INFO L231 Difference]: Finished difference. Result has 139 places, 176 transitions, 1811 flow [2024-06-27 17:56:03,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1811, PETRI_PLACES=139, PETRI_TRANSITIONS=176} [2024-06-27 17:56:03,543 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2024-06-27 17:56:03,543 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 176 transitions, 1811 flow [2024-06-27 17:56:03,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:03,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:03,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:03,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:56:03,544 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1306933001, now seen corresponding path program 1 times [2024-06-27 17:56:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273230108] [2024-06-27 17:56:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:03,625 INFO 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 17:56:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:03,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273230108] [2024-06-27 17:56:03,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273230108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:03,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:03,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:03,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992759460] [2024-06-27 17:56:03,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:03,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:03,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:03,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 176 transitions, 1811 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:03,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:03,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:03,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:04,920 INFO L124 PetriNetUnfolderBase]: 9005/13701 cut-off events. [2024-06-27 17:56:04,921 INFO L125 PetriNetUnfolderBase]: For 149743/149769 co-relation queries the response was YES. [2024-06-27 17:56:04,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70635 conditions, 13701 events. 9005/13701 cut-off events. For 149743/149769 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 91488 event pairs, 3887 based on Foata normal form. 16/13575 useless extension candidates. Maximal degree in co-relation 70572. Up to 12125 conditions per place. [2024-06-27 17:56:05,029 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 152 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-06-27 17:56:05,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 205 transitions, 2318 flow [2024-06-27 17:56:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-27 17:56:05,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-27 17:56:05,030 INFO L175 Difference]: Start difference. First operand has 139 places, 176 transitions, 1811 flow. Second operand 5 states and 169 transitions. [2024-06-27 17:56:05,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 205 transitions, 2318 flow [2024-06-27 17:56:05,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 205 transitions, 2277 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:05,325 INFO L231 Difference]: Finished difference. Result has 144 places, 187 transitions, 1983 flow [2024-06-27 17:56:05,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1983, PETRI_PLACES=144, PETRI_TRANSITIONS=187} [2024-06-27 17:56:05,326 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 84 predicate places. [2024-06-27 17:56:05,326 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 187 transitions, 1983 flow [2024-06-27 17:56:05,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:05,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:05,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:56:05,327 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:05,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 896610678, now seen corresponding path program 1 times [2024-06-27 17:56:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:05,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519760833] [2024-06-27 17:56:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:05,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:05,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519760833] [2024-06-27 17:56:05,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519760833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:05,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:05,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:05,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702591355] [2024-06-27 17:56:05,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:05,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:05,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:05,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:05,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 187 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:05,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:05,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:05,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:06,981 INFO L124 PetriNetUnfolderBase]: 10257/15601 cut-off events. [2024-06-27 17:56:06,981 INFO L125 PetriNetUnfolderBase]: For 225226/226417 co-relation queries the response was YES. [2024-06-27 17:56:07,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87990 conditions, 15601 events. 10257/15601 cut-off events. For 225226/226417 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 106923 event pairs, 1758 based on Foata normal form. 190/15488 useless extension candidates. Maximal degree in co-relation 87923. Up to 8622 conditions per place. [2024-06-27 17:56:07,164 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 169 selfloop transitions, 70 changer transitions 0/261 dead transitions. [2024-06-27 17:56:07,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 261 transitions, 3001 flow [2024-06-27 17:56:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2024-06-27 17:56:07,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.708994708994709 [2024-06-27 17:56:07,166 INFO L175 Difference]: Start difference. First operand has 144 places, 187 transitions, 1983 flow. Second operand 7 states and 268 transitions. [2024-06-27 17:56:07,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 261 transitions, 3001 flow [2024-06-27 17:56:07,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 261 transitions, 2959 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-27 17:56:07,723 INFO L231 Difference]: Finished difference. Result has 152 places, 192 transitions, 2223 flow [2024-06-27 17:56:07,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2223, PETRI_PLACES=152, PETRI_TRANSITIONS=192} [2024-06-27 17:56:07,724 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 92 predicate places. [2024-06-27 17:56:07,724 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 192 transitions, 2223 flow [2024-06-27 17:56:07,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:07,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:07,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:07,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:56:07,724 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:07,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:07,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2102671230, now seen corresponding path program 2 times [2024-06-27 17:56:07,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:07,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091612431] [2024-06-27 17:56:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:07,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:07,838 INFO 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 17:56:07,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:07,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091612431] [2024-06-27 17:56:07,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091612431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:07,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:07,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290616339] [2024-06-27 17:56:07,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:07,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:07,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:07,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:07,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 192 transitions, 2223 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:07,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:07,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:07,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:09,376 INFO L124 PetriNetUnfolderBase]: 10089/15195 cut-off events. [2024-06-27 17:56:09,376 INFO L125 PetriNetUnfolderBase]: For 232042/233296 co-relation queries the response was YES. [2024-06-27 17:56:09,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89241 conditions, 15195 events. 10089/15195 cut-off events. For 232042/233296 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 102865 event pairs, 2275 based on Foata normal form. 65/14897 useless extension candidates. Maximal degree in co-relation 89170. Up to 12759 conditions per place. [2024-06-27 17:56:09,529 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 183 selfloop transitions, 33 changer transitions 0/238 dead transitions. [2024-06-27 17:56:09,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 238 transitions, 2839 flow [2024-06-27 17:56:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-06-27 17:56:09,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6697530864197531 [2024-06-27 17:56:09,531 INFO L175 Difference]: Start difference. First operand has 152 places, 192 transitions, 2223 flow. Second operand 6 states and 217 transitions. [2024-06-27 17:56:09,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 238 transitions, 2839 flow [2024-06-27 17:56:10,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 238 transitions, 2759 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:56:10,288 INFO L231 Difference]: Finished difference. Result has 156 places, 192 transitions, 2215 flow [2024-06-27 17:56:10,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2215, PETRI_PLACES=156, PETRI_TRANSITIONS=192} [2024-06-27 17:56:10,289 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 96 predicate places. [2024-06-27 17:56:10,289 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 192 transitions, 2215 flow [2024-06-27 17:56:10,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:10,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:10,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:10,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:56:10,289 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:10,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash -424800740, now seen corresponding path program 3 times [2024-06-27 17:56:10,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:10,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225329871] [2024-06-27 17:56:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:10,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:10,392 INFO 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 17:56:10,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225329871] [2024-06-27 17:56:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225329871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:10,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:10,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090564796] [2024-06-27 17:56:10,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:10,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:10,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 192 transitions, 2215 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:10,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:10,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:10,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:12,088 INFO L124 PetriNetUnfolderBase]: 10630/16234 cut-off events. [2024-06-27 17:56:12,089 INFO L125 PetriNetUnfolderBase]: For 264570/265932 co-relation queries the response was YES. [2024-06-27 17:56:12,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94451 conditions, 16234 events. 10630/16234 cut-off events. For 264570/265932 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 112929 event pairs, 3538 based on Foata normal form. 266/16041 useless extension candidates. Maximal degree in co-relation 94378. Up to 10861 conditions per place. [2024-06-27 17:56:12,254 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 161 selfloop transitions, 63 changer transitions 0/246 dead transitions. [2024-06-27 17:56:12,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 246 transitions, 3008 flow [2024-06-27 17:56:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-06-27 17:56:12,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-27 17:56:12,255 INFO L175 Difference]: Start difference. First operand has 156 places, 192 transitions, 2215 flow. Second operand 6 states and 228 transitions. [2024-06-27 17:56:12,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 246 transitions, 3008 flow [2024-06-27 17:56:12,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 246 transitions, 2934 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:12,961 INFO L231 Difference]: Finished difference. Result has 158 places, 193 transitions, 2305 flow [2024-06-27 17:56:12,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2305, PETRI_PLACES=158, PETRI_TRANSITIONS=193} [2024-06-27 17:56:12,962 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 98 predicate places. [2024-06-27 17:56:12,962 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 193 transitions, 2305 flow [2024-06-27 17:56:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:12,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:12,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:56:12,962 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:12,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1325032766, now seen corresponding path program 4 times [2024-06-27 17:56:12,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:12,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126935206] [2024-06-27 17:56:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:12,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:13,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126935206] [2024-06-27 17:56:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126935206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:13,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652564247] [2024-06-27 17:56:13,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:13,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:13,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 193 transitions, 2305 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:13,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:13,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:13,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:14,661 INFO L124 PetriNetUnfolderBase]: 10353/15627 cut-off events. [2024-06-27 17:56:14,661 INFO L125 PetriNetUnfolderBase]: For 257129/258569 co-relation queries the response was YES. [2024-06-27 17:56:14,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91702 conditions, 15627 events. 10353/15627 cut-off events. For 257129/258569 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 107035 event pairs, 3637 based on Foata normal form. 258/15434 useless extension candidates. Maximal degree in co-relation 91628. Up to 12875 conditions per place. [2024-06-27 17:56:14,814 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 158 selfloop transitions, 55 changer transitions 0/235 dead transitions. [2024-06-27 17:56:14,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 235 transitions, 2899 flow [2024-06-27 17:56:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-06-27 17:56:14,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-06-27 17:56:14,816 INFO L175 Difference]: Start difference. First operand has 158 places, 193 transitions, 2305 flow. Second operand 6 states and 219 transitions. [2024-06-27 17:56:14,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 235 transitions, 2899 flow [2024-06-27 17:56:15,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 235 transitions, 2743 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:15,517 INFO L231 Difference]: Finished difference. Result has 159 places, 193 transitions, 2271 flow [2024-06-27 17:56:15,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2271, PETRI_PLACES=159, PETRI_TRANSITIONS=193} [2024-06-27 17:56:15,518 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-06-27 17:56:15,518 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 193 transitions, 2271 flow [2024-06-27 17:56:15,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:15,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:15,518 INFO 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 17:56:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:56:15,519 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:15,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1925711610, now seen corresponding path program 5 times [2024-06-27 17:56:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:15,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352718136] [2024-06-27 17:56:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:15,644 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 17:56:15,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:15,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352718136] [2024-06-27 17:56:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352718136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:15,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031491791] [2024-06-27 17:56:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:15,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:15,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 193 transitions, 2271 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:15,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:15,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:15,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:17,440 INFO L124 PetriNetUnfolderBase]: 11440/17782 cut-off events. [2024-06-27 17:56:17,440 INFO L125 PetriNetUnfolderBase]: For 288248/289676 co-relation queries the response was YES. [2024-06-27 17:56:17,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101687 conditions, 17782 events. 11440/17782 cut-off events. For 288248/289676 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 128503 event pairs, 4413 based on Foata normal form. 272/17554 useless extension candidates. Maximal degree in co-relation 101613. Up to 13685 conditions per place. [2024-06-27 17:56:17,642 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 165 selfloop transitions, 68 changer transitions 0/255 dead transitions. [2024-06-27 17:56:17,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 255 transitions, 3111 flow [2024-06-27 17:56:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-06-27 17:56:17,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:56:17,643 INFO L175 Difference]: Start difference. First operand has 159 places, 193 transitions, 2271 flow. Second operand 7 states and 259 transitions. [2024-06-27 17:56:17,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 255 transitions, 3111 flow [2024-06-27 17:56:18,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 255 transitions, 2968 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 17:56:18,410 INFO L231 Difference]: Finished difference. Result has 160 places, 195 transitions, 2332 flow [2024-06-27 17:56:18,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=160, PETRI_TRANSITIONS=195} [2024-06-27 17:56:18,411 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 100 predicate places. [2024-06-27 17:56:18,411 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 195 transitions, 2332 flow [2024-06-27 17:56:18,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:18,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:18,411 INFO 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 17:56:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:56:18,412 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:18,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1918093050, now seen corresponding path program 6 times [2024-06-27 17:56:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:18,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483110778] [2024-06-27 17:56:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:18,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:18,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483110778] [2024-06-27 17:56:18,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483110778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:18,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:18,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840034563] [2024-06-27 17:56:18,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:18,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:18,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:18,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 195 transitions, 2332 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:18,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:18,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:18,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:20,304 INFO L124 PetriNetUnfolderBase]: 11993/18273 cut-off events. [2024-06-27 17:56:20,305 INFO L125 PetriNetUnfolderBase]: For 305035/306456 co-relation queries the response was YES. [2024-06-27 17:56:20,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106388 conditions, 18273 events. 11993/18273 cut-off events. For 305035/306456 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 129305 event pairs, 4007 based on Foata normal form. 221/18049 useless extension candidates. Maximal degree in co-relation 106314. Up to 15411 conditions per place. [2024-06-27 17:56:20,498 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 157 selfloop transitions, 66 changer transitions 0/245 dead transitions. [2024-06-27 17:56:20,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 245 transitions, 2974 flow [2024-06-27 17:56:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:20,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 250 transitions. [2024-06-27 17:56:20,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6613756613756614 [2024-06-27 17:56:20,500 INFO L175 Difference]: Start difference. First operand has 160 places, 195 transitions, 2332 flow. Second operand 7 states and 250 transitions. [2024-06-27 17:56:20,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 245 transitions, 2974 flow [2024-06-27 17:56:21,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 245 transitions, 2872 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:21,268 INFO L231 Difference]: Finished difference. Result has 164 places, 196 transitions, 2402 flow [2024-06-27 17:56:21,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2402, PETRI_PLACES=164, PETRI_TRANSITIONS=196} [2024-06-27 17:56:21,269 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-06-27 17:56:21,269 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 196 transitions, 2402 flow [2024-06-27 17:56:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:21,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:21,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:21,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:56:21,269 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:21,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1659805080, now seen corresponding path program 7 times [2024-06-27 17:56:21,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:21,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794190717] [2024-06-27 17:56:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:21,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:21,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:21,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794190717] [2024-06-27 17:56:21,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794190717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:21,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:21,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:21,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736176390] [2024-06-27 17:56:21,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:21,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:21,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:21,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:21,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:21,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 196 transitions, 2402 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:21,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:21,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:21,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:24,221 INFO L124 PetriNetUnfolderBase]: 12391/18569 cut-off events. [2024-06-27 17:56:24,222 INFO L125 PetriNetUnfolderBase]: For 305941/307474 co-relation queries the response was YES. [2024-06-27 17:56:24,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109207 conditions, 18569 events. 12391/18569 cut-off events. For 305941/307474 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 130189 event pairs, 3802 based on Foata normal form. 216/18322 useless extension candidates. Maximal degree in co-relation 109131. Up to 16052 conditions per place. [2024-06-27 17:56:24,375 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 155 selfloop transitions, 67 changer transitions 0/244 dead transitions. [2024-06-27 17:56:24,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 244 transitions, 3042 flow [2024-06-27 17:56:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 248 transitions. [2024-06-27 17:56:24,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.656084656084656 [2024-06-27 17:56:24,376 INFO L175 Difference]: Start difference. First operand has 164 places, 196 transitions, 2402 flow. Second operand 7 states and 248 transitions. [2024-06-27 17:56:24,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 244 transitions, 3042 flow [2024-06-27 17:56:25,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 244 transitions, 2906 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:25,025 INFO L231 Difference]: Finished difference. Result has 166 places, 197 transitions, 2436 flow [2024-06-27 17:56:25,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2436, PETRI_PLACES=166, PETRI_TRANSITIONS=197} [2024-06-27 17:56:25,025 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 106 predicate places. [2024-06-27 17:56:25,025 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 197 transitions, 2436 flow [2024-06-27 17:56:25,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:25,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:25,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:56:25,026 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:25,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1770343438, now seen corresponding path program 8 times [2024-06-27 17:56:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:25,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870758028] [2024-06-27 17:56:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:25,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:25,222 INFO 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 17:56:25,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:25,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870758028] [2024-06-27 17:56:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870758028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:25,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:25,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:25,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769692087] [2024-06-27 17:56:25,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:25,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:25,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:25,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:25,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 197 transitions, 2436 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:25,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:25,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:25,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:27,466 INFO L124 PetriNetUnfolderBase]: 12356/18657 cut-off events. [2024-06-27 17:56:27,466 INFO L125 PetriNetUnfolderBase]: For 306446/308002 co-relation queries the response was YES. [2024-06-27 17:56:27,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107762 conditions, 18657 events. 12356/18657 cut-off events. For 306446/308002 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 131545 event pairs, 4020 based on Foata normal form. 145/18308 useless extension candidates. Maximal degree in co-relation 107685. Up to 15781 conditions per place. [2024-06-27 17:56:27,623 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 166 selfloop transitions, 55 changer transitions 0/243 dead transitions. [2024-06-27 17:56:27,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 243 transitions, 3038 flow [2024-06-27 17:56:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-06-27 17:56:27,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6882716049382716 [2024-06-27 17:56:27,624 INFO L175 Difference]: Start difference. First operand has 166 places, 197 transitions, 2436 flow. Second operand 6 states and 223 transitions. [2024-06-27 17:56:27,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 243 transitions, 3038 flow [2024-06-27 17:56:28,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 243 transitions, 2892 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:28,269 INFO L231 Difference]: Finished difference. Result has 167 places, 197 transitions, 2412 flow [2024-06-27 17:56:28,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2412, PETRI_PLACES=167, PETRI_TRANSITIONS=197} [2024-06-27 17:56:28,269 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 107 predicate places. [2024-06-27 17:56:28,270 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 197 transitions, 2412 flow [2024-06-27 17:56:28,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:28,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:28,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:28,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:56:28,270 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:28,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:28,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1748455160, now seen corresponding path program 1 times [2024-06-27 17:56:28,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:28,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900380408] [2024-06-27 17:56:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:28,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:28,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900380408] [2024-06-27 17:56:28,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900380408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:28,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:28,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:28,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838896857] [2024-06-27 17:56:28,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:28,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:28,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 197 transitions, 2412 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:28,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:28,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:28,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:30,763 INFO L124 PetriNetUnfolderBase]: 12990/19494 cut-off events. [2024-06-27 17:56:30,763 INFO L125 PetriNetUnfolderBase]: For 326205/327869 co-relation queries the response was YES. [2024-06-27 17:56:30,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113715 conditions, 19494 events. 12990/19494 cut-off events. For 326205/327869 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 137426 event pairs, 3364 based on Foata normal form. 228/19277 useless extension candidates. Maximal degree in co-relation 113637. Up to 10330 conditions per place. [2024-06-27 17:56:31,074 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 161 selfloop transitions, 82 changer transitions 0/265 dead transitions. [2024-06-27 17:56:31,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 265 transitions, 3338 flow [2024-06-27 17:56:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-06-27 17:56:31,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6957671957671958 [2024-06-27 17:56:31,076 INFO L175 Difference]: Start difference. First operand has 167 places, 197 transitions, 2412 flow. Second operand 7 states and 263 transitions. [2024-06-27 17:56:31,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 265 transitions, 3338 flow [2024-06-27 17:56:31,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 265 transitions, 3216 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:31,780 INFO L231 Difference]: Finished difference. Result has 169 places, 199 transitions, 2522 flow [2024-06-27 17:56:31,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2522, PETRI_PLACES=169, PETRI_TRANSITIONS=199} [2024-06-27 17:56:31,781 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 109 predicate places. [2024-06-27 17:56:31,781 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 199 transitions, 2522 flow [2024-06-27 17:56:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:31,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:31,781 INFO 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 17:56:31,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:56:31,781 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:31,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:31,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1748186390, now seen corresponding path program 2 times [2024-06-27 17:56:31,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:31,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544870165] [2024-06-27 17:56:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:31,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:31,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:31,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544870165] [2024-06-27 17:56:31,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544870165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:31,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:31,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:31,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344116897] [2024-06-27 17:56:31,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:31,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:31,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:31,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:31,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 199 transitions, 2522 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:31,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:31,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:31,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:34,377 INFO L124 PetriNetUnfolderBase]: 13286/19964 cut-off events. [2024-06-27 17:56:34,377 INFO L125 PetriNetUnfolderBase]: For 351883/353545 co-relation queries the response was YES. [2024-06-27 17:56:34,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118142 conditions, 19964 events. 13286/19964 cut-off events. For 351883/353545 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 141657 event pairs, 3309 based on Foata normal form. 224/19715 useless extension candidates. Maximal degree in co-relation 118063. Up to 10400 conditions per place. [2024-06-27 17:56:34,757 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 159 selfloop transitions, 83 changer transitions 0/264 dead transitions. [2024-06-27 17:56:34,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 264 transitions, 3426 flow [2024-06-27 17:56:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-06-27 17:56:34,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-27 17:56:34,758 INFO L175 Difference]: Start difference. First operand has 169 places, 199 transitions, 2522 flow. Second operand 7 states and 261 transitions. [2024-06-27 17:56:34,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 264 transitions, 3426 flow [2024-06-27 17:56:35,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 264 transitions, 3234 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:35,462 INFO L231 Difference]: Finished difference. Result has 172 places, 200 transitions, 2534 flow [2024-06-27 17:56:35,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2534, PETRI_PLACES=172, PETRI_TRANSITIONS=200} [2024-06-27 17:56:35,462 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 112 predicate places. [2024-06-27 17:56:35,462 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 200 transitions, 2534 flow [2024-06-27 17:56:35,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:35,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:35,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:35,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:56:35,463 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:35,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash -870229516, now seen corresponding path program 3 times [2024-06-27 17:56:35,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:35,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037847281] [2024-06-27 17:56:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:35,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:35,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:35,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037847281] [2024-06-27 17:56:35,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037847281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:35,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:35,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:35,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165705510] [2024-06-27 17:56:35,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:35,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:35,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:35,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 200 transitions, 2534 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:35,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:35,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:35,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:38,167 INFO L124 PetriNetUnfolderBase]: 13686/21306 cut-off events. [2024-06-27 17:56:38,167 INFO L125 PetriNetUnfolderBase]: For 371669/373182 co-relation queries the response was YES. [2024-06-27 17:56:38,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122501 conditions, 21306 events. 13686/21306 cut-off events. For 371669/373182 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 159309 event pairs, 5470 based on Foata normal form. 230/20891 useless extension candidates. Maximal degree in co-relation 122421. Up to 15755 conditions per place. [2024-06-27 17:56:38,387 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 162 selfloop transitions, 71 changer transitions 0/255 dead transitions. [2024-06-27 17:56:38,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 255 transitions, 3260 flow [2024-06-27 17:56:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 253 transitions. [2024-06-27 17:56:38,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693121693121693 [2024-06-27 17:56:38,388 INFO L175 Difference]: Start difference. First operand has 172 places, 200 transitions, 2534 flow. Second operand 7 states and 253 transitions. [2024-06-27 17:56:38,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 255 transitions, 3260 flow [2024-06-27 17:56:39,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 255 transitions, 3128 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:56:39,451 INFO L231 Difference]: Finished difference. Result has 175 places, 201 transitions, 2578 flow [2024-06-27 17:56:39,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2578, PETRI_PLACES=175, PETRI_TRANSITIONS=201} [2024-06-27 17:56:39,451 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 115 predicate places. [2024-06-27 17:56:39,451 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 201 transitions, 2578 flow [2024-06-27 17:56:39,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:39,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:39,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:39,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:56:39,452 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:39,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:39,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1770158988, now seen corresponding path program 4 times [2024-06-27 17:56:39,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:39,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176478921] [2024-06-27 17:56:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:39,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:39,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:39,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176478921] [2024-06-27 17:56:39,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176478921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:39,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:39,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:56:39,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052032863] [2024-06-27 17:56:39,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:39,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:56:39,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:56:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:56:39,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:56:39,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 201 transitions, 2578 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:39,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:39,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:56:39,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:42,406 INFO L124 PetriNetUnfolderBase]: 13791/21291 cut-off events. [2024-06-27 17:56:42,406 INFO L125 PetriNetUnfolderBase]: For 368577/369998 co-relation queries the response was YES. [2024-06-27 17:56:42,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120950 conditions, 21291 events. 13791/21291 cut-off events. For 368577/369998 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 156577 event pairs, 4675 based on Foata normal form. 135/20771 useless extension candidates. Maximal degree in co-relation 120869. Up to 15729 conditions per place. [2024-06-27 17:56:42,592 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 168 selfloop transitions, 64 changer transitions 0/254 dead transitions. [2024-06-27 17:56:42,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 254 transitions, 3266 flow [2024-06-27 17:56:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:56:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:56:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-06-27 17:56:42,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-27 17:56:42,593 INFO L175 Difference]: Start difference. First operand has 175 places, 201 transitions, 2578 flow. Second operand 6 states and 228 transitions. [2024-06-27 17:56:42,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 254 transitions, 3266 flow [2024-06-27 17:56:43,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 254 transitions, 3112 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:56:43,568 INFO L231 Difference]: Finished difference. Result has 176 places, 201 transitions, 2561 flow [2024-06-27 17:56:43,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2561, PETRI_PLACES=176, PETRI_TRANSITIONS=201} [2024-06-27 17:56:43,569 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 116 predicate places. [2024-06-27 17:56:43,569 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 201 transitions, 2561 flow [2024-06-27 17:56:43,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 17:56:43,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:43,569 INFO 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 17:56:43,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:56:43,569 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:43,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:43,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1769884059, now seen corresponding path program 1 times [2024-06-27 17:56:43,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:43,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442808432] [2024-06-27 17:56:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:43,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442808432] [2024-06-27 17:56:43,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442808432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:43,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:43,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92164931] [2024-06-27 17:56:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:43,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:56:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 201 transitions, 2561 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:56:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:56:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:46,377 INFO L124 PetriNetUnfolderBase]: 15183/22365 cut-off events. [2024-06-27 17:56:46,377 INFO L125 PetriNetUnfolderBase]: For 329157/329166 co-relation queries the response was YES. [2024-06-27 17:56:46,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126366 conditions, 22365 events. 15183/22365 cut-off events. For 329157/329166 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 155934 event pairs, 5234 based on Foata normal form. 7/22363 useless extension candidates. Maximal degree in co-relation 126284. Up to 20951 conditions per place. [2024-06-27 17:56:46,600 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 190 selfloop transitions, 39 changer transitions 0/244 dead transitions. [2024-06-27 17:56:46,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 244 transitions, 3317 flow [2024-06-27 17:56:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:56:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:56:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-27 17:56:46,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-27 17:56:46,601 INFO L175 Difference]: Start difference. First operand has 176 places, 201 transitions, 2561 flow. Second operand 7 states and 227 transitions. [2024-06-27 17:56:46,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 244 transitions, 3317 flow [2024-06-27 17:56:47,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 244 transitions, 3141 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:56:47,554 INFO L231 Difference]: Finished difference. Result has 178 places, 213 transitions, 2659 flow [2024-06-27 17:56:47,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2385, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=178, PETRI_TRANSITIONS=213} [2024-06-27 17:56:47,554 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 118 predicate places. [2024-06-27 17:56:47,555 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 213 transitions, 2659 flow [2024-06-27 17:56:47,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:56:47,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:47,555 INFO 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 17:56:47,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:56:47,555 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:47,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1780359579, now seen corresponding path program 2 times [2024-06-27 17:56:47,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:47,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468144014] [2024-06-27 17:56:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:47,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468144014] [2024-06-27 17:56:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468144014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:47,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:47,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264425409] [2024-06-27 17:56:47,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:47,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:47,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:56:47,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 213 transitions, 2659 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:56:47,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:47,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:56:47,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:50,535 INFO L124 PetriNetUnfolderBase]: 15179/22460 cut-off events. [2024-06-27 17:56:50,535 INFO L125 PetriNetUnfolderBase]: For 335487/335511 co-relation queries the response was YES. [2024-06-27 17:56:50,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127534 conditions, 22460 events. 15179/22460 cut-off events. For 335487/335511 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 157442 event pairs, 7014 based on Foata normal form. 17/22400 useless extension candidates. Maximal degree in co-relation 127450. Up to 20947 conditions per place. [2024-06-27 17:56:50,770 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 179 selfloop transitions, 37 changer transitions 0/231 dead transitions. [2024-06-27 17:56:50,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 231 transitions, 3133 flow [2024-06-27 17:56:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:56:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:56:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-06-27 17:56:50,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-27 17:56:50,771 INFO L175 Difference]: Start difference. First operand has 178 places, 213 transitions, 2659 flow. Second operand 5 states and 166 transitions. [2024-06-27 17:56:50,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 231 transitions, 3133 flow [2024-06-27 17:56:51,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 231 transitions, 2999 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-27 17:56:51,641 INFO L231 Difference]: Finished difference. Result has 180 places, 213 transitions, 2611 flow [2024-06-27 17:56:51,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2611, PETRI_PLACES=180, PETRI_TRANSITIONS=213} [2024-06-27 17:56:51,641 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 120 predicate places. [2024-06-27 17:56:51,641 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 213 transitions, 2611 flow [2024-06-27 17:56:51,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 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 17:56:51,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:51,642 INFO 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 17:56:51,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:56:51,642 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:51,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:51,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1780372475, now seen corresponding path program 1 times [2024-06-27 17:56:51,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:51,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168965649] [2024-06-27 17:56:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:51,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:51,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:51,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168965649] [2024-06-27 17:56:51,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168965649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:51,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:51,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:56:51,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409989396] [2024-06-27 17:56:51,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:51,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:56:51,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:56:51,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:56:51,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:56:51,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 213 transitions, 2611 flow. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 17:56:51,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:51,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:56:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand