./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/rfi000_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i ./goblint.2024-05-21_14-57-05.files/protection/rfi000_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:13:18,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:13:18,067 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:13:18,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:13:18,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:13:18,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:13:18,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:13:18,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:13:18,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:13:18,102 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:13:18,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:13:18,102 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:13:18,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:13:18,104 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:13:18,104 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:13:18,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:13:18,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:13:18,105 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:13:18,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:13:18,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:13:18,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:13:18,106 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:13:18,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:13:18,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:13:18,107 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:13:18,107 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:13:18,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:13:18,107 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:13:18,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:13:18,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:13:18,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:13:18,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:13:18,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:18,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:13:18,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:13:18,110 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:13:18,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:13:18,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:13:18,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:13:18,111 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:13:18,111 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:13:18,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:13:18,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:13:18,111 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:13:18,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:13:18,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:13:18,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:13:18,306 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:13:18,307 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:13:18,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi000_tso.yml/witness.yml [2024-06-20 15:13:18,468 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:13:18,469 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:13:18,470 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2024-06-20 15:13:19,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:13:19,702 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:13:19,703 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2024-06-20 15:13:19,748 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2987de9f0/ae651c8772b64eb4b2433f78dce0f0bf/FLAG2c0ee340b [2024-06-20 15:13:19,759 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2987de9f0/ae651c8772b64eb4b2433f78dce0f0bf [2024-06-20 15:13:19,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:13:19,766 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:13:19,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:19,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:13:19,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:13:19,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:18" (1/2) ... [2024-06-20 15:13:19,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0a3d09 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:19, skipping insertion in model container [2024-06-20 15:13:19,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:18" (1/2) ... [2024-06-20 15:13:19,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@798f0628 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:19, skipping insertion in model container [2024-06-20 15:13:19,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:19" (2/2) ... [2024-06-20 15:13:19,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0a3d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:19, skipping insertion in model container [2024-06-20 15:13:19,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:19" (2/2) ... [2024-06-20 15:13:19,775 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:13:19,841 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:13:19,842 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] ((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 2) && __unbuffered_p1_EBX <= 127) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2)))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-20 15:13:19,842 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] ((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 2) && __unbuffered_p1_EBX <= 127) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2)))) && (! multithreaded || y$read_delayed_var == 0) [2024-06-20 15:13:19,842 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:13:19,842 INFO L106 edCorrectnessWitness]: ghost_update [L827-L827] multithreaded = 1; [2024-06-20 15:13:19,878 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:13:20,221 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:20,232 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:13:20,325 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:20,364 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:13:20,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20 WrapperNode [2024-06-20 15:13:20,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:20,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:20,366 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:13:20,366 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:13:20,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,402 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,445 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 176 [2024-06-20 15:13:20,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:20,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:13:20,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:13:20,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:13:20,455 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,463 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,481 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:13:20,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,489 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,490 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,492 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,495 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:13:20,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:13:20,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:13:20,496 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:13:20,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (1/1) ... [2024-06-20 15:13:20,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:20,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:13:20,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:13:20,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:13:20,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:13:20,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:13:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:13:20,629 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:13:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:13:20,629 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:13:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:13:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:13:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:13:20,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:13:20,632 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:13:20,733 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:13:20,735 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:13:21,028 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:13:21,028 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:13:21,203 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:13:21,203 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:13:21,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:21 BoogieIcfgContainer [2024-06-20 15:13:21,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:13:21,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:13:21,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:13:21,209 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:13:21,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:18" (1/4) ... [2024-06-20 15:13:21,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735260 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:21, skipping insertion in model container [2024-06-20 15:13:21,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:13:19" (2/4) ... [2024-06-20 15:13:21,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:21, skipping insertion in model container [2024-06-20 15:13:21,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:20" (3/4) ... [2024-06-20 15:13:21,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:21, skipping insertion in model container [2024-06-20 15:13:21,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:21" (4/4) ... [2024-06-20 15:13:21,212 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_tso.i [2024-06-20 15:13:21,225 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:13:21,225 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 15:13:21,226 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:13:21,253 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:13:21,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 15:13:21,346 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-20 15:13:21,346 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:21,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:13:21,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 15:13:21,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-20 15:13:21,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:13:21,400 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;@75122c5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:13:21,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 15:13:21,404 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:13:21,404 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 15:13:21,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:21,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:21,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:13:21,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:21,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:21,415 INFO L85 PathProgramCache]: Analyzing trace with hash 402762543, now seen corresponding path program 1 times [2024-06-20 15:13:21,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:21,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781089989] [2024-06-20 15:13:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:21,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781089989] [2024-06-20 15:13:22,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781089989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:22,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:22,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:13:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259666208] [2024-06-20 15:13:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:22,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:13:22,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:13:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:13:22,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 15:13:22,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:22,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:22,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 15:13:22,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:22,356 INFO L124 PetriNetUnfolderBase]: 216/386 cut-off events. [2024-06-20 15:13:22,357 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-20 15:13:22,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 386 events. 216/386 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1374 event pairs, 133 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 776. Up to 378 conditions per place. [2024-06-20 15:13:22,361 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-20 15:13:22,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 119 flow [2024-06-20 15:13:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:13:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:13:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-20 15:13:22,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-06-20 15:13:22,372 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 49 transitions. [2024-06-20 15:13:22,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 119 flow [2024-06-20 15:13:22,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:22,375 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-20 15:13:22,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-20 15:13:22,379 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-20 15:13:22,379 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-20 15:13:22,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:22,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:22,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:22,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:13:22,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash 508095192, now seen corresponding path program 1 times [2024-06-20 15:13:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:22,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140427480] [2024-06-20 15:13:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:22,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:22,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140427480] [2024-06-20 15:13:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140427480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:22,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:13:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557444109] [2024-06-20 15:13:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:22,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:13:22,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:22,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:13:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:13:22,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 15:13:22,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:22,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:22,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 15:13:22,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:22,866 INFO L124 PetriNetUnfolderBase]: 213/381 cut-off events. [2024-06-20 15:13:22,866 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-06-20 15:13:22,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 381 events. 213/381 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1343 event pairs, 109 based on Foata normal form. 2/382 useless extension candidates. Maximal degree in co-relation 865. Up to 364 conditions per place. [2024-06-20 15:13:22,872 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-20 15:13:22,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 161 flow [2024-06-20 15:13:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-06-20 15:13:22,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 15:13:22,875 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 62 transitions. [2024-06-20 15:13:22,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 161 flow [2024-06-20 15:13:22,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:22,879 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-20 15:13:22,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-20 15:13:22,880 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-20 15:13:22,881 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-20 15:13:22,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:22,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:22,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:22,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:13:22,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:22,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:22,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1428917206, now seen corresponding path program 1 times [2024-06-20 15:13:22,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:22,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96723050] [2024-06-20 15:13:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:22,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:23,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:23,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96723050] [2024-06-20 15:13:23,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96723050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:23,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:23,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:23,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741886998] [2024-06-20 15:13:23,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:23,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:23,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:23,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:23,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 15:13:23,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:23,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:23,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 15:13:23,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:23,472 INFO L124 PetriNetUnfolderBase]: 215/385 cut-off events. [2024-06-20 15:13:23,473 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2024-06-20 15:13:23,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 385 events. 215/385 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1359 event pairs, 53 based on Foata normal form. 6/390 useless extension candidates. Maximal degree in co-relation 958. Up to 320 conditions per place. [2024-06-20 15:13:23,476 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2024-06-20 15:13:23,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 51 transitions, 261 flow [2024-06-20 15:13:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-20 15:13:23,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535483870967742 [2024-06-20 15:13:23,478 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 83 transitions. [2024-06-20 15:13:23,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 51 transitions, 261 flow [2024-06-20 15:13:23,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 252 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:23,481 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 162 flow [2024-06-20 15:13:23,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-06-20 15:13:23,482 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-20 15:13:23,482 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 162 flow [2024-06-20 15:13:23,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:23,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:23,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:23,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:13:23,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:23,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash 342448371, now seen corresponding path program 1 times [2024-06-20 15:13:23,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:23,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258621983] [2024-06-20 15:13:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:23,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:24,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:24,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258621983] [2024-06-20 15:13:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258621983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:24,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:24,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:24,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440163876] [2024-06-20 15:13:24,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:24,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:24,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:24,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 15:13:24,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:24,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:24,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 15:13:24,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:24,363 INFO L124 PetriNetUnfolderBase]: 216/388 cut-off events. [2024-06-20 15:13:24,363 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2024-06-20 15:13:24,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 388 events. 216/388 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1382 event pairs, 28 based on Foata normal form. 6/393 useless extension candidates. Maximal degree in co-relation 1151. Up to 297 conditions per place. [2024-06-20 15:13:24,366 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2024-06-20 15:13:24,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 312 flow [2024-06-20 15:13:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-20 15:13:24,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2024-06-20 15:13:24,367 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 162 flow. Second operand 6 states and 92 transitions. [2024-06-20 15:13:24,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 312 flow [2024-06-20 15:13:24,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 308 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:24,370 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 187 flow [2024-06-20 15:13:24,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-06-20 15:13:24,370 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-06-20 15:13:24,371 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 187 flow [2024-06-20 15:13:24,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:24,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:24,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:24,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:13:24,371 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:24,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash -157977323, now seen corresponding path program 1 times [2024-06-20 15:13:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118956265] [2024-06-20 15:13:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:24,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:24,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118956265] [2024-06-20 15:13:24,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118956265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:24,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:24,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:24,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605811392] [2024-06-20 15:13:24,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:24,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:24,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:24,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:24,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:24,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:24,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:24,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:24,940 INFO L124 PetriNetUnfolderBase]: 214/385 cut-off events. [2024-06-20 15:13:24,941 INFO L125 PetriNetUnfolderBase]: For 686/686 co-relation queries the response was YES. [2024-06-20 15:13:24,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 385 events. 214/385 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1369 event pairs, 77 based on Foata normal form. 1/385 useless extension candidates. Maximal degree in co-relation 1243. Up to 374 conditions per place. [2024-06-20 15:13:24,943 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 32 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2024-06-20 15:13:24,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 275 flow [2024-06-20 15:13:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-06-20 15:13:24,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:13:24,944 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 187 flow. Second operand 5 states and 55 transitions. [2024-06-20 15:13:24,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 275 flow [2024-06-20 15:13:24,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 244 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:24,947 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 173 flow [2024-06-20 15:13:24,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2024-06-20 15:13:24,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-20 15:13:24,948 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 173 flow [2024-06-20 15:13:24,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:24,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:24,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:13:24,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:24,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -613427755, now seen corresponding path program 1 times [2024-06-20 15:13:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:24,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816979267] [2024-06-20 15:13:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:25,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816979267] [2024-06-20 15:13:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816979267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:25,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:25,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937444434] [2024-06-20 15:13:25,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:25,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:25,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:25,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:25,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 173 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:25,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:25,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:25,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:25,603 INFO L124 PetriNetUnfolderBase]: 212/382 cut-off events. [2024-06-20 15:13:25,603 INFO L125 PetriNetUnfolderBase]: For 810/810 co-relation queries the response was YES. [2024-06-20 15:13:25,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 382 events. 212/382 cut-off events. For 810/810 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1363 event pairs, 76 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 1219. Up to 368 conditions per place. [2024-06-20 15:13:25,606 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 33 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2024-06-20 15:13:25,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 277 flow [2024-06-20 15:13:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-06-20 15:13:25,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 15:13:25,608 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 173 flow. Second operand 6 states and 63 transitions. [2024-06-20 15:13:25,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 277 flow [2024-06-20 15:13:25,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 262 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:25,610 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 191 flow [2024-06-20 15:13:25,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-06-20 15:13:25,611 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-20 15:13:25,611 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 191 flow [2024-06-20 15:13:25,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:25,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:25,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:25,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:13:25,612 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:25,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1498775064, now seen corresponding path program 1 times [2024-06-20 15:13:25,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:25,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013424983] [2024-06-20 15:13:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:26,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:26,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013424983] [2024-06-20 15:13:26,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013424983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:26,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:26,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411284122] [2024-06-20 15:13:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:26,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:26,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:26,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:26,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:26,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:26,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:26,339 INFO L124 PetriNetUnfolderBase]: 211/381 cut-off events. [2024-06-20 15:13:26,339 INFO L125 PetriNetUnfolderBase]: For 1022/1022 co-relation queries the response was YES. [2024-06-20 15:13:26,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 381 events. 211/381 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1340 event pairs, 53 based on Foata normal form. 3/383 useless extension candidates. Maximal degree in co-relation 1287. Up to 318 conditions per place. [2024-06-20 15:13:26,341 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 13 changer transitions 0/51 dead transitions. [2024-06-20 15:13:26,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 342 flow [2024-06-20 15:13:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-06-20 15:13:26,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-20 15:13:26,342 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 191 flow. Second operand 6 states and 73 transitions. [2024-06-20 15:13:26,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 342 flow [2024-06-20 15:13:26,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 325 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:26,345 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 222 flow [2024-06-20 15:13:26,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2024-06-20 15:13:26,345 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-06-20 15:13:26,346 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 222 flow [2024-06-20 15:13:26,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:26,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:26,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:26,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:13:26,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:26,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1268182826, now seen corresponding path program 2 times [2024-06-20 15:13:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:26,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147099666] [2024-06-20 15:13:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:26,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:26,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147099666] [2024-06-20 15:13:26,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147099666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:26,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:26,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:26,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171899094] [2024-06-20 15:13:26,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:26,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:26,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:26,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:26,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:26,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:26,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:27,015 INFO L124 PetriNetUnfolderBase]: 206/373 cut-off events. [2024-06-20 15:13:27,016 INFO L125 PetriNetUnfolderBase]: For 1294/1294 co-relation queries the response was YES. [2024-06-20 15:13:27,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 373 events. 206/373 cut-off events. For 1294/1294 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1308 event pairs, 66 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1319. Up to 311 conditions per place. [2024-06-20 15:13:27,018 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 31 selfloop transitions, 14 changer transitions 0/47 dead transitions. [2024-06-20 15:13:27,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 330 flow [2024-06-20 15:13:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-20 15:13:27,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-20 15:13:27,019 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 222 flow. Second operand 6 states and 70 transitions. [2024-06-20 15:13:27,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 330 flow [2024-06-20 15:13:27,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 315 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:27,021 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 240 flow [2024-06-20 15:13:27,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2024-06-20 15:13:27,022 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-20 15:13:27,022 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 240 flow [2024-06-20 15:13:27,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:27,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:27,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:27,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:13:27,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:27,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1503922118, now seen corresponding path program 1 times [2024-06-20 15:13:27,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:27,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391903828] [2024-06-20 15:13:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:27,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391903828] [2024-06-20 15:13:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391903828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:27,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:27,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:27,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929809791] [2024-06-20 15:13:27,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:27,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:27,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:27,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:27,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:27,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:27,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:27,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:27,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:27,832 INFO L124 PetriNetUnfolderBase]: 204/368 cut-off events. [2024-06-20 15:13:27,833 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2024-06-20 15:13:27,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 368 events. 204/368 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1297 event pairs, 71 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 1353. Up to 351 conditions per place. [2024-06-20 15:13:27,835 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-06-20 15:13:27,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 358 flow [2024-06-20 15:13:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-20 15:13:27,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271889400921659 [2024-06-20 15:13:27,836 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 240 flow. Second operand 7 states and 71 transitions. [2024-06-20 15:13:27,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 358 flow [2024-06-20 15:13:27,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 312 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:27,839 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 233 flow [2024-06-20 15:13:27,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-06-20 15:13:27,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-20 15:13:27,840 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 233 flow [2024-06-20 15:13:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:27,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:27,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:13:27,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:27,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash 782614784, now seen corresponding path program 1 times [2024-06-20 15:13:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877830196] [2024-06-20 15:13:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877830196] [2024-06-20 15:13:28,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877830196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:28,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841899204] [2024-06-20 15:13:28,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:28,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:28,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 233 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:28,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:28,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:28,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:28,524 INFO L124 PetriNetUnfolderBase]: 213/384 cut-off events. [2024-06-20 15:13:28,525 INFO L125 PetriNetUnfolderBase]: For 1865/1865 co-relation queries the response was YES. [2024-06-20 15:13:28,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 384 events. 213/384 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1378 event pairs, 56 based on Foata normal form. 3/385 useless extension candidates. Maximal degree in co-relation 1423. Up to 314 conditions per place. [2024-06-20 15:13:28,527 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 38 selfloop transitions, 20 changer transitions 0/60 dead transitions. [2024-06-20 15:13:28,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 411 flow [2024-06-20 15:13:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-20 15:13:28,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37327188940092165 [2024-06-20 15:13:28,528 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 233 flow. Second operand 7 states and 81 transitions. [2024-06-20 15:13:28,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 411 flow [2024-06-20 15:13:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 388 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:28,531 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 317 flow [2024-06-20 15:13:28,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-20 15:13:28,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-06-20 15:13:28,532 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 317 flow [2024-06-20 15:13:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:28,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:28,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:28,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:13:28,533 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:28,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash 982983284, now seen corresponding path program 2 times [2024-06-20 15:13:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:28,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672214589] [2024-06-20 15:13:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:28,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672214589] [2024-06-20 15:13:28,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672214589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863506043] [2024-06-20 15:13:28,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:28,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:29,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:29,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 317 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:29,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:29,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:29,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:29,191 INFO L124 PetriNetUnfolderBase]: 216/390 cut-off events. [2024-06-20 15:13:29,191 INFO L125 PetriNetUnfolderBase]: For 2321/2324 co-relation queries the response was YES. [2024-06-20 15:13:29,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 390 events. 216/390 cut-off events. For 2321/2324 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1373 event pairs, 63 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1638. Up to 325 conditions per place. [2024-06-20 15:13:29,193 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 37 selfloop transitions, 19 changer transitions 0/58 dead transitions. [2024-06-20 15:13:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 459 flow [2024-06-20 15:13:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-20 15:13:29,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-20 15:13:29,194 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 317 flow. Second operand 7 states and 78 transitions. [2024-06-20 15:13:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 459 flow [2024-06-20 15:13:29,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 438 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:29,198 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 357 flow [2024-06-20 15:13:29,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-06-20 15:13:29,199 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-20 15:13:29,199 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 357 flow [2024-06-20 15:13:29,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:29,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:29,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:29,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:13:29,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:29,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1093512524, now seen corresponding path program 3 times [2024-06-20 15:13:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88216939] [2024-06-20 15:13:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:29,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:29,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88216939] [2024-06-20 15:13:29,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88216939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:29,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:29,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:29,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377226076] [2024-06-20 15:13:29,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:29,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:29,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:29,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:29,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:29,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:29,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 357 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:29,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:29,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:29,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:29,900 INFO L124 PetriNetUnfolderBase]: 219/395 cut-off events. [2024-06-20 15:13:29,901 INFO L125 PetriNetUnfolderBase]: For 2856/2859 co-relation queries the response was YES. [2024-06-20 15:13:29,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 395 events. 219/395 cut-off events. For 2856/2859 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1401 event pairs, 62 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 1729. Up to 311 conditions per place. [2024-06-20 15:13:29,903 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 35 selfloop transitions, 27 changer transitions 0/64 dead transitions. [2024-06-20 15:13:29,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 559 flow [2024-06-20 15:13:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-20 15:13:29,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-06-20 15:13:29,905 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 357 flow. Second operand 7 states and 82 transitions. [2024-06-20 15:13:29,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 559 flow [2024-06-20 15:13:29,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 514 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:29,909 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 422 flow [2024-06-20 15:13:29,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-06-20 15:13:29,910 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-20 15:13:29,910 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 422 flow [2024-06-20 15:13:29,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:29,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:29,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:29,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:13:29,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:29,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1093503596, now seen corresponding path program 1 times [2024-06-20 15:13:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:29,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913618163] [2024-06-20 15:13:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:30,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913618163] [2024-06-20 15:13:30,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913618163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:30,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:30,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771079266] [2024-06-20 15:13:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:30,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:30,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:30,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:30,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 422 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:30,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:30,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:30,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,074 INFO L124 PetriNetUnfolderBase]: 217/390 cut-off events. [2024-06-20 15:13:31,075 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-06-20 15:13:31,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 390 events. 217/390 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1365 event pairs, 47 based on Foata normal form. 1/390 useless extension candidates. Maximal degree in co-relation 1828. Up to 366 conditions per place. [2024-06-20 15:13:31,094 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 52 selfloop transitions, 14 changer transitions 0/68 dead transitions. [2024-06-20 15:13:31,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 622 flow [2024-06-20 15:13:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-20 15:13:31,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32661290322580644 [2024-06-20 15:13:31,096 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 422 flow. Second operand 8 states and 81 transitions. [2024-06-20 15:13:31,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 622 flow [2024-06-20 15:13:31,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 583 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:31,101 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 452 flow [2024-06-20 15:13:31,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=452, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-20 15:13:31,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-20 15:13:31,102 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 452 flow [2024-06-20 15:13:31,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:13:31,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:31,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash -742615604, now seen corresponding path program 1 times [2024-06-20 15:13:31,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235197935] [2024-06-20 15:13:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:31,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235197935] [2024-06-20 15:13:31,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235197935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:31,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:31,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:31,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675701577] [2024-06-20 15:13:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:31,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:31,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:31,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:31,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 452 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:31,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,782 INFO L124 PetriNetUnfolderBase]: 223/401 cut-off events. [2024-06-20 15:13:31,782 INFO L125 PetriNetUnfolderBase]: For 3777/3777 co-relation queries the response was YES. [2024-06-20 15:13:31,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 401 events. 223/401 cut-off events. For 3777/3777 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1434 event pairs, 55 based on Foata normal form. 2/401 useless extension candidates. Maximal degree in co-relation 1960. Up to 334 conditions per place. [2024-06-20 15:13:31,785 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 20 changer transitions 0/75 dead transitions. [2024-06-20 15:13:31,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 654 flow [2024-06-20 15:13:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-20 15:13:31,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-20 15:13:31,786 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 452 flow. Second operand 7 states and 83 transitions. [2024-06-20 15:13:31,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 654 flow [2024-06-20 15:13:31,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 627 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:31,793 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 492 flow [2024-06-20 15:13:31,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=492, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-06-20 15:13:31,794 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-20 15:13:31,795 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 492 flow [2024-06-20 15:13:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:31,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:13:31,796 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:31,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1173559012, now seen corresponding path program 2 times [2024-06-20 15:13:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026233338] [2024-06-20 15:13:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026233338] [2024-06-20 15:13:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026233338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340854525] [2024-06-20 15:13:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:32,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:32,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 492 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:32,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:32,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,514 INFO L124 PetriNetUnfolderBase]: 229/411 cut-off events. [2024-06-20 15:13:32,514 INFO L125 PetriNetUnfolderBase]: For 4404/4404 co-relation queries the response was YES. [2024-06-20 15:13:32,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 411 events. 229/411 cut-off events. For 4404/4404 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1480 event pairs, 55 based on Foata normal form. 2/411 useless extension candidates. Maximal degree in co-relation 2109. Up to 324 conditions per place. [2024-06-20 15:13:32,517 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 50 selfloop transitions, 23 changer transitions 0/75 dead transitions. [2024-06-20 15:13:32,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 696 flow [2024-06-20 15:13:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-20 15:13:32,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37327188940092165 [2024-06-20 15:13:32,518 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 492 flow. Second operand 7 states and 81 transitions. [2024-06-20 15:13:32,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 696 flow [2024-06-20 15:13:32,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 75 transitions, 643 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:32,524 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 517 flow [2024-06-20 15:13:32,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=517, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2024-06-20 15:13:32,525 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2024-06-20 15:13:32,525 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 517 flow [2024-06-20 15:13:32,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:32,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:13:32,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:32,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1173558795, now seen corresponding path program 1 times [2024-06-20 15:13:32,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725652318] [2024-06-20 15:13:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725652318] [2024-06-20 15:13:33,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725652318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:33,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310985882] [2024-06-20 15:13:33,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:33,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:33,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:33,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:33,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 517 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:33,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:33,448 INFO L124 PetriNetUnfolderBase]: 238/426 cut-off events. [2024-06-20 15:13:33,448 INFO L125 PetriNetUnfolderBase]: For 5113/5113 co-relation queries the response was YES. [2024-06-20 15:13:33,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 426 events. 238/426 cut-off events. For 5113/5113 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1560 event pairs, 53 based on Foata normal form. 3/427 useless extension candidates. Maximal degree in co-relation 2229. Up to 345 conditions per place. [2024-06-20 15:13:33,451 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 54 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-06-20 15:13:33,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 79 transitions, 737 flow [2024-06-20 15:13:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-20 15:13:33,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-20 15:13:33,453 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 517 flow. Second operand 8 states and 91 transitions. [2024-06-20 15:13:33,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 79 transitions, 737 flow [2024-06-20 15:13:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 79 transitions, 677 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:33,457 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 543 flow [2024-06-20 15:13:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=543, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-06-20 15:13:33,458 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-20 15:13:33,458 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 543 flow [2024-06-20 15:13:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:33,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:33,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:13:33,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:33,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1047266286, now seen corresponding path program 3 times [2024-06-20 15:13:33,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:33,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647956519] [2024-06-20 15:13:33,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:33,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647956519] [2024-06-20 15:13:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647956519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140195917] [2024-06-20 15:13:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:33,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:33,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 543 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:33,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,111 INFO L124 PetriNetUnfolderBase]: 239/429 cut-off events. [2024-06-20 15:13:34,111 INFO L125 PetriNetUnfolderBase]: For 5520/5523 co-relation queries the response was YES. [2024-06-20 15:13:34,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2342 conditions, 429 events. 239/429 cut-off events. For 5520/5523 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1585 event pairs, 64 based on Foata normal form. 2/428 useless extension candidates. Maximal degree in co-relation 2303. Up to 321 conditions per place. [2024-06-20 15:13:34,114 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 51 selfloop transitions, 27 changer transitions 0/80 dead transitions. [2024-06-20 15:13:34,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 817 flow [2024-06-20 15:13:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-20 15:13:34,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-20 15:13:34,116 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 543 flow. Second operand 7 states and 80 transitions. [2024-06-20 15:13:34,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 817 flow [2024-06-20 15:13:34,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 753 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:34,126 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 598 flow [2024-06-20 15:13:34,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-06-20 15:13:34,127 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-20 15:13:34,127 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 598 flow [2024-06-20 15:13:34,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:34,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:13:34,128 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 415063925, now seen corresponding path program 2 times [2024-06-20 15:13:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470507391] [2024-06-20 15:13:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470507391] [2024-06-20 15:13:34,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470507391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:34,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112702603] [2024-06-20 15:13:34,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:34,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:34,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:34,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:34,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 598 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:34,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:34,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:34,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:35,090 INFO L124 PetriNetUnfolderBase]: 252/450 cut-off events. [2024-06-20 15:13:35,090 INFO L125 PetriNetUnfolderBase]: For 6418/6421 co-relation queries the response was YES. [2024-06-20 15:13:35,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 450 events. 252/450 cut-off events. For 6418/6421 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1670 event pairs, 59 based on Foata normal form. 1/448 useless extension candidates. Maximal degree in co-relation 2493. Up to 336 conditions per place. [2024-06-20 15:13:35,094 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 51 selfloop transitions, 35 changer transitions 0/88 dead transitions. [2024-06-20 15:13:35,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 88 transitions, 942 flow [2024-06-20 15:13:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 15:13:35,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:13:35,095 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 598 flow. Second operand 8 states and 93 transitions. [2024-06-20 15:13:35,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 88 transitions, 942 flow [2024-06-20 15:13:35,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 896 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:35,103 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 726 flow [2024-06-20 15:13:35,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2024-06-20 15:13:35,104 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-20 15:13:35,104 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 726 flow [2024-06-20 15:13:35,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:35,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:35,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:35,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:13:35,106 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:35,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:35,107 INFO L85 PathProgramCache]: Analyzing trace with hash 453500017, now seen corresponding path program 3 times [2024-06-20 15:13:35,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:35,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862370962] [2024-06-20 15:13:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862370962] [2024-06-20 15:13:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862370962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:35,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:35,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360636209] [2024-06-20 15:13:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:35,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:35,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 726 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:35,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:35,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,018 INFO L124 PetriNetUnfolderBase]: 250/447 cut-off events. [2024-06-20 15:13:36,018 INFO L125 PetriNetUnfolderBase]: For 6901/6904 co-relation queries the response was YES. [2024-06-20 15:13:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2637 conditions, 447 events. 250/447 cut-off events. For 6901/6904 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1655 event pairs, 63 based on Foata normal form. 1/445 useless extension candidates. Maximal degree in co-relation 2594. Up to 379 conditions per place. [2024-06-20 15:13:36,027 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 63 selfloop transitions, 21 changer transitions 0/86 dead transitions. [2024-06-20 15:13:36,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 921 flow [2024-06-20 15:13:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-20 15:13:36,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-20 15:13:36,029 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 726 flow. Second operand 8 states and 86 transitions. [2024-06-20 15:13:36,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 921 flow [2024-06-20 15:13:36,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 863 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:36,038 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 726 flow [2024-06-20 15:13:36,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-06-20 15:13:36,038 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-20 15:13:36,039 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 726 flow [2024-06-20 15:13:36,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:13:36,039 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:36,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2134863833, now seen corresponding path program 4 times [2024-06-20 15:13:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081150116] [2024-06-20 15:13:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:36,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081150116] [2024-06-20 15:13:36,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081150116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:36,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:36,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:36,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030663345] [2024-06-20 15:13:36,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:36,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:36,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:36,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:36,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:36,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:36,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 726 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:36,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:36,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,908 INFO L124 PetriNetUnfolderBase]: 248/442 cut-off events. [2024-06-20 15:13:36,908 INFO L125 PetriNetUnfolderBase]: For 7060/7060 co-relation queries the response was YES. [2024-06-20 15:13:36,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 442 events. 248/442 cut-off events. For 7060/7060 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1636 event pairs, 49 based on Foata normal form. 1/442 useless extension candidates. Maximal degree in co-relation 2578. Up to 422 conditions per place. [2024-06-20 15:13:36,912 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 72 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-20 15:13:36,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 912 flow [2024-06-20 15:13:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-06-20 15:13:36,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3185483870967742 [2024-06-20 15:13:36,914 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 726 flow. Second operand 8 states and 79 transitions. [2024-06-20 15:13:36,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 912 flow [2024-06-20 15:13:36,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 86 transitions, 847 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:36,925 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 690 flow [2024-06-20 15:13:36,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=690, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2024-06-20 15:13:36,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-20 15:13:36,925 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 690 flow [2024-06-20 15:13:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:36,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:13:36,926 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:36,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 461128497, now seen corresponding path program 1 times [2024-06-20 15:13:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219687281] [2024-06-20 15:13:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219687281] [2024-06-20 15:13:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219687281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:38,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578469337] [2024-06-20 15:13:38,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:38,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:38,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 690 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:38,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:38,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:38,758 INFO L124 PetriNetUnfolderBase]: 246/439 cut-off events. [2024-06-20 15:13:38,759 INFO L125 PetriNetUnfolderBase]: For 7455/7455 co-relation queries the response was YES. [2024-06-20 15:13:38,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 439 events. 246/439 cut-off events. For 7455/7455 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1624 event pairs, 48 based on Foata normal form. 1/439 useless extension candidates. Maximal degree in co-relation 2537. Up to 416 conditions per place. [2024-06-20 15:13:38,762 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 71 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-20 15:13:38,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 87 transitions, 880 flow [2024-06-20 15:13:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-20 15:13:38,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2024-06-20 15:13:38,763 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 690 flow. Second operand 9 states and 87 transitions. [2024-06-20 15:13:38,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 87 transitions, 880 flow [2024-06-20 15:13:38,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 847 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:38,772 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 690 flow [2024-06-20 15:13:38,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=690, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2024-06-20 15:13:38,772 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-20 15:13:38,772 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 690 flow [2024-06-20 15:13:38,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:38,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:38,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:38,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:13:38,773 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:38,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1664398791, now seen corresponding path program 1 times [2024-06-20 15:13:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294041470] [2024-06-20 15:13:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:39,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294041470] [2024-06-20 15:13:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294041470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:39,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:39,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:39,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586478930] [2024-06-20 15:13:39,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:39,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:39,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:39,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:39,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 690 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:39,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:39,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:39,649 INFO L124 PetriNetUnfolderBase]: 250/447 cut-off events. [2024-06-20 15:13:39,649 INFO L125 PetriNetUnfolderBase]: For 8361/8361 co-relation queries the response was YES. [2024-06-20 15:13:39,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 447 events. 250/447 cut-off events. For 8361/8361 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1682 event pairs, 27 based on Foata normal form. 2/448 useless extension candidates. Maximal degree in co-relation 2594. Up to 346 conditions per place. [2024-06-20 15:13:39,652 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 74 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-20 15:13:39,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 948 flow [2024-06-20 15:13:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-20 15:13:39,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-20 15:13:39,660 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 690 flow. Second operand 7 states and 78 transitions. [2024-06-20 15:13:39,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 948 flow [2024-06-20 15:13:39,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 915 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:13:39,670 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 699 flow [2024-06-20 15:13:39,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=699, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-06-20 15:13:39,670 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-06-20 15:13:39,671 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 699 flow [2024-06-20 15:13:39,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:39,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:39,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:39,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:13:39,671 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:39,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1664338217, now seen corresponding path program 1 times [2024-06-20 15:13:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140088937] [2024-06-20 15:13:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:40,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140088937] [2024-06-20 15:13:40,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140088937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:40,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:40,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:40,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629212470] [2024-06-20 15:13:40,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:40,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:40,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 699 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:40,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:40,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:40,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:40,525 INFO L124 PetriNetUnfolderBase]: 248/444 cut-off events. [2024-06-20 15:13:40,525 INFO L125 PetriNetUnfolderBase]: For 8641/8641 co-relation queries the response was YES. [2024-06-20 15:13:40,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2655 conditions, 444 events. 248/444 cut-off events. For 8641/8641 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1672 event pairs, 44 based on Foata normal form. 1/444 useless extension candidates. Maximal degree in co-relation 2608. Up to 372 conditions per place. [2024-06-20 15:13:40,531 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 67 selfloop transitions, 21 changer transitions 0/90 dead transitions. [2024-06-20 15:13:40,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 90 transitions, 905 flow [2024-06-20 15:13:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-20 15:13:40,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-06-20 15:13:40,533 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 699 flow. Second operand 7 states and 82 transitions. [2024-06-20 15:13:40,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 90 transitions, 905 flow [2024-06-20 15:13:40,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:40,545 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 719 flow [2024-06-20 15:13:40,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=719, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2024-06-20 15:13:40,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-20 15:13:40,546 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 719 flow [2024-06-20 15:13:40,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:40,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:40,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:40,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:13:40,547 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:40,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:40,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1664338341, now seen corresponding path program 2 times [2024-06-20 15:13:40,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:40,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564055017] [2024-06-20 15:13:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:41,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:41,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564055017] [2024-06-20 15:13:41,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564055017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:41,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:41,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:41,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605045247] [2024-06-20 15:13:41,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:41,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:41,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:41,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:41,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:41,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:41,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 719 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:41,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:41,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:41,502 INFO L124 PetriNetUnfolderBase]: 245/439 cut-off events. [2024-06-20 15:13:41,502 INFO L125 PetriNetUnfolderBase]: For 9114/9114 co-relation queries the response was YES. [2024-06-20 15:13:41,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2647 conditions, 439 events. 245/439 cut-off events. For 9114/9114 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1624 event pairs, 45 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 2599. Up to 373 conditions per place. [2024-06-20 15:13:41,505 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 71 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-20 15:13:41,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 90 transitions, 921 flow [2024-06-20 15:13:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-20 15:13:41,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-20 15:13:41,507 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 719 flow. Second operand 7 states and 80 transitions. [2024-06-20 15:13:41,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 90 transitions, 921 flow [2024-06-20 15:13:41,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 858 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:41,517 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 694 flow [2024-06-20 15:13:41,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2024-06-20 15:13:41,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-20 15:13:41,518 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 694 flow [2024-06-20 15:13:41,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:41,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:41,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:41,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:13:41,518 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:41,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1546250537, now seen corresponding path program 2 times [2024-06-20 15:13:41,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:41,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902020689] [2024-06-20 15:13:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:41,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902020689] [2024-06-20 15:13:42,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902020689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:42,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:42,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:42,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143646871] [2024-06-20 15:13:42,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:42,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:42,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:42,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:42,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:42,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:42,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:42,393 INFO L124 PetriNetUnfolderBase]: 243/436 cut-off events. [2024-06-20 15:13:42,393 INFO L125 PetriNetUnfolderBase]: For 9209/9209 co-relation queries the response was YES. [2024-06-20 15:13:42,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 436 events. 243/436 cut-off events. For 9209/9209 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1613 event pairs, 44 based on Foata normal form. 1/436 useless extension candidates. Maximal degree in co-relation 2534. Up to 367 conditions per place. [2024-06-20 15:13:42,396 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 70 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-20 15:13:42,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 93 transitions, 914 flow [2024-06-20 15:13:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-20 15:13:42,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 15:13:42,397 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 694 flow. Second operand 7 states and 84 transitions. [2024-06-20 15:13:42,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 93 transitions, 914 flow [2024-06-20 15:13:42,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 93 transitions, 873 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:42,408 INFO L231 Difference]: Finished difference. Result has 96 places, 79 transitions, 703 flow [2024-06-20 15:13:42,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=96, PETRI_TRANSITIONS=79} [2024-06-20 15:13:42,409 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-20 15:13:42,409 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 79 transitions, 703 flow [2024-06-20 15:13:42,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:42,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:42,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:13:42,409 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:42,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1546072721, now seen corresponding path program 1 times [2024-06-20 15:13:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696924355] [2024-06-20 15:13:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696924355] [2024-06-20 15:13:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696924355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732999946] [2024-06-20 15:13:43,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:43,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:43,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 79 transitions, 703 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:43,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,242 INFO L124 PetriNetUnfolderBase]: 249/447 cut-off events. [2024-06-20 15:13:43,242 INFO L125 PetriNetUnfolderBase]: For 10274/10274 co-relation queries the response was YES. [2024-06-20 15:13:43,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2669 conditions, 447 events. 249/447 cut-off events. For 10274/10274 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1689 event pairs, 48 based on Foata normal form. 2/447 useless extension candidates. Maximal degree in co-relation 2620. Up to 352 conditions per place. [2024-06-20 15:13:43,250 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 68 selfloop transitions, 25 changer transitions 0/95 dead transitions. [2024-06-20 15:13:43,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 95 transitions, 955 flow [2024-06-20 15:13:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-20 15:13:43,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-20 15:13:43,252 INFO L175 Difference]: Start difference. First operand has 96 places, 79 transitions, 703 flow. Second operand 8 states and 90 transitions. [2024-06-20 15:13:43,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 95 transitions, 955 flow [2024-06-20 15:13:43,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 95 transitions, 856 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 15:13:43,264 INFO L231 Difference]: Finished difference. Result has 96 places, 81 transitions, 685 flow [2024-06-20 15:13:43,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=685, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2024-06-20 15:13:43,265 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-20 15:13:43,265 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 685 flow [2024-06-20 15:13:43,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:13:43,266 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:43,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2020762441, now seen corresponding path program 2 times [2024-06-20 15:13:43,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871941347] [2024-06-20 15:13:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871941347] [2024-06-20 15:13:43,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871941347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810431944] [2024-06-20 15:13:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:43,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:43,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:43,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 685 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:43,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:43,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,137 INFO L124 PetriNetUnfolderBase]: 255/457 cut-off events. [2024-06-20 15:13:44,138 INFO L125 PetriNetUnfolderBase]: For 11158/11158 co-relation queries the response was YES. [2024-06-20 15:13:44,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2717 conditions, 457 events. 255/457 cut-off events. For 11158/11158 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1734 event pairs, 52 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 2669. Up to 382 conditions per place. [2024-06-20 15:13:44,141 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2024-06-20 15:13:44,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 99 transitions, 951 flow [2024-06-20 15:13:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-20 15:13:44,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 15:13:44,142 INFO L175 Difference]: Start difference. First operand has 96 places, 81 transitions, 685 flow. Second operand 8 states and 92 transitions. [2024-06-20 15:13:44,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 99 transitions, 951 flow [2024-06-20 15:13:44,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 99 transitions, 886 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:44,154 INFO L231 Difference]: Finished difference. Result has 98 places, 83 transitions, 699 flow [2024-06-20 15:13:44,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=699, PETRI_PLACES=98, PETRI_TRANSITIONS=83} [2024-06-20 15:13:44,155 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-06-20 15:13:44,155 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 83 transitions, 699 flow [2024-06-20 15:13:44,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:44,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:13:44,156 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:44,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2020582703, now seen corresponding path program 1 times [2024-06-20 15:13:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358804874] [2024-06-20 15:13:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358804874] [2024-06-20 15:13:45,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358804874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:45,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:45,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397174137] [2024-06-20 15:13:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:45,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:45,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:45,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:45,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:45,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 83 transitions, 699 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:45,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:45,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:45,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,484 INFO L124 PetriNetUnfolderBase]: 264/472 cut-off events. [2024-06-20 15:13:45,485 INFO L125 PetriNetUnfolderBase]: For 12348/12348 co-relation queries the response was YES. [2024-06-20 15:13:45,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 472 events. 264/472 cut-off events. For 12348/12348 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1814 event pairs, 50 based on Foata normal form. 3/473 useless extension candidates. Maximal degree in co-relation 2770. Up to 380 conditions per place. [2024-06-20 15:13:45,492 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 73 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-20 15:13:45,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 101 transitions, 979 flow [2024-06-20 15:13:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 15:13:45,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 15:13:45,494 INFO L175 Difference]: Start difference. First operand has 98 places, 83 transitions, 699 flow. Second operand 9 states and 101 transitions. [2024-06-20 15:13:45,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 101 transitions, 979 flow [2024-06-20 15:13:45,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 101 transitions, 916 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:45,510 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 736 flow [2024-06-20 15:13:45,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=736, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2024-06-20 15:13:45,514 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-20 15:13:45,514 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 736 flow [2024-06-20 15:13:45,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:45,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:45,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:13:45,515 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:45,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2020582951, now seen corresponding path program 3 times [2024-06-20 15:13:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:45,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436907618] [2024-06-20 15:13:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436907618] [2024-06-20 15:13:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436907618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825249560] [2024-06-20 15:13:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:46,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:46,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:46,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 736 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:46,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,573 INFO L124 PetriNetUnfolderBase]: 270/482 cut-off events. [2024-06-20 15:13:46,573 INFO L125 PetriNetUnfolderBase]: For 12771/12771 co-relation queries the response was YES. [2024-06-20 15:13:46,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 482 events. 270/482 cut-off events. For 12771/12771 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1847 event pairs, 46 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 2900. Up to 357 conditions per place. [2024-06-20 15:13:46,576 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 68 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2024-06-20 15:13:46,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 102 transitions, 1012 flow [2024-06-20 15:13:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-20 15:13:46,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-20 15:13:46,577 INFO L175 Difference]: Start difference. First operand has 101 places, 86 transitions, 736 flow. Second operand 8 states and 91 transitions. [2024-06-20 15:13:46,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 102 transitions, 1012 flow [2024-06-20 15:13:46,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 102 transitions, 934 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:46,591 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 764 flow [2024-06-20 15:13:46,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=764, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2024-06-20 15:13:46,591 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-06-20 15:13:46,592 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 764 flow [2024-06-20 15:13:46,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:46,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:13:46,592 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:46,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash -17918639, now seen corresponding path program 2 times [2024-06-20 15:13:46,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256424126] [2024-06-20 15:13:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256424126] [2024-06-20 15:13:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256424126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836788898] [2024-06-20 15:13:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:47,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:47,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 764 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:47,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:47,936 INFO L124 PetriNetUnfolderBase]: 273/488 cut-off events. [2024-06-20 15:13:47,938 INFO L125 PetriNetUnfolderBase]: For 13526/13529 co-relation queries the response was YES. [2024-06-20 15:13:47,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 488 events. 273/488 cut-off events. For 13526/13529 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1861 event pairs, 57 based on Foata normal form. 1/486 useless extension candidates. Maximal degree in co-relation 2981. Up to 399 conditions per place. [2024-06-20 15:13:47,941 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 31 changer transitions 0/100 dead transitions. [2024-06-20 15:13:47,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 1008 flow [2024-06-20 15:13:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 15:13:47,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-20 15:13:47,942 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 764 flow. Second operand 9 states and 97 transitions. [2024-06-20 15:13:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 1008 flow [2024-06-20 15:13:47,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 920 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:47,958 INFO L231 Difference]: Finished difference. Result has 105 places, 90 transitions, 769 flow [2024-06-20 15:13:47,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2024-06-20 15:13:47,959 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2024-06-20 15:13:47,959 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 769 flow [2024-06-20 15:13:47,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:47,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:47,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:47,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:13:47,959 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:47,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1173600213, now seen corresponding path program 3 times [2024-06-20 15:13:47,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:47,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792011755] [2024-06-20 15:13:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:47,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:48,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:48,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792011755] [2024-06-20 15:13:48,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792011755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:48,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:48,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:48,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525760510] [2024-06-20 15:13:48,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:48,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:48,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:48,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:48,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:48,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:48,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:48,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:48,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:48,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,154 INFO L124 PetriNetUnfolderBase]: 276/493 cut-off events. [2024-06-20 15:13:49,154 INFO L125 PetriNetUnfolderBase]: For 14267/14270 co-relation queries the response was YES. [2024-06-20 15:13:49,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 493 events. 276/493 cut-off events. For 14267/14270 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1899 event pairs, 61 based on Foata normal form. 1/491 useless extension candidates. Maximal degree in co-relation 3015. Up to 422 conditions per place. [2024-06-20 15:13:49,159 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 76 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-06-20 15:13:49,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 101 transitions, 1013 flow [2024-06-20 15:13:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-20 15:13:49,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33691756272401435 [2024-06-20 15:13:49,161 INFO L175 Difference]: Start difference. First operand has 105 places, 90 transitions, 769 flow. Second operand 9 states and 94 transitions. [2024-06-20 15:13:49,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 101 transitions, 1013 flow [2024-06-20 15:13:49,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 101 transitions, 936 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:49,179 INFO L231 Difference]: Finished difference. Result has 107 places, 92 transitions, 773 flow [2024-06-20 15:13:49,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=773, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2024-06-20 15:13:49,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-20 15:13:49,179 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 773 flow [2024-06-20 15:13:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:49,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:49,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:13:49,180 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:49,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1401494605, now seen corresponding path program 4 times [2024-06-20 15:13:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395442187] [2024-06-20 15:13:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:49,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395442187] [2024-06-20 15:13:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395442187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:49,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:49,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801507239] [2024-06-20 15:13:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:49,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:49,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:49,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:49,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 773 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:49,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:49,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:49,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:50,128 INFO L124 PetriNetUnfolderBase]: 292/519 cut-off events. [2024-06-20 15:13:50,128 INFO L125 PetriNetUnfolderBase]: For 17094/17097 co-relation queries the response was YES. [2024-06-20 15:13:50,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3326 conditions, 519 events. 292/519 cut-off events. For 17094/17097 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2044 event pairs, 61 based on Foata normal form. 2/518 useless extension candidates. Maximal degree in co-relation 3273. Up to 334 conditions per place. [2024-06-20 15:13:50,131 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 67 selfloop transitions, 42 changer transitions 0/111 dead transitions. [2024-06-20 15:13:50,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 111 transitions, 1263 flow [2024-06-20 15:13:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 15:13:50,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:13:50,133 INFO L175 Difference]: Start difference. First operand has 107 places, 92 transitions, 773 flow. Second operand 8 states and 93 transitions. [2024-06-20 15:13:50,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 111 transitions, 1263 flow [2024-06-20 15:13:50,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 111 transitions, 1198 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:50,148 INFO L231 Difference]: Finished difference. Result has 108 places, 98 transitions, 909 flow [2024-06-20 15:13:50,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=909, PETRI_PLACES=108, PETRI_TRANSITIONS=98} [2024-06-20 15:13:50,148 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2024-06-20 15:13:50,149 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 98 transitions, 909 flow [2024-06-20 15:13:50,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:13:50,149 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:50,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash -17918887, now seen corresponding path program 5 times [2024-06-20 15:13:50,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958278744] [2024-06-20 15:13:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:50,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958278744] [2024-06-20 15:13:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958278744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:50,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313515767] [2024-06-20 15:13:50,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:50,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:50,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:50,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 98 transitions, 909 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:50,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:50,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:50,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,122 INFO L124 PetriNetUnfolderBase]: 293/521 cut-off events. [2024-06-20 15:13:51,123 INFO L125 PetriNetUnfolderBase]: For 17824/17827 co-relation queries the response was YES. [2024-06-20 15:13:51,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3425 conditions, 521 events. 293/521 cut-off events. For 17824/17827 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2052 event pairs, 64 based on Foata normal form. 2/520 useless extension candidates. Maximal degree in co-relation 3371. Up to 337 conditions per place. [2024-06-20 15:13:51,126 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 69 selfloop transitions, 43 changer transitions 0/114 dead transitions. [2024-06-20 15:13:51,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 114 transitions, 1347 flow [2024-06-20 15:13:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-20 15:13:51,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-20 15:13:51,128 INFO L175 Difference]: Start difference. First operand has 108 places, 98 transitions, 909 flow. Second operand 8 states and 95 transitions. [2024-06-20 15:13:51,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 114 transitions, 1347 flow [2024-06-20 15:13:51,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 1292 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:51,146 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 985 flow [2024-06-20 15:13:51,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=985, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2024-06-20 15:13:51,146 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-06-20 15:13:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 985 flow [2024-06-20 15:13:51,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:51,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:51,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:51,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:13:51,147 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:51,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash -9347759, now seen corresponding path program 4 times [2024-06-20 15:13:51,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:51,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996854466] [2024-06-20 15:13:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:51,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996854466] [2024-06-20 15:13:52,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996854466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754515741] [2024-06-20 15:13:52,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:52,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:52,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:52,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 100 transitions, 985 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:52,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,506 INFO L124 PetriNetUnfolderBase]: 304/537 cut-off events. [2024-06-20 15:13:52,506 INFO L125 PetriNetUnfolderBase]: For 19336/19336 co-relation queries the response was YES. [2024-06-20 15:13:52,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3651 conditions, 537 events. 304/537 cut-off events. For 19336/19336 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2128 event pairs, 50 based on Foata normal form. 2/538 useless extension candidates. Maximal degree in co-relation 3595. Up to 504 conditions per place. [2024-06-20 15:13:52,512 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 95 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2024-06-20 15:13:52,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 116 transitions, 1361 flow [2024-06-20 15:13:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:13:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:13:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-20 15:13:52,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-20 15:13:52,513 INFO L175 Difference]: Start difference. First operand has 113 places, 100 transitions, 985 flow. Second operand 10 states and 98 transitions. [2024-06-20 15:13:52,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 116 transitions, 1361 flow [2024-06-20 15:13:52,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 116 transitions, 1242 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:52,544 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 975 flow [2024-06-20 15:13:52,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=975, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2024-06-20 15:13:52,545 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-06-20 15:13:52,545 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 975 flow [2024-06-20 15:13:52,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:13:52,546 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:52,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1409775325, now seen corresponding path program 6 times [2024-06-20 15:13:52,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291264885] [2024-06-20 15:13:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291264885] [2024-06-20 15:13:53,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291264885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:13:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149193512] [2024-06-20 15:13:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:13:53,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:13:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:13:53,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:53,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:53,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:53,396 INFO L124 PetriNetUnfolderBase]: 300/531 cut-off events. [2024-06-20 15:13:53,397 INFO L125 PetriNetUnfolderBase]: For 18804/18804 co-relation queries the response was YES. [2024-06-20 15:13:53,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3512 conditions, 531 events. 300/531 cut-off events. For 18804/18804 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2104 event pairs, 50 based on Foata normal form. 2/532 useless extension candidates. Maximal degree in co-relation 3455. Up to 505 conditions per place. [2024-06-20 15:13:53,400 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 99 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2024-06-20 15:13:53,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 1223 flow [2024-06-20 15:13:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-20 15:13:53,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32661290322580644 [2024-06-20 15:13:53,401 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 975 flow. Second operand 8 states and 81 transitions. [2024-06-20 15:13:53,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 1223 flow [2024-06-20 15:13:53,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 1148 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:53,423 INFO L231 Difference]: Finished difference. Result has 119 places, 105 transitions, 931 flow [2024-06-20 15:13:53,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=119, PETRI_TRANSITIONS=105} [2024-06-20 15:13:53,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-06-20 15:13:53,424 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 105 transitions, 931 flow [2024-06-20 15:13:53,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:13:53,425 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:53,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -9644429, now seen corresponding path program 5 times [2024-06-20 15:13:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873132180] [2024-06-20 15:13:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873132180] [2024-06-20 15:13:54,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873132180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:54,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762021685] [2024-06-20 15:13:54,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:54,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:54,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:54,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 105 transitions, 931 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:54,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,625 INFO L124 PetriNetUnfolderBase]: 313/554 cut-off events. [2024-06-20 15:13:54,626 INFO L125 PetriNetUnfolderBase]: For 20079/20082 co-relation queries the response was YES. [2024-06-20 15:13:54,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 554 events. 313/554 cut-off events. For 20079/20082 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2211 event pairs, 59 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 3595. Up to 379 conditions per place. [2024-06-20 15:13:54,629 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 70 selfloop transitions, 51 changer transitions 0/123 dead transitions. [2024-06-20 15:13:54,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 123 transitions, 1371 flow [2024-06-20 15:13:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-20 15:13:54,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-20 15:13:54,631 INFO L175 Difference]: Start difference. First operand has 119 places, 105 transitions, 931 flow. Second operand 9 states and 105 transitions. [2024-06-20 15:13:54,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 123 transitions, 1371 flow [2024-06-20 15:13:54,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 123 transitions, 1340 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:54,659 INFO L231 Difference]: Finished difference. Result has 122 places, 110 transitions, 1122 flow [2024-06-20 15:13:54,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1122, PETRI_PLACES=122, PETRI_TRANSITIONS=110} [2024-06-20 15:13:54,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-20 15:13:54,660 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 110 transitions, 1122 flow [2024-06-20 15:13:54,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:13:54,661 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:54,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1410083155, now seen corresponding path program 1 times [2024-06-20 15:13:54,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675643499] [2024-06-20 15:13:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675643499] [2024-06-20 15:13:56,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675643499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:13:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734095823] [2024-06-20 15:13:56,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:13:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:13:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:13:56,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:56,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 110 transitions, 1122 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:56,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:56,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,001 INFO L124 PetriNetUnfolderBase]: 310/547 cut-off events. [2024-06-20 15:13:57,001 INFO L125 PetriNetUnfolderBase]: For 20734/20734 co-relation queries the response was YES. [2024-06-20 15:13:57,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3790 conditions, 547 events. 310/547 cut-off events. For 20734/20734 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2160 event pairs, 51 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 3729. Up to 518 conditions per place. [2024-06-20 15:13:57,005 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 104 selfloop transitions, 15 changer transitions 0/121 dead transitions. [2024-06-20 15:13:57,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 121 transitions, 1384 flow [2024-06-20 15:13:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:13:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:13:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-06-20 15:13:57,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3032258064516129 [2024-06-20 15:13:57,006 INFO L175 Difference]: Start difference. First operand has 122 places, 110 transitions, 1122 flow. Second operand 10 states and 94 transitions. [2024-06-20 15:13:57,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 121 transitions, 1384 flow [2024-06-20 15:13:57,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 121 transitions, 1305 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:57,032 INFO L231 Difference]: Finished difference. Result has 127 places, 110 transitions, 1077 flow [2024-06-20 15:13:57,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1077, PETRI_PLACES=127, PETRI_TRANSITIONS=110} [2024-06-20 15:13:57,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-20 15:13:57,033 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 110 transitions, 1077 flow [2024-06-20 15:13:57,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:57,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:13:57,034 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:57,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,034 INFO L85 PathProgramCache]: Analyzing trace with hash -56753457, now seen corresponding path program 1 times [2024-06-20 15:13:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337211173] [2024-06-20 15:13:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:57,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:57,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337211173] [2024-06-20 15:13:57,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337211173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:57,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:57,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:57,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901972687] [2024-06-20 15:13:57,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:57,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:57,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:57,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 110 transitions, 1077 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:57,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:57,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:57,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,883 INFO L124 PetriNetUnfolderBase]: 314/555 cut-off events. [2024-06-20 15:13:57,883 INFO L125 PetriNetUnfolderBase]: For 21487/21487 co-relation queries the response was YES. [2024-06-20 15:13:57,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3829 conditions, 555 events. 314/555 cut-off events. For 21487/21487 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2209 event pairs, 30 based on Foata normal form. 2/556 useless extension candidates. Maximal degree in co-relation 3766. Up to 449 conditions per place. [2024-06-20 15:13:57,889 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 106 selfloop transitions, 17 changer transitions 0/125 dead transitions. [2024-06-20 15:13:57,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 125 transitions, 1369 flow [2024-06-20 15:13:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-20 15:13:57,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34274193548387094 [2024-06-20 15:13:57,891 INFO L175 Difference]: Start difference. First operand has 127 places, 110 transitions, 1077 flow. Second operand 8 states and 85 transitions. [2024-06-20 15:13:57,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 125 transitions, 1369 flow [2024-06-20 15:13:57,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 1325 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:13:57,932 INFO L231 Difference]: Finished difference. Result has 126 places, 111 transitions, 1087 flow [2024-06-20 15:13:57,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=126, PETRI_TRANSITIONS=111} [2024-06-20 15:13:57,933 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-20 15:13:57,933 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 111 transitions, 1087 flow [2024-06-20 15:13:57,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:57,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:13:57,934 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:57,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash -54875787, now seen corresponding path program 2 times [2024-06-20 15:13:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878033770] [2024-06-20 15:13:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878033770] [2024-06-20 15:13:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878033770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:58,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:58,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:58,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802762303] [2024-06-20 15:13:58,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:58,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:58,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:58,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:58,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:58,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:58,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 111 transitions, 1087 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:58,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:58,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:58,889 INFO L124 PetriNetUnfolderBase]: 318/563 cut-off events. [2024-06-20 15:13:58,889 INFO L125 PetriNetUnfolderBase]: For 22697/22697 co-relation queries the response was YES. [2024-06-20 15:13:58,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 563 events. 318/563 cut-off events. For 22697/22697 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2279 event pairs, 48 based on Foata normal form. 2/564 useless extension candidates. Maximal degree in co-relation 3837. Up to 483 conditions per place. [2024-06-20 15:13:58,893 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 101 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-06-20 15:13:58,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 125 transitions, 1383 flow [2024-06-20 15:13:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-20 15:13:58,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-20 15:13:58,894 INFO L175 Difference]: Start difference. First operand has 126 places, 111 transitions, 1087 flow. Second operand 8 states and 90 transitions. [2024-06-20 15:13:58,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 125 transitions, 1383 flow [2024-06-20 15:13:58,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 125 transitions, 1339 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:58,930 INFO L231 Difference]: Finished difference. Result has 128 places, 112 transitions, 1110 flow [2024-06-20 15:13:58,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1110, PETRI_PLACES=128, PETRI_TRANSITIONS=112} [2024-06-20 15:13:58,930 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-20 15:13:58,930 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 112 transitions, 1110 flow [2024-06-20 15:13:58,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:58,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:13:58,931 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:58,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash -54879507, now seen corresponding path program 3 times [2024-06-20 15:13:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626800902] [2024-06-20 15:13:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:59,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:59,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626800902] [2024-06-20 15:13:59,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626800902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:59,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:59,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:13:59,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042829816] [2024-06-20 15:13:59,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:59,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:13:59,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:59,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:13:59,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:13:59,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:13:59,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 112 transitions, 1110 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:59,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:59,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:13:59,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:59,861 INFO L124 PetriNetUnfolderBase]: 322/571 cut-off events. [2024-06-20 15:13:59,861 INFO L125 PetriNetUnfolderBase]: For 24303/24303 co-relation queries the response was YES. [2024-06-20 15:13:59,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3974 conditions, 571 events. 322/571 cut-off events. For 24303/24303 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2330 event pairs, 52 based on Foata normal form. 2/572 useless extension candidates. Maximal degree in co-relation 3910. Up to 497 conditions per place. [2024-06-20 15:13:59,866 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 106 selfloop transitions, 18 changer transitions 0/126 dead transitions. [2024-06-20 15:13:59,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 126 transitions, 1406 flow [2024-06-20 15:13:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 15:13:59,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:13:59,874 INFO L175 Difference]: Start difference. First operand has 128 places, 112 transitions, 1110 flow. Second operand 8 states and 88 transitions. [2024-06-20 15:13:59,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 126 transitions, 1406 flow [2024-06-20 15:13:59,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 126 transitions, 1351 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:59,913 INFO L231 Difference]: Finished difference. Result has 130 places, 113 transitions, 1115 flow [2024-06-20 15:13:59,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=130, PETRI_TRANSITIONS=113} [2024-06-20 15:13:59,914 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-20 15:13:59,914 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 113 transitions, 1115 flow [2024-06-20 15:13:59,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:59,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:59,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:13:59,915 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:13:59,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1796875794, now seen corresponding path program 1 times [2024-06-20 15:13:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:59,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729957068] [2024-06-20 15:13:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729957068] [2024-06-20 15:14:00,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729957068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:00,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042494312] [2024-06-20 15:14:00,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:00,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:00,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:00,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:00,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 113 transitions, 1115 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:00,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:00,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:00,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,047 INFO L124 PetriNetUnfolderBase]: 320/568 cut-off events. [2024-06-20 15:14:01,047 INFO L125 PetriNetUnfolderBase]: For 23796/23796 co-relation queries the response was YES. [2024-06-20 15:14:01,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3919 conditions, 568 events. 320/568 cut-off events. For 23796/23796 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2306 event pairs, 49 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 3854. Up to 482 conditions per place. [2024-06-20 15:14:01,051 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 98 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2024-06-20 15:14:01,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 126 transitions, 1401 flow [2024-06-20 15:14:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-20 15:14:01,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 15:14:01,052 INFO L175 Difference]: Start difference. First operand has 130 places, 113 transitions, 1115 flow. Second operand 8 states and 92 transitions. [2024-06-20 15:14:01,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 126 transitions, 1401 flow [2024-06-20 15:14:01,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 126 transitions, 1347 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:01,093 INFO L231 Difference]: Finished difference. Result has 132 places, 113 transitions, 1122 flow [2024-06-20 15:14:01,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1122, PETRI_PLACES=132, PETRI_TRANSITIONS=113} [2024-06-20 15:14:01,093 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-20 15:14:01,094 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 113 transitions, 1122 flow [2024-06-20 15:14:01,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:01,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:14:01,094 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:01,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1780721521, now seen corresponding path program 4 times [2024-06-20 15:14:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552139558] [2024-06-20 15:14:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552139558] [2024-06-20 15:14:01,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552139558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:01,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:01,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:01,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115580981] [2024-06-20 15:14:01,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:01,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:01,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:01,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:01,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 113 transitions, 1122 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:01,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:01,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,045 INFO L124 PetriNetUnfolderBase]: 324/576 cut-off events. [2024-06-20 15:14:02,045 INFO L125 PetriNetUnfolderBase]: For 25834/25834 co-relation queries the response was YES. [2024-06-20 15:14:02,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 576 events. 324/576 cut-off events. For 25834/25834 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2364 event pairs, 32 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 3936. Up to 484 conditions per place. [2024-06-20 15:14:02,049 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 108 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-06-20 15:14:02,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 130 transitions, 1436 flow [2024-06-20 15:14:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-20 15:14:02,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-20 15:14:02,050 INFO L175 Difference]: Start difference. First operand has 132 places, 113 transitions, 1122 flow. Second operand 8 states and 91 transitions. [2024-06-20 15:14:02,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 130 transitions, 1436 flow [2024-06-20 15:14:02,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 1367 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:02,093 INFO L231 Difference]: Finished difference. Result has 133 places, 114 transitions, 1119 flow [2024-06-20 15:14:02,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=133, PETRI_TRANSITIONS=114} [2024-06-20 15:14:02,094 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-06-20 15:14:02,094 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 114 transitions, 1119 flow [2024-06-20 15:14:02,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:14:02,095 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:02,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash -689125003, now seen corresponding path program 5 times [2024-06-20 15:14:02,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073351673] [2024-06-20 15:14:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073351673] [2024-06-20 15:14:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073351673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:02,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621529111] [2024-06-20 15:14:02,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:02,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:02,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:02,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:02,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 114 transitions, 1119 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:02,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:03,102 INFO L124 PetriNetUnfolderBase]: 328/584 cut-off events. [2024-06-20 15:14:03,103 INFO L125 PetriNetUnfolderBase]: For 27298/27298 co-relation queries the response was YES. [2024-06-20 15:14:03,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4078 conditions, 584 events. 328/584 cut-off events. For 27298/27298 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2406 event pairs, 51 based on Foata normal form. 2/585 useless extension candidates. Maximal degree in co-relation 4011. Up to 507 conditions per place. [2024-06-20 15:14:03,106 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 107 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2024-06-20 15:14:03,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 131 transitions, 1441 flow [2024-06-20 15:14:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-20 15:14:03,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 15:14:03,108 INFO L175 Difference]: Start difference. First operand has 133 places, 114 transitions, 1119 flow. Second operand 8 states and 92 transitions. [2024-06-20 15:14:03,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 131 transitions, 1441 flow [2024-06-20 15:14:03,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 131 transitions, 1385 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:03,155 INFO L231 Difference]: Finished difference. Result has 135 places, 115 transitions, 1136 flow [2024-06-20 15:14:03,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=135, PETRI_TRANSITIONS=115} [2024-06-20 15:14:03,155 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-20 15:14:03,155 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 115 transitions, 1136 flow [2024-06-20 15:14:03,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:14:03,156 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:03,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1780725396, now seen corresponding path program 2 times [2024-06-20 15:14:03,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619884684] [2024-06-20 15:14:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:03,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:03,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619884684] [2024-06-20 15:14:03,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619884684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:03,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:03,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:03,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76847731] [2024-06-20 15:14:03,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:03,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:03,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:03,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:03,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:04,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:04,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 115 transitions, 1136 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:04,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,312 INFO L124 PetriNetUnfolderBase]: 326/581 cut-off events. [2024-06-20 15:14:04,313 INFO L125 PetriNetUnfolderBase]: For 26640/26640 co-relation queries the response was YES. [2024-06-20 15:14:04,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 581 events. 326/581 cut-off events. For 26640/26640 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2399 event pairs, 50 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 3952. Up to 501 conditions per place. [2024-06-20 15:14:04,316 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 104 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2024-06-20 15:14:04,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 131 transitions, 1440 flow [2024-06-20 15:14:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 15:14:04,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:14:04,317 INFO L175 Difference]: Start difference. First operand has 135 places, 115 transitions, 1136 flow. Second operand 8 states and 93 transitions. [2024-06-20 15:14:04,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 131 transitions, 1440 flow [2024-06-20 15:14:04,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 131 transitions, 1377 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:04,363 INFO L231 Difference]: Finished difference. Result has 137 places, 115 transitions, 1131 flow [2024-06-20 15:14:04,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1131, PETRI_PLACES=137, PETRI_TRANSITIONS=115} [2024-06-20 15:14:04,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-20 15:14:04,364 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 115 transitions, 1131 flow [2024-06-20 15:14:04,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:04,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:04,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:14:04,365 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:04,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1780875343, now seen corresponding path program 1 times [2024-06-20 15:14:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789608127] [2024-06-20 15:14:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789608127] [2024-06-20 15:14:05,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789608127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277915471] [2024-06-20 15:14:05,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:05,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:05,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:05,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 115 transitions, 1131 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:05,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,858 INFO L124 PetriNetUnfolderBase]: 332/592 cut-off events. [2024-06-20 15:14:05,858 INFO L125 PetriNetUnfolderBase]: For 28696/28696 co-relation queries the response was YES. [2024-06-20 15:14:05,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 592 events. 332/592 cut-off events. For 28696/28696 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2469 event pairs, 56 based on Foata normal form. 2/592 useless extension candidates. Maximal degree in co-relation 4028. Up to 509 conditions per place. [2024-06-20 15:14:05,862 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 24 changer transitions 0/135 dead transitions. [2024-06-20 15:14:05,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 135 transitions, 1489 flow [2024-06-20 15:14:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 15:14:05,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 15:14:05,865 INFO L175 Difference]: Start difference. First operand has 137 places, 115 transitions, 1131 flow. Second operand 9 states and 101 transitions. [2024-06-20 15:14:05,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 135 transitions, 1489 flow [2024-06-20 15:14:05,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 135 transitions, 1374 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:05,915 INFO L231 Difference]: Finished difference. Result has 138 places, 117 transitions, 1111 flow [2024-06-20 15:14:05,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1111, PETRI_PLACES=138, PETRI_TRANSITIONS=117} [2024-06-20 15:14:05,919 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-20 15:14:05,919 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 117 transitions, 1111 flow [2024-06-20 15:14:05,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:14:05,921 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:05,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1786231771, now seen corresponding path program 6 times [2024-06-20 15:14:05,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605629996] [2024-06-20 15:14:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605629996] [2024-06-20 15:14:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605629996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972327446] [2024-06-20 15:14:06,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:06,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:06,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 117 transitions, 1111 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:06,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,833 INFO L124 PetriNetUnfolderBase]: 336/600 cut-off events. [2024-06-20 15:14:06,834 INFO L125 PetriNetUnfolderBase]: For 30235/30235 co-relation queries the response was YES. [2024-06-20 15:14:06,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4156 conditions, 600 events. 336/600 cut-off events. For 30235/30235 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2521 event pairs, 50 based on Foata normal form. 2/600 useless extension candidates. Maximal degree in co-relation 4087. Up to 507 conditions per place. [2024-06-20 15:14:06,837 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 106 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2024-06-20 15:14:06,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 132 transitions, 1435 flow [2024-06-20 15:14:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-20 15:14:06,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-20 15:14:06,838 INFO L175 Difference]: Start difference. First operand has 138 places, 117 transitions, 1111 flow. Second operand 8 states and 89 transitions. [2024-06-20 15:14:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 132 transitions, 1435 flow [2024-06-20 15:14:06,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 132 transitions, 1356 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:06,908 INFO L231 Difference]: Finished difference. Result has 139 places, 118 transitions, 1110 flow [2024-06-20 15:14:06,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1110, PETRI_PLACES=139, PETRI_TRANSITIONS=118} [2024-06-20 15:14:06,909 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-20 15:14:06,909 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 118 transitions, 1110 flow [2024-06-20 15:14:06,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:14:06,910 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:06,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1786237723, now seen corresponding path program 2 times [2024-06-20 15:14:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512188726] [2024-06-20 15:14:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512188726] [2024-06-20 15:14:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512188726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169855980] [2024-06-20 15:14:08,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:08,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:08,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 118 transitions, 1110 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:08,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,491 INFO L124 PetriNetUnfolderBase]: 342/610 cut-off events. [2024-06-20 15:14:08,491 INFO L125 PetriNetUnfolderBase]: For 31624/31624 co-relation queries the response was YES. [2024-06-20 15:14:08,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4229 conditions, 610 events. 342/610 cut-off events. For 31624/31624 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2576 event pairs, 50 based on Foata normal form. 2/610 useless extension candidates. Maximal degree in co-relation 4159. Up to 507 conditions per place. [2024-06-20 15:14:08,496 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-06-20 15:14:08,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 136 transitions, 1472 flow [2024-06-20 15:14:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 15:14:08,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:14:08,497 INFO L175 Difference]: Start difference. First operand has 139 places, 118 transitions, 1110 flow. Second operand 9 states and 99 transitions. [2024-06-20 15:14:08,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 136 transitions, 1472 flow [2024-06-20 15:14:08,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 136 transitions, 1404 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:08,568 INFO L231 Difference]: Finished difference. Result has 142 places, 120 transitions, 1147 flow [2024-06-20 15:14:08,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1147, PETRI_PLACES=142, PETRI_TRANSITIONS=120} [2024-06-20 15:14:08,569 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-20 15:14:08,569 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 120 transitions, 1147 flow [2024-06-20 15:14:08,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:14:08,577 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1786439533, now seen corresponding path program 3 times [2024-06-20 15:14:08,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944741007] [2024-06-20 15:14:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944741007] [2024-06-20 15:14:09,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944741007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563549999] [2024-06-20 15:14:09,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:09,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:09,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 120 transitions, 1147 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:09,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,113 INFO L124 PetriNetUnfolderBase]: 348/620 cut-off events. [2024-06-20 15:14:10,114 INFO L125 PetriNetUnfolderBase]: For 32873/32873 co-relation queries the response was YES. [2024-06-20 15:14:10,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 620 events. 348/620 cut-off events. For 32873/32873 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2636 event pairs, 49 based on Foata normal form. 2/620 useless extension candidates. Maximal degree in co-relation 4267. Up to 487 conditions per place. [2024-06-20 15:14:10,117 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 102 selfloop transitions, 34 changer transitions 0/138 dead transitions. [2024-06-20 15:14:10,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 138 transitions, 1517 flow [2024-06-20 15:14:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 15:14:10,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 15:14:10,119 INFO L175 Difference]: Start difference. First operand has 142 places, 120 transitions, 1147 flow. Second operand 9 states and 100 transitions. [2024-06-20 15:14:10,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 138 transitions, 1517 flow [2024-06-20 15:14:10,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 138 transitions, 1428 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:10,185 INFO L231 Difference]: Finished difference. Result has 144 places, 122 transitions, 1181 flow [2024-06-20 15:14:10,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1181, PETRI_PLACES=144, PETRI_TRANSITIONS=122} [2024-06-20 15:14:10,186 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-20 15:14:10,186 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 122 transitions, 1181 flow [2024-06-20 15:14:10,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:10,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:10,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:14:10,187 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:10,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1786447252, now seen corresponding path program 1 times [2024-06-20 15:14:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:10,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351989646] [2024-06-20 15:14:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:10,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351989646] [2024-06-20 15:14:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351989646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:11,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084980233] [2024-06-20 15:14:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:11,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:11,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 122 transitions, 1181 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:11,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,838 INFO L124 PetriNetUnfolderBase]: 352/627 cut-off events. [2024-06-20 15:14:11,838 INFO L125 PetriNetUnfolderBase]: For 34540/34540 co-relation queries the response was YES. [2024-06-20 15:14:11,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4392 conditions, 627 events. 352/627 cut-off events. For 34540/34540 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2666 event pairs, 57 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 4320. Up to 524 conditions per place. [2024-06-20 15:14:11,842 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 111 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-06-20 15:14:11,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 142 transitions, 1570 flow [2024-06-20 15:14:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 15:14:11,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-20 15:14:11,844 INFO L175 Difference]: Start difference. First operand has 144 places, 122 transitions, 1181 flow. Second operand 10 states and 111 transitions. [2024-06-20 15:14:11,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 142 transitions, 1570 flow [2024-06-20 15:14:11,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 142 transitions, 1463 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:11,910 INFO L231 Difference]: Finished difference. Result has 147 places, 125 transitions, 1199 flow [2024-06-20 15:14:11,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1199, PETRI_PLACES=147, PETRI_TRANSITIONS=125} [2024-06-20 15:14:11,911 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-20 15:14:11,911 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 125 transitions, 1199 flow [2024-06-20 15:14:11,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:14:11,911 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:11,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1796080399, now seen corresponding path program 4 times [2024-06-20 15:14:11,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694284728] [2024-06-20 15:14:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:13,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694284728] [2024-06-20 15:14:13,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694284728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:13,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:13,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:13,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436923001] [2024-06-20 15:14:13,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:13,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:13,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:13,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 125 transitions, 1199 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:13,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,360 INFO L124 PetriNetUnfolderBase]: 358/637 cut-off events. [2024-06-20 15:14:13,360 INFO L125 PetriNetUnfolderBase]: For 34735/34735 co-relation queries the response was YES. [2024-06-20 15:14:13,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4464 conditions, 637 events. 358/637 cut-off events. For 34735/34735 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2723 event pairs, 47 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 4391. Up to 466 conditions per place. [2024-06-20 15:14:13,364 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 98 selfloop transitions, 43 changer transitions 0/143 dead transitions. [2024-06-20 15:14:13,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 143 transitions, 1583 flow [2024-06-20 15:14:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 15:14:13,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 15:14:13,365 INFO L175 Difference]: Start difference. First operand has 147 places, 125 transitions, 1199 flow. Second operand 9 states and 101 transitions. [2024-06-20 15:14:13,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 143 transitions, 1583 flow [2024-06-20 15:14:13,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 143 transitions, 1489 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:13,439 INFO L231 Difference]: Finished difference. Result has 148 places, 127 transitions, 1251 flow [2024-06-20 15:14:13,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1251, PETRI_PLACES=148, PETRI_TRANSITIONS=127} [2024-06-20 15:14:13,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-20 15:14:13,440 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 127 transitions, 1251 flow [2024-06-20 15:14:13,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:13,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:14:13,441 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:13,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash -289778924, now seen corresponding path program 2 times [2024-06-20 15:14:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:13,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524476428] [2024-06-20 15:14:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524476428] [2024-06-20 15:14:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524476428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:14,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:14,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131493142] [2024-06-20 15:14:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:14,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:14,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 127 transitions, 1251 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:14,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:14,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:14,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,074 INFO L124 PetriNetUnfolderBase]: 356/633 cut-off events. [2024-06-20 15:14:15,074 INFO L125 PetriNetUnfolderBase]: For 33450/33450 co-relation queries the response was YES. [2024-06-20 15:14:15,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4456 conditions, 633 events. 356/633 cut-off events. For 33450/33450 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2691 event pairs, 56 based on Foata normal form. 1/633 useless extension candidates. Maximal degree in co-relation 4382. Up to 601 conditions per place. [2024-06-20 15:14:15,079 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-20 15:14:15,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 138 transitions, 1547 flow [2024-06-20 15:14:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-20 15:14:15,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30498533724340177 [2024-06-20 15:14:15,081 INFO L175 Difference]: Start difference. First operand has 148 places, 127 transitions, 1251 flow. Second operand 11 states and 104 transitions. [2024-06-20 15:14:15,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 138 transitions, 1547 flow [2024-06-20 15:14:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 138 transitions, 1403 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:15,147 INFO L231 Difference]: Finished difference. Result has 152 places, 127 transitions, 1150 flow [2024-06-20 15:14:15,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1150, PETRI_PLACES=152, PETRI_TRANSITIONS=127} [2024-06-20 15:14:15,148 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-20 15:14:15,148 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 127 transitions, 1150 flow [2024-06-20 15:14:15,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:15,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:15,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:15,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:14:15,149 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:15,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:15,150 INFO L85 PathProgramCache]: Analyzing trace with hash 762567899, now seen corresponding path program 5 times [2024-06-20 15:14:15,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:15,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370179557] [2024-06-20 15:14:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:15,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370179557] [2024-06-20 15:14:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370179557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997767301] [2024-06-20 15:14:16,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:16,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:16,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 127 transitions, 1150 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:16,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:16,327 INFO L124 PetriNetUnfolderBase]: 378/669 cut-off events. [2024-06-20 15:14:16,328 INFO L125 PetriNetUnfolderBase]: For 40588/40588 co-relation queries the response was YES. [2024-06-20 15:14:16,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4675 conditions, 669 events. 378/669 cut-off events. For 40588/40588 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2885 event pairs, 57 based on Foata normal form. 4/672 useless extension candidates. Maximal degree in co-relation 4600. Up to 612 conditions per place. [2024-06-20 15:14:16,332 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 121 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-20 15:14:16,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 144 transitions, 1668 flow [2024-06-20 15:14:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 15:14:16,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-20 15:14:16,334 INFO L175 Difference]: Start difference. First operand has 152 places, 127 transitions, 1150 flow. Second operand 9 states and 96 transitions. [2024-06-20 15:14:16,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 144 transitions, 1668 flow [2024-06-20 15:14:16,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 144 transitions, 1619 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-20 15:14:16,423 INFO L231 Difference]: Finished difference. Result has 150 places, 132 transitions, 1253 flow [2024-06-20 15:14:16,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1253, PETRI_PLACES=150, PETRI_TRANSITIONS=132} [2024-06-20 15:14:16,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-20 15:14:16,424 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 132 transitions, 1253 flow [2024-06-20 15:14:16,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:14:16,425 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:16,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,425 INFO L85 PathProgramCache]: Analyzing trace with hash 969522738, now seen corresponding path program 3 times [2024-06-20 15:14:16,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916083902] [2024-06-20 15:14:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:17,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:17,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916083902] [2024-06-20 15:14:17,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916083902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:17,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:17,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:17,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407335072] [2024-06-20 15:14:17,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:17,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:17,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 132 transitions, 1253 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:17,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:17,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:18,255 INFO L124 PetriNetUnfolderBase]: 381/676 cut-off events. [2024-06-20 15:14:18,255 INFO L125 PetriNetUnfolderBase]: For 39448/39451 co-relation queries the response was YES. [2024-06-20 15:14:18,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4802 conditions, 676 events. 381/676 cut-off events. For 39448/39451 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2915 event pairs, 71 based on Foata normal form. 1/674 useless extension candidates. Maximal degree in co-relation 4727. Up to 602 conditions per place. [2024-06-20 15:14:18,260 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 117 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-06-20 15:14:18,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 144 transitions, 1595 flow [2024-06-20 15:14:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-20 15:14:18,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32903225806451614 [2024-06-20 15:14:18,261 INFO L175 Difference]: Start difference. First operand has 150 places, 132 transitions, 1253 flow. Second operand 10 states and 102 transitions. [2024-06-20 15:14:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 144 transitions, 1595 flow [2024-06-20 15:14:18,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 144 transitions, 1520 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:18,341 INFO L231 Difference]: Finished difference. Result has 155 places, 134 transitions, 1273 flow [2024-06-20 15:14:18,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1273, PETRI_PLACES=155, PETRI_TRANSITIONS=134} [2024-06-20 15:14:18,341 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-20 15:14:18,341 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 134 transitions, 1273 flow [2024-06-20 15:14:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:14:18,342 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:18,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash 753363689, now seen corresponding path program 6 times [2024-06-20 15:14:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709196137] [2024-06-20 15:14:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709196137] [2024-06-20 15:14:19,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709196137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:19,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072431301] [2024-06-20 15:14:19,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:19,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:19,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:19,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 134 transitions, 1273 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:19,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:19,409 INFO L124 PetriNetUnfolderBase]: 387/686 cut-off events. [2024-06-20 15:14:19,410 INFO L125 PetriNetUnfolderBase]: For 42198/42201 co-relation queries the response was YES. [2024-06-20 15:14:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 686 events. 387/686 cut-off events. For 42198/42201 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2982 event pairs, 58 based on Foata normal form. 2/685 useless extension candidates. Maximal degree in co-relation 4798. Up to 317 conditions per place. [2024-06-20 15:14:19,414 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 87 selfloop transitions, 64 changer transitions 0/153 dead transitions. [2024-06-20 15:14:19,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 153 transitions, 1851 flow [2024-06-20 15:14:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 15:14:19,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-20 15:14:19,416 INFO L175 Difference]: Start difference. First operand has 155 places, 134 transitions, 1273 flow. Second operand 9 states and 106 transitions. [2024-06-20 15:14:19,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 153 transitions, 1851 flow [2024-06-20 15:14:19,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 153 transitions, 1778 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:19,509 INFO L231 Difference]: Finished difference. Result has 157 places, 138 transitions, 1479 flow [2024-06-20 15:14:19,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1479, PETRI_PLACES=157, PETRI_TRANSITIONS=138} [2024-06-20 15:14:19,509 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-20 15:14:19,509 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 138 transitions, 1479 flow [2024-06-20 15:14:19,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:19,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:19,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:14:19,510 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:19,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash -555483923, now seen corresponding path program 7 times [2024-06-20 15:14:19,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:19,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336445849] [2024-06-20 15:14:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:19,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:20,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336445849] [2024-06-20 15:14:20,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336445849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:20,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:20,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:20,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111128784] [2024-06-20 15:14:20,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:20,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:20,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:20,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:20,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 138 transitions, 1479 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:20,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:20,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:20,902 INFO L124 PetriNetUnfolderBase]: 393/696 cut-off events. [2024-06-20 15:14:20,903 INFO L125 PetriNetUnfolderBase]: For 44238/44241 co-relation queries the response was YES. [2024-06-20 15:14:20,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5225 conditions, 696 events. 393/696 cut-off events. For 44238/44241 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3034 event pairs, 64 based on Foata normal form. 2/695 useless extension candidates. Maximal degree in co-relation 5146. Up to 565 conditions per place. [2024-06-20 15:14:20,908 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-20 15:14:20,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 154 transitions, 1896 flow [2024-06-20 15:14:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 15:14:20,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 15:14:20,915 INFO L175 Difference]: Start difference. First operand has 157 places, 138 transitions, 1479 flow. Second operand 9 states and 100 transitions. [2024-06-20 15:14:20,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 154 transitions, 1896 flow [2024-06-20 15:14:21,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 154 transitions, 1791 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:21,005 INFO L231 Difference]: Finished difference. Result has 161 places, 140 transitions, 1514 flow [2024-06-20 15:14:21,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1514, PETRI_PLACES=161, PETRI_TRANSITIONS=140} [2024-06-20 15:14:21,006 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-20 15:14:21,006 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 140 transitions, 1514 flow [2024-06-20 15:14:21,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:21,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:21,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:21,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:14:21,007 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:21,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash -555476483, now seen corresponding path program 8 times [2024-06-20 15:14:21,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:21,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436469210] [2024-06-20 15:14:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:21,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436469210] [2024-06-20 15:14:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436469210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:21,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:21,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981547880] [2024-06-20 15:14:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:21,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:21,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:21,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:22,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:22,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 140 transitions, 1514 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:22,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:22,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:22,295 INFO L124 PetriNetUnfolderBase]: 409/722 cut-off events. [2024-06-20 15:14:22,295 INFO L125 PetriNetUnfolderBase]: For 49353/49356 co-relation queries the response was YES. [2024-06-20 15:14:22,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 722 events. 409/722 cut-off events. For 49353/49356 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3177 event pairs, 64 based on Foata normal form. 2/721 useless extension candidates. Maximal degree in co-relation 5569. Up to 571 conditions per place. [2024-06-20 15:14:22,301 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 39 changer transitions 0/159 dead transitions. [2024-06-20 15:14:22,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 159 transitions, 2120 flow [2024-06-20 15:14:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 15:14:22,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 15:14:22,302 INFO L175 Difference]: Start difference. First operand has 161 places, 140 transitions, 1514 flow. Second operand 9 states and 102 transitions. [2024-06-20 15:14:22,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 159 transitions, 2120 flow [2024-06-20 15:14:22,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 159 transitions, 2001 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:22,395 INFO L231 Difference]: Finished difference. Result has 163 places, 144 transitions, 1612 flow [2024-06-20 15:14:22,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1612, PETRI_PLACES=163, PETRI_TRANSITIONS=144} [2024-06-20 15:14:22,395 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-20 15:14:22,395 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 144 transitions, 1612 flow [2024-06-20 15:14:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:22,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:22,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:14:22,396 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:22,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash -298975694, now seen corresponding path program 4 times [2024-06-20 15:14:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:22,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60178109] [2024-06-20 15:14:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:23,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:23,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60178109] [2024-06-20 15:14:23,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60178109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:23,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:23,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:23,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309935256] [2024-06-20 15:14:23,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:23,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:23,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 144 transitions, 1612 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:23,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:23,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:23,919 INFO L124 PetriNetUnfolderBase]: 412/725 cut-off events. [2024-06-20 15:14:23,919 INFO L125 PetriNetUnfolderBase]: For 49266/49266 co-relation queries the response was YES. [2024-06-20 15:14:23,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5700 conditions, 725 events. 412/725 cut-off events. For 49266/49266 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3182 event pairs, 66 based on Foata normal form. 1/725 useless extension candidates. Maximal degree in co-relation 5618. Up to 684 conditions per place. [2024-06-20 15:14:23,924 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 131 selfloop transitions, 23 changer transitions 0/156 dead transitions. [2024-06-20 15:14:23,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 156 transitions, 1985 flow [2024-06-20 15:14:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-20 15:14:23,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 15:14:23,926 INFO L175 Difference]: Start difference. First operand has 163 places, 144 transitions, 1612 flow. Second operand 10 states and 100 transitions. [2024-06-20 15:14:23,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 156 transitions, 1985 flow [2024-06-20 15:14:24,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 156 transitions, 1882 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:24,017 INFO L231 Difference]: Finished difference. Result has 168 places, 146 transitions, 1607 flow [2024-06-20 15:14:24,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1607, PETRI_PLACES=168, PETRI_TRANSITIONS=146} [2024-06-20 15:14:24,017 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-20 15:14:24,017 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 146 transitions, 1607 flow [2024-06-20 15:14:24,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:24,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:24,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:14:24,018 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:24,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash 753371129, now seen corresponding path program 9 times [2024-06-20 15:14:24,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:24,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866812121] [2024-06-20 15:14:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:24,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:25,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:25,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866812121] [2024-06-20 15:14:25,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866812121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:25,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:25,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286744005] [2024-06-20 15:14:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:25,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:25,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:25,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 146 transitions, 1607 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:25,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:25,483 INFO L124 PetriNetUnfolderBase]: 423/743 cut-off events. [2024-06-20 15:14:25,483 INFO L125 PetriNetUnfolderBase]: For 53791/53791 co-relation queries the response was YES. [2024-06-20 15:14:25,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5915 conditions, 743 events. 423/743 cut-off events. For 53791/53791 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3274 event pairs, 63 based on Foata normal form. 2/744 useless extension candidates. Maximal degree in co-relation 5831. Up to 640 conditions per place. [2024-06-20 15:14:25,489 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 131 selfloop transitions, 31 changer transitions 0/164 dead transitions. [2024-06-20 15:14:25,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 164 transitions, 2210 flow [2024-06-20 15:14:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 15:14:25,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 15:14:25,490 INFO L175 Difference]: Start difference. First operand has 168 places, 146 transitions, 1607 flow. Second operand 9 states and 101 transitions. [2024-06-20 15:14:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 164 transitions, 2210 flow [2024-06-20 15:14:25,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 164 transitions, 2137 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:25,591 INFO L231 Difference]: Finished difference. Result has 170 places, 150 transitions, 1742 flow [2024-06-20 15:14:25,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1742, PETRI_PLACES=170, PETRI_TRANSITIONS=150} [2024-06-20 15:14:25,591 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-20 15:14:25,591 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 150 transitions, 1742 flow [2024-06-20 15:14:25,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:25,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:25,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:14:25,592 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:25,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1400812518, now seen corresponding path program 5 times [2024-06-20 15:14:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415754552] [2024-06-20 15:14:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:26,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:26,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415754552] [2024-06-20 15:14:26,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415754552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:26,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:26,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:26,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96352670] [2024-06-20 15:14:26,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:26,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:26,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:26,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:26,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:26,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:26,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 150 transitions, 1742 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:26,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:26,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:27,207 INFO L124 PetriNetUnfolderBase]: 421/742 cut-off events. [2024-06-20 15:14:27,207 INFO L125 PetriNetUnfolderBase]: For 52996/52999 co-relation queries the response was YES. [2024-06-20 15:14:27,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5930 conditions, 742 events. 421/742 cut-off events. For 52996/52999 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3270 event pairs, 77 based on Foata normal form. 1/740 useless extension candidates. Maximal degree in co-relation 5844. Up to 650 conditions per place. [2024-06-20 15:14:27,212 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 127 selfloop transitions, 33 changer transitions 0/162 dead transitions. [2024-06-20 15:14:27,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 162 transitions, 2106 flow [2024-06-20 15:14:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 15:14:27,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 15:14:27,214 INFO L175 Difference]: Start difference. First operand has 170 places, 150 transitions, 1742 flow. Second operand 10 states and 105 transitions. [2024-06-20 15:14:27,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 162 transitions, 2106 flow [2024-06-20 15:14:27,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 162 transitions, 2016 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:27,312 INFO L231 Difference]: Finished difference. Result has 175 places, 151 transitions, 1741 flow [2024-06-20 15:14:27,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1741, PETRI_PLACES=175, PETRI_TRANSITIONS=151} [2024-06-20 15:14:27,313 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-20 15:14:27,313 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 151 transitions, 1741 flow [2024-06-20 15:14:27,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:27,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:27,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:14:27,314 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:27,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash 350166795, now seen corresponding path program 7 times [2024-06-20 15:14:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:27,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564854675] [2024-06-20 15:14:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:27,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:27,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:27,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564854675] [2024-06-20 15:14:27,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564854675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:27,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204398176] [2024-06-20 15:14:27,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:27,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:28,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:28,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 151 transitions, 1741 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:28,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:28,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:28,278 INFO L124 PetriNetUnfolderBase]: 418/737 cut-off events. [2024-06-20 15:14:28,278 INFO L125 PetriNetUnfolderBase]: For 52108/52111 co-relation queries the response was YES. [2024-06-20 15:14:28,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 737 events. 418/737 cut-off events. For 52108/52111 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3239 event pairs, 68 based on Foata normal form. 2/736 useless extension candidates. Maximal degree in co-relation 5694. Up to 625 conditions per place. [2024-06-20 15:14:28,283 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 132 selfloop transitions, 28 changer transitions 0/162 dead transitions. [2024-06-20 15:14:28,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 162 transitions, 2093 flow [2024-06-20 15:14:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-20 15:14:28,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-20 15:14:28,284 INFO L175 Difference]: Start difference. First operand has 175 places, 151 transitions, 1741 flow. Second operand 8 states and 87 transitions. [2024-06-20 15:14:28,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 162 transitions, 2093 flow [2024-06-20 15:14:28,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 162 transitions, 1996 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:28,387 INFO L231 Difference]: Finished difference. Result has 175 places, 151 transitions, 1704 flow [2024-06-20 15:14:28,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1704, PETRI_PLACES=175, PETRI_TRANSITIONS=151} [2024-06-20 15:14:28,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-20 15:14:28,388 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 151 transitions, 1704 flow [2024-06-20 15:14:28,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:28,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:28,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:14:28,389 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:28,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash -555685733, now seen corresponding path program 10 times [2024-06-20 15:14:28,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:28,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266235236] [2024-06-20 15:14:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:29,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:29,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266235236] [2024-06-20 15:14:29,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266235236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:29,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:29,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:29,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736664856] [2024-06-20 15:14:29,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:29,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:29,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:29,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:29,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:29,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:29,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 151 transitions, 1704 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:29,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:29,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:29,886 INFO L124 PetriNetUnfolderBase]: 414/731 cut-off events. [2024-06-20 15:14:29,887 INFO L125 PetriNetUnfolderBase]: For 49931/49934 co-relation queries the response was YES. [2024-06-20 15:14:29,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 731 events. 414/731 cut-off events. For 49931/49934 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3240 event pairs, 77 based on Foata normal form. 2/730 useless extension candidates. Maximal degree in co-relation 5512. Up to 330 conditions per place. [2024-06-20 15:14:29,892 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 96 selfloop transitions, 68 changer transitions 0/166 dead transitions. [2024-06-20 15:14:29,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 166 transitions, 2230 flow [2024-06-20 15:14:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-20 15:14:29,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-20 15:14:29,893 INFO L175 Difference]: Start difference. First operand has 175 places, 151 transitions, 1704 flow. Second operand 9 states and 107 transitions. [2024-06-20 15:14:29,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 166 transitions, 2230 flow [2024-06-20 15:14:30,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 166 transitions, 2081 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:30,009 INFO L231 Difference]: Finished difference. Result has 177 places, 151 transitions, 1696 flow [2024-06-20 15:14:30,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1696, PETRI_PLACES=177, PETRI_TRANSITIONS=151} [2024-06-20 15:14:30,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-20 15:14:30,010 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 151 transitions, 1696 flow [2024-06-20 15:14:30,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:30,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:30,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:14:30,011 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:30,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash -438307596, now seen corresponding path program 1 times [2024-06-20 15:14:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:30,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956114118] [2024-06-20 15:14:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:30,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956114118] [2024-06-20 15:14:30,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956114118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:30,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564278089] [2024-06-20 15:14:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:30,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:30,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:30,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 151 transitions, 1696 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:30,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:31,250 INFO L124 PetriNetUnfolderBase]: 466/829 cut-off events. [2024-06-20 15:14:31,251 INFO L125 PetriNetUnfolderBase]: For 51319/51319 co-relation queries the response was YES. [2024-06-20 15:14:31,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6017 conditions, 829 events. 466/829 cut-off events. For 51319/51319 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3827 event pairs, 73 based on Foata normal form. 2/830 useless extension candidates. Maximal degree in co-relation 5927. Up to 691 conditions per place. [2024-06-20 15:14:31,257 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 162 selfloop transitions, 25 changer transitions 0/189 dead transitions. [2024-06-20 15:14:31,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 189 transitions, 2282 flow [2024-06-20 15:14:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 15:14:31,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 15:14:31,258 INFO L175 Difference]: Start difference. First operand has 177 places, 151 transitions, 1696 flow. Second operand 10 states and 108 transitions. [2024-06-20 15:14:31,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 189 transitions, 2282 flow [2024-06-20 15:14:31,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 189 transitions, 2154 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:31,379 INFO L231 Difference]: Finished difference. Result has 183 places, 164 transitions, 1769 flow [2024-06-20 15:14:31,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1769, PETRI_PLACES=183, PETRI_TRANSITIONS=164} [2024-06-20 15:14:31,379 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-20 15:14:31,379 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 164 transitions, 1769 flow [2024-06-20 15:14:31,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:31,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:31,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:14:31,380 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:31,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1759355624, now seen corresponding path program 2 times [2024-06-20 15:14:31,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:31,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19317022] [2024-06-20 15:14:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:31,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19317022] [2024-06-20 15:14:32,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19317022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:32,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717224825] [2024-06-20 15:14:32,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:32,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:32,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:32,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 164 transitions, 1769 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:32,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:32,442 INFO L124 PetriNetUnfolderBase]: 470/837 cut-off events. [2024-06-20 15:14:32,442 INFO L125 PetriNetUnfolderBase]: For 52808/52808 co-relation queries the response was YES. [2024-06-20 15:14:32,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6008 conditions, 837 events. 470/837 cut-off events. For 52808/52808 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3881 event pairs, 54 based on Foata normal form. 2/838 useless extension candidates. Maximal degree in co-relation 5914. Up to 645 conditions per place. [2024-06-20 15:14:32,451 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 148 selfloop transitions, 30 changer transitions 0/180 dead transitions. [2024-06-20 15:14:32,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 180 transitions, 2179 flow [2024-06-20 15:14:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-20 15:14:32,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-20 15:14:32,459 INFO L175 Difference]: Start difference. First operand has 183 places, 164 transitions, 1769 flow. Second operand 9 states and 93 transitions. [2024-06-20 15:14:32,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 180 transitions, 2179 flow [2024-06-20 15:14:32,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 180 transitions, 2143 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:32,591 INFO L231 Difference]: Finished difference. Result has 189 places, 165 transitions, 1819 flow [2024-06-20 15:14:32,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1819, PETRI_PLACES=189, PETRI_TRANSITIONS=165} [2024-06-20 15:14:32,592 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-20 15:14:32,592 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 165 transitions, 1819 flow [2024-06-20 15:14:32,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:32,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:14:32,593 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:32,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash 505996242, now seen corresponding path program 1 times [2024-06-20 15:14:32,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559992365] [2024-06-20 15:14:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:32,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:33,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:33,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559992365] [2024-06-20 15:14:33,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559992365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:33,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:33,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:33,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145158793] [2024-06-20 15:14:33,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:33,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:33,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:33,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:33,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 165 transitions, 1819 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:33,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:33,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:33,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:34,000 INFO L124 PetriNetUnfolderBase]: 468/834 cut-off events. [2024-06-20 15:14:34,000 INFO L125 PetriNetUnfolderBase]: For 50577/50577 co-relation queries the response was YES. [2024-06-20 15:14:34,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5972 conditions, 834 events. 468/834 cut-off events. For 50577/50577 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3858 event pairs, 75 based on Foata normal form. 1/834 useless extension candidates. Maximal degree in co-relation 5877. Up to 696 conditions per place. [2024-06-20 15:14:34,006 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 142 selfloop transitions, 37 changer transitions 0/181 dead transitions. [2024-06-20 15:14:34,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 181 transitions, 2284 flow [2024-06-20 15:14:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 15:14:34,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 15:14:34,009 INFO L175 Difference]: Start difference. First operand has 189 places, 165 transitions, 1819 flow. Second operand 9 states and 102 transitions. [2024-06-20 15:14:34,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 181 transitions, 2284 flow [2024-06-20 15:14:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 181 transitions, 2210 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:34,129 INFO L231 Difference]: Finished difference. Result has 191 places, 167 transitions, 1893 flow [2024-06-20 15:14:34,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1893, PETRI_PLACES=191, PETRI_TRANSITIONS=167} [2024-06-20 15:14:34,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-20 15:14:34,130 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 167 transitions, 1893 flow [2024-06-20 15:14:34,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:34,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:34,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:14:34,131 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:34,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash 875360416, now seen corresponding path program 3 times [2024-06-20 15:14:34,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:34,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337448004] [2024-06-20 15:14:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:34,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:34,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337448004] [2024-06-20 15:14:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337448004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:34,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:34,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872580290] [2024-06-20 15:14:34,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:34,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:34,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 167 transitions, 1893 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:34,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:34,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:35,237 INFO L124 PetriNetUnfolderBase]: 472/842 cut-off events. [2024-06-20 15:14:35,238 INFO L125 PetriNetUnfolderBase]: For 53155/53155 co-relation queries the response was YES. [2024-06-20 15:14:35,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6031 conditions, 842 events. 472/842 cut-off events. For 53155/53155 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3932 event pairs, 77 based on Foata normal form. 2/843 useless extension candidates. Maximal degree in co-relation 5935. Up to 718 conditions per place. [2024-06-20 15:14:35,244 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 154 selfloop transitions, 26 changer transitions 0/182 dead transitions. [2024-06-20 15:14:35,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 182 transitions, 2305 flow [2024-06-20 15:14:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 15:14:35,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-20 15:14:35,246 INFO L175 Difference]: Start difference. First operand has 191 places, 167 transitions, 1893 flow. Second operand 9 states and 96 transitions. [2024-06-20 15:14:35,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 182 transitions, 2305 flow [2024-06-20 15:14:35,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 182 transitions, 2192 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:35,364 INFO L231 Difference]: Finished difference. Result has 193 places, 168 transitions, 1856 flow [2024-06-20 15:14:35,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1856, PETRI_PLACES=193, PETRI_TRANSITIONS=168} [2024-06-20 15:14:35,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-20 15:14:35,365 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 168 transitions, 1856 flow [2024-06-20 15:14:35,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:35,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:35,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:35,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:14:35,366 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:35,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1849770328, now seen corresponding path program 4 times [2024-06-20 15:14:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:35,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291921048] [2024-06-20 15:14:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:35,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291921048] [2024-06-20 15:14:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291921048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:36,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:36,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026841624] [2024-06-20 15:14:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:36,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:36,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:36,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 168 transitions, 1856 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:36,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:36,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:36,572 INFO L124 PetriNetUnfolderBase]: 476/850 cut-off events. [2024-06-20 15:14:36,572 INFO L125 PetriNetUnfolderBase]: For 55282/55282 co-relation queries the response was YES. [2024-06-20 15:14:36,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 850 events. 476/850 cut-off events. For 55282/55282 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3988 event pairs, 77 based on Foata normal form. 2/851 useless extension candidates. Maximal degree in co-relation 5957. Up to 718 conditions per place. [2024-06-20 15:14:36,579 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 148 selfloop transitions, 33 changer transitions 0/183 dead transitions. [2024-06-20 15:14:36,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 183 transitions, 2280 flow [2024-06-20 15:14:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 15:14:36,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 15:14:36,581 INFO L175 Difference]: Start difference. First operand has 193 places, 168 transitions, 1856 flow. Second operand 9 states and 100 transitions. [2024-06-20 15:14:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 183 transitions, 2280 flow [2024-06-20 15:14:36,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 183 transitions, 2214 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:36,724 INFO L231 Difference]: Finished difference. Result has 195 places, 169 transitions, 1883 flow [2024-06-20 15:14:36,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1883, PETRI_PLACES=195, PETRI_TRANSITIONS=169} [2024-06-20 15:14:36,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-20 15:14:36,725 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 169 transitions, 1883 flow [2024-06-20 15:14:36,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:36,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:36,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:14:36,725 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:36,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1849765678, now seen corresponding path program 5 times [2024-06-20 15:14:36,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:36,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250920866] [2024-06-20 15:14:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:37,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:37,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250920866] [2024-06-20 15:14:37,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250920866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:37,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:37,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971972533] [2024-06-20 15:14:37,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:37,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:37,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:37,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 169 transitions, 1883 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:37,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:37,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:37,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:37,937 INFO L124 PetriNetUnfolderBase]: 480/858 cut-off events. [2024-06-20 15:14:37,937 INFO L125 PetriNetUnfolderBase]: For 56810/56810 co-relation queries the response was YES. [2024-06-20 15:14:37,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6133 conditions, 858 events. 480/858 cut-off events. For 56810/56810 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4038 event pairs, 77 based on Foata normal form. 2/859 useless extension candidates. Maximal degree in co-relation 6035. Up to 732 conditions per place. [2024-06-20 15:14:37,943 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 153 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2024-06-20 15:14:37,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 184 transitions, 2307 flow [2024-06-20 15:14:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 15:14:37,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-20 15:14:37,944 INFO L175 Difference]: Start difference. First operand has 195 places, 169 transitions, 1883 flow. Second operand 9 states and 98 transitions. [2024-06-20 15:14:37,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 184 transitions, 2307 flow [2024-06-20 15:14:38,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 184 transitions, 2226 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:38,087 INFO L231 Difference]: Finished difference. Result has 197 places, 170 transitions, 1888 flow [2024-06-20 15:14:38,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1888, PETRI_PLACES=197, PETRI_TRANSITIONS=170} [2024-06-20 15:14:38,088 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-20 15:14:38,088 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 170 transitions, 1888 flow [2024-06-20 15:14:38,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:38,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:38,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:14:38,089 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:38,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:38,089 INFO L85 PathProgramCache]: Analyzing trace with hash -632206154, now seen corresponding path program 6 times [2024-06-20 15:14:38,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:38,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029977988] [2024-06-20 15:14:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:38,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:39,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:39,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029977988] [2024-06-20 15:14:39,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029977988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:39,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:39,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:39,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648059509] [2024-06-20 15:14:39,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:39,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:39,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:39,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:39,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:39,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:39,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 170 transitions, 1888 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:39,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:39,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:39,526 INFO L124 PetriNetUnfolderBase]: 484/864 cut-off events. [2024-06-20 15:14:39,526 INFO L125 PetriNetUnfolderBase]: For 58611/58613 co-relation queries the response was YES. [2024-06-20 15:14:39,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6184 conditions, 864 events. 484/864 cut-off events. For 58611/58613 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4095 event pairs, 52 based on Foata normal form. 4/867 useless extension candidates. Maximal degree in co-relation 6085. Up to 714 conditions per place. [2024-06-20 15:14:39,532 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 157 selfloop transitions, 29 changer transitions 0/188 dead transitions. [2024-06-20 15:14:39,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 188 transitions, 2329 flow [2024-06-20 15:14:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 15:14:39,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:14:39,533 INFO L175 Difference]: Start difference. First operand has 197 places, 170 transitions, 1888 flow. Second operand 9 states and 99 transitions. [2024-06-20 15:14:39,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 188 transitions, 2329 flow [2024-06-20 15:14:39,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 188 transitions, 2253 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:39,684 INFO L231 Difference]: Finished difference. Result has 199 places, 171 transitions, 1900 flow [2024-06-20 15:14:39,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1900, PETRI_PLACES=199, PETRI_TRANSITIONS=171} [2024-06-20 15:14:39,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-20 15:14:39,684 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 171 transitions, 1900 flow [2024-06-20 15:14:39,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:39,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:39,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:14:39,685 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:39,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -632086184, now seen corresponding path program 7 times [2024-06-20 15:14:39,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:39,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745459170] [2024-06-20 15:14:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:39,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745459170] [2024-06-20 15:14:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745459170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:40,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:40,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:40,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852167834] [2024-06-20 15:14:40,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:40,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:40,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:40,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 171 transitions, 1900 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:40,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:40,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:40,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:41,032 INFO L124 PetriNetUnfolderBase]: 488/872 cut-off events. [2024-06-20 15:14:41,032 INFO L125 PetriNetUnfolderBase]: For 60434/60436 co-relation queries the response was YES. [2024-06-20 15:14:41,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6255 conditions, 872 events. 488/872 cut-off events. For 60434/60436 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4157 event pairs, 78 based on Foata normal form. 4/875 useless extension candidates. Maximal degree in co-relation 6155. Up to 750 conditions per place. [2024-06-20 15:14:41,040 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 155 selfloop transitions, 32 changer transitions 0/189 dead transitions. [2024-06-20 15:14:41,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 189 transitions, 2353 flow [2024-06-20 15:14:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 15:14:41,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 15:14:41,041 INFO L175 Difference]: Start difference. First operand has 199 places, 171 transitions, 1900 flow. Second operand 9 states and 101 transitions. [2024-06-20 15:14:41,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 189 transitions, 2353 flow [2024-06-20 15:14:41,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 189 transitions, 2275 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:41,187 INFO L231 Difference]: Finished difference. Result has 201 places, 172 transitions, 1919 flow [2024-06-20 15:14:41,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1919, PETRI_PLACES=201, PETRI_TRANSITIONS=172} [2024-06-20 15:14:41,187 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-20 15:14:41,188 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 172 transitions, 1919 flow [2024-06-20 15:14:41,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:41,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:41,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:41,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:14:41,188 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:41,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash 111967766, now seen corresponding path program 2 times [2024-06-20 15:14:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:41,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759407488] [2024-06-20 15:14:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:41,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:42,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759407488] [2024-06-20 15:14:42,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759407488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:42,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:42,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:42,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597806471] [2024-06-20 15:14:42,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:42,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:42,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:42,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:42,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 172 transitions, 1919 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:42,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:42,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:42,767 INFO L124 PetriNetUnfolderBase]: 486/869 cut-off events. [2024-06-20 15:14:42,768 INFO L125 PetriNetUnfolderBase]: For 57396/57398 co-relation queries the response was YES. [2024-06-20 15:14:42,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6140 conditions, 869 events. 486/869 cut-off events. For 57396/57398 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4117 event pairs, 77 based on Foata normal form. 3/871 useless extension candidates. Maximal degree in co-relation 6039. Up to 744 conditions per place. [2024-06-20 15:14:42,774 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 154 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-20 15:14:42,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 191 transitions, 2430 flow [2024-06-20 15:14:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 15:14:42,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 15:14:42,775 INFO L175 Difference]: Start difference. First operand has 201 places, 172 transitions, 1919 flow. Second operand 9 states and 102 transitions. [2024-06-20 15:14:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 191 transitions, 2430 flow [2024-06-20 15:14:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 191 transitions, 2345 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:42,931 INFO L231 Difference]: Finished difference. Result has 203 places, 174 transitions, 1992 flow [2024-06-20 15:14:42,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1992, PETRI_PLACES=203, PETRI_TRANSITIONS=174} [2024-06-20 15:14:42,932 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-20 15:14:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 174 transitions, 1992 flow [2024-06-20 15:14:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:42,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:42,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:14:42,933 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:42,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1409165784, now seen corresponding path program 8 times [2024-06-20 15:14:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:42,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401710850] [2024-06-20 15:14:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:43,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:43,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401710850] [2024-06-20 15:14:43,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401710850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:43,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:43,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500539014] [2024-06-20 15:14:43,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:43,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:43,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:43,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:43,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:43,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 174 transitions, 1992 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:43,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:43,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:43,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:44,033 INFO L124 PetriNetUnfolderBase]: 490/877 cut-off events. [2024-06-20 15:14:44,033 INFO L125 PetriNetUnfolderBase]: For 61387/61389 co-relation queries the response was YES. [2024-06-20 15:14:44,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6213 conditions, 877 events. 490/877 cut-off events. For 61387/61389 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4193 event pairs, 77 based on Foata normal form. 4/880 useless extension candidates. Maximal degree in co-relation 6111. Up to 758 conditions per place. [2024-06-20 15:14:44,040 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 161 selfloop transitions, 29 changer transitions 0/192 dead transitions. [2024-06-20 15:14:44,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 192 transitions, 2449 flow [2024-06-20 15:14:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 15:14:44,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 15:14:44,041 INFO L175 Difference]: Start difference. First operand has 203 places, 174 transitions, 1992 flow. Second operand 9 states and 100 transitions. [2024-06-20 15:14:44,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 192 transitions, 2449 flow [2024-06-20 15:14:44,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 192 transitions, 2321 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:44,180 INFO L231 Difference]: Finished difference. Result has 205 places, 175 transitions, 1956 flow [2024-06-20 15:14:44,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1956, PETRI_PLACES=205, PETRI_TRANSITIONS=175} [2024-06-20 15:14:44,182 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2024-06-20 15:14:44,182 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 175 transitions, 1956 flow [2024-06-20 15:14:44,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:44,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:44,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:44,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:14:44,183 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:44,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash 116616154, now seen corresponding path program 1 times [2024-06-20 15:14:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:44,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218203879] [2024-06-20 15:14:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218203879] [2024-06-20 15:14:45,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218203879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:45,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:45,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:45,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687318025] [2024-06-20 15:14:45,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:45,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:45,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 175 transitions, 1956 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:45,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:45,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:45,713 INFO L124 PetriNetUnfolderBase]: 496/889 cut-off events. [2024-06-20 15:14:45,714 INFO L125 PetriNetUnfolderBase]: For 64057/64059 co-relation queries the response was YES. [2024-06-20 15:14:45,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 889 events. 496/889 cut-off events. For 64057/64059 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4271 event pairs, 82 based on Foata normal form. 4/890 useless extension candidates. Maximal degree in co-relation 6166. Up to 765 conditions per place. [2024-06-20 15:14:45,721 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 163 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-20 15:14:45,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 197 transitions, 2474 flow [2024-06-20 15:14:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 15:14:45,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:14:45,722 INFO L175 Difference]: Start difference. First operand has 205 places, 175 transitions, 1956 flow. Second operand 10 states and 110 transitions. [2024-06-20 15:14:45,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 197 transitions, 2474 flow [2024-06-20 15:14:45,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 197 transitions, 2392 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:45,874 INFO L231 Difference]: Finished difference. Result has 208 places, 177 transitions, 2005 flow [2024-06-20 15:14:45,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2005, PETRI_PLACES=208, PETRI_TRANSITIONS=177} [2024-06-20 15:14:45,875 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-20 15:14:45,875 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 177 transitions, 2005 flow [2024-06-20 15:14:45,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:45,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:45,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:14:45,876 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:45,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash 282670010, now seen corresponding path program 9 times [2024-06-20 15:14:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:45,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219657304] [2024-06-20 15:14:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:45,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:46,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:46,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219657304] [2024-06-20 15:14:46,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219657304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:46,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:46,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:46,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072707203] [2024-06-20 15:14:46,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:46,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:46,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:46,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:46,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:46,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 177 transitions, 2005 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:46,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:46,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:46,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:47,034 INFO L124 PetriNetUnfolderBase]: 500/898 cut-off events. [2024-06-20 15:14:47,034 INFO L125 PetriNetUnfolderBase]: For 65993/65993 co-relation queries the response was YES. [2024-06-20 15:14:47,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6351 conditions, 898 events. 500/898 cut-off events. For 65993/65993 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4326 event pairs, 78 based on Foata normal form. 2/897 useless extension candidates. Maximal degree in co-relation 6247. Up to 759 conditions per place. [2024-06-20 15:14:47,042 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 160 selfloop transitions, 32 changer transitions 0/194 dead transitions. [2024-06-20 15:14:47,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 194 transitions, 2472 flow [2024-06-20 15:14:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 15:14:47,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-20 15:14:47,043 INFO L175 Difference]: Start difference. First operand has 208 places, 177 transitions, 2005 flow. Second operand 9 states and 98 transitions. [2024-06-20 15:14:47,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 194 transitions, 2472 flow [2024-06-20 15:14:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 194 transitions, 2365 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:47,212 INFO L231 Difference]: Finished difference. Result has 209 places, 178 transitions, 1998 flow [2024-06-20 15:14:47,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1998, PETRI_PLACES=209, PETRI_TRANSITIONS=178} [2024-06-20 15:14:47,212 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-20 15:14:47,213 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 178 transitions, 1998 flow [2024-06-20 15:14:47,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:47,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:47,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:47,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:14:47,213 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:47,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash 282849934, now seen corresponding path program 2 times [2024-06-20 15:14:47,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:47,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431809829] [2024-06-20 15:14:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:47,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:48,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431809829] [2024-06-20 15:14:48,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431809829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:48,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:48,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:48,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636491011] [2024-06-20 15:14:48,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:48,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:48,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:48,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:48,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 178 transitions, 1998 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:48,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:48,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:48,832 INFO L124 PetriNetUnfolderBase]: 506/908 cut-off events. [2024-06-20 15:14:48,833 INFO L125 PetriNetUnfolderBase]: For 67981/67981 co-relation queries the response was YES. [2024-06-20 15:14:48,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6425 conditions, 908 events. 506/908 cut-off events. For 67981/67981 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4387 event pairs, 76 based on Foata normal form. 2/907 useless extension candidates. Maximal degree in co-relation 6320. Up to 759 conditions per place. [2024-06-20 15:14:48,842 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 160 selfloop transitions, 34 changer transitions 0/196 dead transitions. [2024-06-20 15:14:48,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 196 transitions, 2505 flow [2024-06-20 15:14:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 15:14:48,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 15:14:48,844 INFO L175 Difference]: Start difference. First operand has 209 places, 178 transitions, 1998 flow. Second operand 9 states and 100 transitions. [2024-06-20 15:14:48,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 196 transitions, 2505 flow [2024-06-20 15:14:49,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 196 transitions, 2415 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:49,022 INFO L231 Difference]: Finished difference. Result has 211 places, 180 transitions, 2048 flow [2024-06-20 15:14:49,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2048, PETRI_PLACES=211, PETRI_TRANSITIONS=180} [2024-06-20 15:14:49,023 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-20 15:14:49,023 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 180 transitions, 2048 flow [2024-06-20 15:14:49,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:49,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:49,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:49,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:14:49,024 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:49,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash 289345054, now seen corresponding path program 3 times [2024-06-20 15:14:49,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:49,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005820513] [2024-06-20 15:14:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:49,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:50,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005820513] [2024-06-20 15:14:50,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005820513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:50,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:50,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:50,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068112667] [2024-06-20 15:14:50,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:50,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:50,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:50,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:50,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 180 transitions, 2048 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:50,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:50,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:51,041 INFO L124 PetriNetUnfolderBase]: 522/934 cut-off events. [2024-06-20 15:14:51,041 INFO L125 PetriNetUnfolderBase]: For 76172/76172 co-relation queries the response was YES. [2024-06-20 15:14:51,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6819 conditions, 934 events. 522/934 cut-off events. For 76172/76172 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4528 event pairs, 74 based on Foata normal form. 2/933 useless extension candidates. Maximal degree in co-relation 6713. Up to 672 conditions per place. [2024-06-20 15:14:51,049 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 141 selfloop transitions, 62 changer transitions 0/205 dead transitions. [2024-06-20 15:14:51,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 205 transitions, 2807 flow [2024-06-20 15:14:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-20 15:14:51,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:14:51,050 INFO L175 Difference]: Start difference. First operand has 211 places, 180 transitions, 2048 flow. Second operand 11 states and 121 transitions. [2024-06-20 15:14:51,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 205 transitions, 2807 flow [2024-06-20 15:14:51,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 205 transitions, 2695 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:51,233 INFO L231 Difference]: Finished difference. Result has 215 places, 184 transitions, 2203 flow [2024-06-20 15:14:51,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2203, PETRI_PLACES=215, PETRI_TRANSITIONS=184} [2024-06-20 15:14:51,234 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-20 15:14:51,234 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 184 transitions, 2203 flow [2024-06-20 15:14:51,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:51,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:51,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:14:51,234 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:51,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1231783350, now seen corresponding path program 1 times [2024-06-20 15:14:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:51,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919416351] [2024-06-20 15:14:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:51,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:52,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:52,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919416351] [2024-06-20 15:14:52,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919416351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:52,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:52,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:14:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605746771] [2024-06-20 15:14:52,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:52,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:14:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:52,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:14:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:14:52,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:52,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 184 transitions, 2203 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:52,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:52,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:52,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:53,365 INFO L124 PetriNetUnfolderBase]: 546/986 cut-off events. [2024-06-20 15:14:53,366 INFO L125 PetriNetUnfolderBase]: For 110193/110193 co-relation queries the response was YES. [2024-06-20 15:14:53,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7199 conditions, 986 events. 546/986 cut-off events. For 110193/110193 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4881 event pairs, 97 based on Foata normal form. 14/997 useless extension candidates. Maximal degree in co-relation 7092. Up to 789 conditions per place. [2024-06-20 15:14:53,374 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 164 selfloop transitions, 34 changer transitions 9/209 dead transitions. [2024-06-20 15:14:53,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 209 transitions, 2792 flow [2024-06-20 15:14:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-20 15:14:53,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 15:14:53,375 INFO L175 Difference]: Start difference. First operand has 215 places, 184 transitions, 2203 flow. Second operand 11 states and 124 transitions. [2024-06-20 15:14:53,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 209 transitions, 2792 flow [2024-06-20 15:14:53,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 209 transitions, 2654 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:53,575 INFO L231 Difference]: Finished difference. Result has 219 places, 183 transitions, 2136 flow [2024-06-20 15:14:53,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2136, PETRI_PLACES=219, PETRI_TRANSITIONS=183} [2024-06-20 15:14:53,575 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-20 15:14:53,575 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 183 transitions, 2136 flow [2024-06-20 15:14:53,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:53,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:53,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:14:53,576 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:53,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash 282665360, now seen corresponding path program 10 times [2024-06-20 15:14:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:53,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133048017] [2024-06-20 15:14:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:54,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:54,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133048017] [2024-06-20 15:14:54,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133048017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:54,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:54,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:54,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501087323] [2024-06-20 15:14:54,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:54,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:54,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:54,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:54,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 183 transitions, 2136 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:54,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:54,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:54,866 INFO L124 PetriNetUnfolderBase]: 538/974 cut-off events. [2024-06-20 15:14:54,867 INFO L125 PetriNetUnfolderBase]: For 79818/79818 co-relation queries the response was YES. [2024-06-20 15:14:54,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7104 conditions, 974 events. 538/974 cut-off events. For 79818/79818 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4845 event pairs, 85 based on Foata normal form. 2/973 useless extension candidates. Maximal degree in co-relation 6995. Up to 835 conditions per place. [2024-06-20 15:14:54,874 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 167 selfloop transitions, 31 changer transitions 0/200 dead transitions. [2024-06-20 15:14:54,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 200 transitions, 2613 flow [2024-06-20 15:14:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 15:14:54,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-20 15:14:54,875 INFO L175 Difference]: Start difference. First operand has 219 places, 183 transitions, 2136 flow. Second operand 9 states and 97 transitions. [2024-06-20 15:14:54,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 200 transitions, 2613 flow [2024-06-20 15:14:55,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 200 transitions, 2531 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:55,101 INFO L231 Difference]: Finished difference. Result has 219 places, 184 transitions, 2154 flow [2024-06-20 15:14:55,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2154, PETRI_PLACES=219, PETRI_TRANSITIONS=184} [2024-06-20 15:14:55,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-20 15:14:55,102 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 184 transitions, 2154 flow [2024-06-20 15:14:55,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:55,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:55,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:14:55,103 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:55,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:55,103 INFO L85 PathProgramCache]: Analyzing trace with hash 289099100, now seen corresponding path program 11 times [2024-06-20 15:14:55,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:55,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210617850] [2024-06-20 15:14:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:55,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:55,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210617850] [2024-06-20 15:14:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210617850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:55,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:55,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:14:55,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005545116] [2024-06-20 15:14:55,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:14:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:14:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:14:56,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:56,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 184 transitions, 2154 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:56,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:56,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:56,378 INFO L124 PetriNetUnfolderBase]: 542/982 cut-off events. [2024-06-20 15:14:56,378 INFO L125 PetriNetUnfolderBase]: For 81758/81758 co-relation queries the response was YES. [2024-06-20 15:14:56,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7176 conditions, 982 events. 542/982 cut-off events. For 81758/81758 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4876 event pairs, 85 based on Foata normal form. 2/981 useless extension candidates. Maximal degree in co-relation 7066. Up to 813 conditions per place. [2024-06-20 15:14:56,385 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 160 selfloop transitions, 39 changer transitions 0/201 dead transitions. [2024-06-20 15:14:56,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 201 transitions, 2639 flow [2024-06-20 15:14:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 15:14:56,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:14:56,386 INFO L175 Difference]: Start difference. First operand has 219 places, 184 transitions, 2154 flow. Second operand 9 states and 99 transitions. [2024-06-20 15:14:56,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 201 transitions, 2639 flow [2024-06-20 15:14:56,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 201 transitions, 2549 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:56,658 INFO L231 Difference]: Finished difference. Result has 221 places, 185 transitions, 2182 flow [2024-06-20 15:14:56,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2182, PETRI_PLACES=221, PETRI_TRANSITIONS=185} [2024-06-20 15:14:56,659 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-20 15:14:56,659 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 185 transitions, 2182 flow [2024-06-20 15:14:56,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:56,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:56,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:14:56,659 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:56,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:56,660 INFO L85 PathProgramCache]: Analyzing trace with hash 289106044, now seen corresponding path program 4 times [2024-06-20 15:14:56,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:56,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795240482] [2024-06-20 15:14:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:56,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795240482] [2024-06-20 15:14:57,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795240482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:57,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:57,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:14:57,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496456769] [2024-06-20 15:14:57,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:57,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:14:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:14:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:14:57,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:14:57,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 185 transitions, 2182 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:57,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:14:57,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:58,219 INFO L124 PetriNetUnfolderBase]: 538/976 cut-off events. [2024-06-20 15:14:58,219 INFO L125 PetriNetUnfolderBase]: For 78048/78048 co-relation queries the response was YES. [2024-06-20 15:14:58,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 976 events. 538/976 cut-off events. For 78048/78048 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4853 event pairs, 80 based on Foata normal form. 2/975 useless extension candidates. Maximal degree in co-relation 6869. Up to 759 conditions per place. [2024-06-20 15:14:58,228 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 48 changer transitions 0/203 dead transitions. [2024-06-20 15:14:58,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 203 transitions, 2649 flow [2024-06-20 15:14:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 15:14:58,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-20 15:14:58,229 INFO L175 Difference]: Start difference. First operand has 221 places, 185 transitions, 2182 flow. Second operand 10 states and 111 transitions. [2024-06-20 15:14:58,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 203 transitions, 2649 flow [2024-06-20 15:14:58,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 203 transitions, 2511 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:58,492 INFO L231 Difference]: Finished difference. Result has 224 places, 185 transitions, 2145 flow [2024-06-20 15:14:58,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2145, PETRI_PLACES=224, PETRI_TRANSITIONS=185} [2024-06-20 15:14:58,493 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-20 15:14:58,493 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 185 transitions, 2145 flow [2024-06-20 15:14:58,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:58,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:58,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:14:58,493 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:14:58,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -9564558, now seen corresponding path program 2 times [2024-06-20 15:14:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:58,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102364786] [2024-06-20 15:14:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:59,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102364786] [2024-06-20 15:14:59,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102364786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:59,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:59,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:14:59,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739173451] [2024-06-20 15:14:59,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:59,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:14:59,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:14:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:00,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:00,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 185 transitions, 2145 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:00,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:00,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:00,343 INFO L124 PetriNetUnfolderBase]: 542/984 cut-off events. [2024-06-20 15:15:00,351 INFO L125 PetriNetUnfolderBase]: For 79534/79540 co-relation queries the response was YES. [2024-06-20 15:15:00,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7004 conditions, 984 events. 542/984 cut-off events. For 79534/79540 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4877 event pairs, 112 based on Foata normal form. 2/981 useless extension candidates. Maximal degree in co-relation 6892. Up to 873 conditions per place. [2024-06-20 15:15:00,359 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 164 selfloop transitions, 32 changer transitions 0/198 dead transitions. [2024-06-20 15:15:00,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 198 transitions, 2591 flow [2024-06-20 15:15:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-20 15:15:00,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 15:15:00,369 INFO L175 Difference]: Start difference. First operand has 224 places, 185 transitions, 2145 flow. Second operand 11 states and 110 transitions. [2024-06-20 15:15:00,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 198 transitions, 2591 flow [2024-06-20 15:15:00,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 198 transitions, 2486 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:00,655 INFO L231 Difference]: Finished difference. Result has 227 places, 186 transitions, 2136 flow [2024-06-20 15:15:00,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2136, PETRI_PLACES=227, PETRI_TRANSITIONS=186} [2024-06-20 15:15:00,656 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-20 15:15:00,656 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 186 transitions, 2136 flow [2024-06-20 15:15:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:00,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:00,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:15:00,657 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:00,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:00,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1777115974, now seen corresponding path program 12 times [2024-06-20 15:15:00,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:00,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546417008] [2024-06-20 15:15:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:00,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:01,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:01,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546417008] [2024-06-20 15:15:01,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546417008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:01,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:01,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:15:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853197642] [2024-06-20 15:15:01,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:01,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:15:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:15:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:15:01,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:01,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 186 transitions, 2136 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:01,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:01,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:01,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:02,222 INFO L124 PetriNetUnfolderBase]: 546/992 cut-off events. [2024-06-20 15:15:02,222 INFO L125 PetriNetUnfolderBase]: For 81960/81966 co-relation queries the response was YES. [2024-06-20 15:15:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7047 conditions, 992 events. 546/992 cut-off events. For 81960/81966 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4970 event pairs, 89 based on Foata normal form. 2/989 useless extension candidates. Maximal degree in co-relation 6934. Up to 766 conditions per place. [2024-06-20 15:15:02,231 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 149 selfloop transitions, 50 changer transitions 0/201 dead transitions. [2024-06-20 15:15:02,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 201 transitions, 2618 flow [2024-06-20 15:15:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 15:15:02,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 15:15:02,232 INFO L175 Difference]: Start difference. First operand has 227 places, 186 transitions, 2136 flow. Second operand 9 states and 101 transitions. [2024-06-20 15:15:02,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 201 transitions, 2618 flow [2024-06-20 15:15:02,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 201 transitions, 2532 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:02,515 INFO L231 Difference]: Finished difference. Result has 227 places, 187 transitions, 2192 flow [2024-06-20 15:15:02,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2192, PETRI_PLACES=227, PETRI_TRANSITIONS=187} [2024-06-20 15:15:02,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-20 15:15:02,516 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 187 transitions, 2192 flow [2024-06-20 15:15:02,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:02,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:02,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:15:02,516 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:02,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -40130824, now seen corresponding path program 5 times [2024-06-20 15:15:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153641596] [2024-06-20 15:15:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:03,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:03,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153641596] [2024-06-20 15:15:03,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153641596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:03,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:03,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:03,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783366863] [2024-06-20 15:15:03,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:03,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:03,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:03,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:03,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:03,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 187 transitions, 2192 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:03,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:03,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:04,164 INFO L124 PetriNetUnfolderBase]: 552/1002 cut-off events. [2024-06-20 15:15:04,164 INFO L125 PetriNetUnfolderBase]: For 84389/84395 co-relation queries the response was YES. [2024-06-20 15:15:04,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7189 conditions, 1002 events. 552/1002 cut-off events. For 84389/84395 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5055 event pairs, 92 based on Foata normal form. 2/999 useless extension candidates. Maximal degree in co-relation 7075. Up to 805 conditions per place. [2024-06-20 15:15:04,172 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 157 selfloop transitions, 46 changer transitions 0/205 dead transitions. [2024-06-20 15:15:04,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 205 transitions, 2728 flow [2024-06-20 15:15:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 15:15:04,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-20 15:15:04,173 INFO L175 Difference]: Start difference. First operand has 227 places, 187 transitions, 2192 flow. Second operand 10 states and 111 transitions. [2024-06-20 15:15:04,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 205 transitions, 2728 flow [2024-06-20 15:15:04,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 205 transitions, 2596 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:04,455 INFO L231 Difference]: Finished difference. Result has 230 places, 189 transitions, 2231 flow [2024-06-20 15:15:04,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2231, PETRI_PLACES=230, PETRI_TRANSITIONS=189} [2024-06-20 15:15:04,456 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-20 15:15:04,456 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 189 transitions, 2231 flow [2024-06-20 15:15:04,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:04,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:04,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:15:04,457 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:04,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash -678556550, now seen corresponding path program 13 times [2024-06-20 15:15:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412690127] [2024-06-20 15:15:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:05,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:05,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412690127] [2024-06-20 15:15:05,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412690127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:05,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:05,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:15:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840186270] [2024-06-20 15:15:05,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:15:05,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:15:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:15:05,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:05,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 189 transitions, 2231 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:05,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:05,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:05,505 INFO L124 PetriNetUnfolderBase]: 556/1009 cut-off events. [2024-06-20 15:15:05,506 INFO L125 PetriNetUnfolderBase]: For 86491/86491 co-relation queries the response was YES. [2024-06-20 15:15:05,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7241 conditions, 1009 events. 556/1009 cut-off events. For 86491/86491 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5093 event pairs, 119 based on Foata normal form. 2/1010 useless extension candidates. Maximal degree in co-relation 7126. Up to 974 conditions per place. [2024-06-20 15:15:05,515 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 185 selfloop transitions, 14 changer transitions 0/201 dead transitions. [2024-06-20 15:15:05,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 201 transitions, 2697 flow [2024-06-20 15:15:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-06-20 15:15:05,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31899641577060933 [2024-06-20 15:15:05,516 INFO L175 Difference]: Start difference. First operand has 230 places, 189 transitions, 2231 flow. Second operand 9 states and 89 transitions. [2024-06-20 15:15:05,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 201 transitions, 2697 flow [2024-06-20 15:15:05,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 201 transitions, 2550 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:05,798 INFO L231 Difference]: Finished difference. Result has 231 places, 190 transitions, 2156 flow [2024-06-20 15:15:05,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=231, PETRI_TRANSITIONS=190} [2024-06-20 15:15:05,798 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-20 15:15:05,798 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 190 transitions, 2156 flow [2024-06-20 15:15:05,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:05,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:05,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:15:05,799 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:05,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash -39900184, now seen corresponding path program 6 times [2024-06-20 15:15:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:05,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859595035] [2024-06-20 15:15:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:05,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859595035] [2024-06-20 15:15:07,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859595035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421097829] [2024-06-20 15:15:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:07,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:07,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 190 transitions, 2156 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:07,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:07,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:07,673 INFO L124 PetriNetUnfolderBase]: 567/1028 cut-off events. [2024-06-20 15:15:07,673 INFO L125 PetriNetUnfolderBase]: For 92574/92580 co-relation queries the response was YES. [2024-06-20 15:15:07,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7436 conditions, 1028 events. 567/1028 cut-off events. For 92574/92580 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5196 event pairs, 92 based on Foata normal form. 2/1025 useless extension candidates. Maximal degree in co-relation 7320. Up to 807 conditions per place. [2024-06-20 15:15:07,682 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 158 selfloop transitions, 49 changer transitions 0/209 dead transitions. [2024-06-20 15:15:07,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 209 transitions, 2936 flow [2024-06-20 15:15:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-20 15:15:07,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-20 15:15:07,684 INFO L175 Difference]: Start difference. First operand has 231 places, 190 transitions, 2156 flow. Second operand 9 states and 104 transitions. [2024-06-20 15:15:07,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 209 transitions, 2936 flow [2024-06-20 15:15:07,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 209 transitions, 2874 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:07,956 INFO L231 Difference]: Finished difference. Result has 233 places, 194 transitions, 2351 flow [2024-06-20 15:15:07,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2351, PETRI_PLACES=233, PETRI_TRANSITIONS=194} [2024-06-20 15:15:07,956 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-20 15:15:07,957 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 194 transitions, 2351 flow [2024-06-20 15:15:07,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:07,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:07,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:15:07,958 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:07,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash -39891504, now seen corresponding path program 3 times [2024-06-20 15:15:07,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:07,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221279148] [2024-06-20 15:15:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:09,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:09,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221279148] [2024-06-20 15:15:09,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221279148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:09,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:09,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:09,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979842746] [2024-06-20 15:15:09,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:09,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:09,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:09,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:09,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:09,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:09,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 194 transitions, 2351 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:09,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:09,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:09,966 INFO L124 PetriNetUnfolderBase]: 571/1036 cut-off events. [2024-06-20 15:15:09,967 INFO L125 PetriNetUnfolderBase]: For 94803/94809 co-relation queries the response was YES. [2024-06-20 15:15:09,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7571 conditions, 1036 events. 571/1036 cut-off events. For 94803/94809 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5255 event pairs, 107 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 7454. Up to 901 conditions per place. [2024-06-20 15:15:09,975 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 166 selfloop transitions, 40 changer transitions 0/208 dead transitions. [2024-06-20 15:15:09,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 208 transitions, 2825 flow [2024-06-20 15:15:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-20 15:15:09,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313782991202346 [2024-06-20 15:15:09,982 INFO L175 Difference]: Start difference. First operand has 233 places, 194 transitions, 2351 flow. Second operand 11 states and 113 transitions. [2024-06-20 15:15:09,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 208 transitions, 2825 flow [2024-06-20 15:15:10,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 208 transitions, 2693 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:10,264 INFO L231 Difference]: Finished difference. Result has 238 places, 195 transitions, 2333 flow [2024-06-20 15:15:10,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2333, PETRI_PLACES=238, PETRI_TRANSITIONS=195} [2024-06-20 15:15:10,265 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-20 15:15:10,265 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 195 transitions, 2333 flow [2024-06-20 15:15:10,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:10,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:10,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:15:10,266 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:10,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1783545064, now seen corresponding path program 14 times [2024-06-20 15:15:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:10,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622819321] [2024-06-20 15:15:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:11,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622819321] [2024-06-20 15:15:11,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622819321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:11,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:11,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:11,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814822491] [2024-06-20 15:15:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:11,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:11,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:11,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 195 transitions, 2333 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:11,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:11,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:11,515 INFO L124 PetriNetUnfolderBase]: 575/1044 cut-off events. [2024-06-20 15:15:11,516 INFO L125 PetriNetUnfolderBase]: For 93663/93669 co-relation queries the response was YES. [2024-06-20 15:15:11,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7626 conditions, 1044 events. 575/1044 cut-off events. For 93663/93669 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5334 event pairs, 102 based on Foata normal form. 2/1041 useless extension candidates. Maximal degree in co-relation 7508. Up to 883 conditions per place. [2024-06-20 15:15:11,525 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 171 selfloop transitions, 36 changer transitions 0/209 dead transitions. [2024-06-20 15:15:11,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 209 transitions, 2829 flow [2024-06-20 15:15:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 15:15:11,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-20 15:15:11,526 INFO L175 Difference]: Start difference. First operand has 238 places, 195 transitions, 2333 flow. Second operand 9 states and 96 transitions. [2024-06-20 15:15:11,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 209 transitions, 2829 flow [2024-06-20 15:15:11,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 209 transitions, 2725 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:11,863 INFO L231 Difference]: Finished difference. Result has 238 places, 196 transitions, 2347 flow [2024-06-20 15:15:11,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2347, PETRI_PLACES=238, PETRI_TRANSITIONS=196} [2024-06-20 15:15:11,864 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-20 15:15:11,864 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 196 transitions, 2347 flow [2024-06-20 15:15:11,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:11,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:11,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:15:11,865 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:11,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash -678549606, now seen corresponding path program 7 times [2024-06-20 15:15:11,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:11,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900619847] [2024-06-20 15:15:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:11,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:13,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:13,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900619847] [2024-06-20 15:15:13,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900619847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:13,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:13,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143617825] [2024-06-20 15:15:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:13,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:13,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:13,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 196 transitions, 2347 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:13,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:13,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:13,820 INFO L124 PetriNetUnfolderBase]: 581/1053 cut-off events. [2024-06-20 15:15:13,821 INFO L125 PetriNetUnfolderBase]: For 96529/96529 co-relation queries the response was YES. [2024-06-20 15:15:13,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 1053 events. 581/1053 cut-off events. For 96529/96529 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5370 event pairs, 121 based on Foata normal form. 2/1054 useless extension candidates. Maximal degree in co-relation 7575. Up to 943 conditions per place. [2024-06-20 15:15:13,830 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 179 selfloop transitions, 32 changer transitions 0/213 dead transitions. [2024-06-20 15:15:13,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 213 transitions, 3043 flow [2024-06-20 15:15:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-20 15:15:13,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-20 15:15:13,831 INFO L175 Difference]: Start difference. First operand has 238 places, 196 transitions, 2347 flow. Second operand 10 states and 109 transitions. [2024-06-20 15:15:13,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 213 transitions, 3043 flow [2024-06-20 15:15:14,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 213 transitions, 2935 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:14,144 INFO L231 Difference]: Finished difference. Result has 241 places, 198 transitions, 2364 flow [2024-06-20 15:15:14,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2364, PETRI_PLACES=241, PETRI_TRANSITIONS=198} [2024-06-20 15:15:14,144 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-20 15:15:14,144 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 198 transitions, 2364 flow [2024-06-20 15:15:14,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:14,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:14,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:15:14,145 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:14,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash -46571508, now seen corresponding path program 15 times [2024-06-20 15:15:14,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:14,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925522463] [2024-06-20 15:15:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:14,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:14,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925522463] [2024-06-20 15:15:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925522463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:14,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:14,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:14,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074250159] [2024-06-20 15:15:14,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:14,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:15,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:15,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 198 transitions, 2364 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:15,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:15,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:15,319 INFO L124 PetriNetUnfolderBase]: 578/1049 cut-off events. [2024-06-20 15:15:15,319 INFO L125 PetriNetUnfolderBase]: For 91000/91006 co-relation queries the response was YES. [2024-06-20 15:15:15,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7425 conditions, 1049 events. 578/1049 cut-off events. For 91000/91006 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5359 event pairs, 95 based on Foata normal form. 2/1046 useless extension candidates. Maximal degree in co-relation 7305. Up to 888 conditions per place. [2024-06-20 15:15:15,328 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 174 selfloop transitions, 35 changer transitions 0/211 dead transitions. [2024-06-20 15:15:15,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 211 transitions, 2820 flow [2024-06-20 15:15:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 15:15:15,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-20 15:15:15,330 INFO L175 Difference]: Start difference. First operand has 241 places, 198 transitions, 2364 flow. Second operand 9 states and 95 transitions. [2024-06-20 15:15:15,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 211 transitions, 2820 flow [2024-06-20 15:15:15,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 211 transitions, 2736 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:15,681 INFO L231 Difference]: Finished difference. Result has 243 places, 198 transitions, 2354 flow [2024-06-20 15:15:15,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2354, PETRI_PLACES=243, PETRI_TRANSITIONS=198} [2024-06-20 15:15:15,682 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-20 15:15:15,682 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 198 transitions, 2354 flow [2024-06-20 15:15:15,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:15,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:15,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:15:15,683 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:15,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash -678318966, now seen corresponding path program 8 times [2024-06-20 15:15:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:15,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970318781] [2024-06-20 15:15:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:15,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:16,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:16,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970318781] [2024-06-20 15:15:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970318781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:16,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142451142] [2024-06-20 15:15:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:16,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:16,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 198 transitions, 2354 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:16,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:16,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:17,373 INFO L124 PetriNetUnfolderBase]: 584/1059 cut-off events. [2024-06-20 15:15:17,373 INFO L125 PetriNetUnfolderBase]: For 93432/93438 co-relation queries the response was YES. [2024-06-20 15:15:17,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7519 conditions, 1059 events. 584/1059 cut-off events. For 93432/93438 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5429 event pairs, 90 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 7398. Up to 587 conditions per place. [2024-06-20 15:15:17,382 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 97 changer transitions 0/217 dead transitions. [2024-06-20 15:15:17,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 217 transitions, 3076 flow [2024-06-20 15:15:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:15:17,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-20 15:15:17,384 INFO L175 Difference]: Start difference. First operand has 243 places, 198 transitions, 2354 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:15:17,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 217 transitions, 3076 flow [2024-06-20 15:15:17,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 217 transitions, 2923 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:17,728 INFO L231 Difference]: Finished difference. Result has 245 places, 200 transitions, 2458 flow [2024-06-20 15:15:17,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2458, PETRI_PLACES=245, PETRI_TRANSITIONS=200} [2024-06-20 15:15:17,729 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-20 15:15:17,729 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 200 transitions, 2458 flow [2024-06-20 15:15:17,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:17,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:15:17,730 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:17,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash -678310286, now seen corresponding path program 4 times [2024-06-20 15:15:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:17,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436464501] [2024-06-20 15:15:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:19,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:19,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436464501] [2024-06-20 15:15:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436464501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:19,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:19,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:19,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366027181] [2024-06-20 15:15:19,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:19,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:19,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:19,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:19,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 200 transitions, 2458 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:19,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:19,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:19,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:20,012 INFO L124 PetriNetUnfolderBase]: 588/1066 cut-off events. [2024-06-20 15:15:20,012 INFO L125 PetriNetUnfolderBase]: For 95452/95452 co-relation queries the response was YES. [2024-06-20 15:15:20,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7654 conditions, 1066 events. 588/1066 cut-off events. For 95452/95452 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5473 event pairs, 126 based on Foata normal form. 2/1067 useless extension candidates. Maximal degree in co-relation 7532. Up to 1031 conditions per place. [2024-06-20 15:15:20,022 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 194 selfloop transitions, 17 changer transitions 0/213 dead transitions. [2024-06-20 15:15:20,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 213 transitions, 2938 flow [2024-06-20 15:15:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-20 15:15:20,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-06-20 15:15:20,023 INFO L175 Difference]: Start difference. First operand has 245 places, 200 transitions, 2458 flow. Second operand 11 states and 103 transitions. [2024-06-20 15:15:20,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 213 transitions, 2938 flow [2024-06-20 15:15:20,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 213 transitions, 2674 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:20,356 INFO L231 Difference]: Finished difference. Result has 247 places, 201 transitions, 2264 flow [2024-06-20 15:15:20,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2264, PETRI_PLACES=247, PETRI_TRANSITIONS=201} [2024-06-20 15:15:20,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-20 15:15:20,356 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 201 transitions, 2264 flow [2024-06-20 15:15:20,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:20,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:20,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:15:20,357 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:20,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1783365140, now seen corresponding path program 9 times [2024-06-20 15:15:20,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:20,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561411435] [2024-06-20 15:15:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:21,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:21,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561411435] [2024-06-20 15:15:21,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561411435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:21,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:21,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:21,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697978444] [2024-06-20 15:15:21,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:21,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:21,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:21,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 201 transitions, 2264 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:21,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:21,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:21,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:22,188 INFO L124 PetriNetUnfolderBase]: 584/1061 cut-off events. [2024-06-20 15:15:22,188 INFO L125 PetriNetUnfolderBase]: For 88328/88334 co-relation queries the response was YES. [2024-06-20 15:15:22,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7111 conditions, 1061 events. 584/1061 cut-off events. For 88328/88334 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5423 event pairs, 99 based on Foata normal form. 2/1058 useless extension candidates. Maximal degree in co-relation 6989. Up to 890 conditions per place. [2024-06-20 15:15:22,196 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 175 selfloop transitions, 39 changer transitions 0/216 dead transitions. [2024-06-20 15:15:22,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 216 transitions, 2746 flow [2024-06-20 15:15:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 15:15:22,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 15:15:22,197 INFO L175 Difference]: Start difference. First operand has 247 places, 201 transitions, 2264 flow. Second operand 10 states and 106 transitions. [2024-06-20 15:15:22,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 216 transitions, 2746 flow [2024-06-20 15:15:22,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 216 transitions, 2654 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:22,473 INFO L231 Difference]: Finished difference. Result has 248 places, 201 transitions, 2255 flow [2024-06-20 15:15:22,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2255, PETRI_PLACES=248, PETRI_TRANSITIONS=201} [2024-06-20 15:15:22,473 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-20 15:15:22,474 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 201 transitions, 2255 flow [2024-06-20 15:15:22,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:22,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:22,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:22,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:15:22,474 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:22,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash -393219096, now seen corresponding path program 10 times [2024-06-20 15:15:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:22,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090211393] [2024-06-20 15:15:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:23,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090211393] [2024-06-20 15:15:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090211393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:23,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:23,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840146078] [2024-06-20 15:15:23,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:23,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:23,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:23,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:23,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:23,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 201 transitions, 2255 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:23,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:23,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:23,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:23,985 INFO L124 PetriNetUnfolderBase]: 590/1070 cut-off events. [2024-06-20 15:15:23,985 INFO L125 PetriNetUnfolderBase]: For 90064/90064 co-relation queries the response was YES. [2024-06-20 15:15:23,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7204 conditions, 1070 events. 590/1070 cut-off events. For 90064/90064 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5501 event pairs, 124 based on Foata normal form. 2/1071 useless extension candidates. Maximal degree in co-relation 7081. Up to 1006 conditions per place. [2024-06-20 15:15:23,994 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 193 selfloop transitions, 23 changer transitions 0/218 dead transitions. [2024-06-20 15:15:23,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 218 transitions, 2965 flow [2024-06-20 15:15:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-20 15:15:23,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-20 15:15:23,995 INFO L175 Difference]: Start difference. First operand has 248 places, 201 transitions, 2255 flow. Second operand 11 states and 112 transitions. [2024-06-20 15:15:23,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 218 transitions, 2965 flow [2024-06-20 15:15:24,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 218 transitions, 2866 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:24,311 INFO L231 Difference]: Finished difference. Result has 250 places, 203 transitions, 2261 flow [2024-06-20 15:15:24,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2261, PETRI_PLACES=250, PETRI_TRANSITIONS=203} [2024-06-20 15:15:24,311 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-20 15:15:24,311 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 203 transitions, 2261 flow [2024-06-20 15:15:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:24,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:24,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:24,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:15:24,312 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:24,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash -678310596, now seen corresponding path program 11 times [2024-06-20 15:15:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813126931] [2024-06-20 15:15:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:24,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:25,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:25,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813126931] [2024-06-20 15:15:25,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813126931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:25,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:25,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:25,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279648165] [2024-06-20 15:15:25,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:25,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:25,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:25,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:25,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:25,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:25,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 203 transitions, 2261 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:25,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:25,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:25,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:25,771 INFO L124 PetriNetUnfolderBase]: 586/1064 cut-off events. [2024-06-20 15:15:25,772 INFO L125 PetriNetUnfolderBase]: For 83824/83824 co-relation queries the response was YES. [2024-06-20 15:15:25,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 1064 events. 586/1064 cut-off events. For 83824/83824 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5473 event pairs, 121 based on Foata normal form. 2/1065 useless extension candidates. Maximal degree in co-relation 6815. Up to 949 conditions per place. [2024-06-20 15:15:25,781 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 38 changer transitions 0/221 dead transitions. [2024-06-20 15:15:25,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 221 transitions, 2943 flow [2024-06-20 15:15:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 15:15:25,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-20 15:15:25,783 INFO L175 Difference]: Start difference. First operand has 250 places, 203 transitions, 2261 flow. Second operand 11 states and 120 transitions. [2024-06-20 15:15:25,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 221 transitions, 2943 flow [2024-06-20 15:15:26,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 221 transitions, 2863 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:26,080 INFO L231 Difference]: Finished difference. Result has 252 places, 203 transitions, 2265 flow [2024-06-20 15:15:26,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2265, PETRI_PLACES=252, PETRI_TRANSITIONS=203} [2024-06-20 15:15:26,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-20 15:15:26,081 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 203 transitions, 2265 flow [2024-06-20 15:15:26,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:26,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:26,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:26,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:15:26,082 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:26,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:26,082 INFO L85 PathProgramCache]: Analyzing trace with hash -382734896, now seen corresponding path program 5 times [2024-06-20 15:15:26,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:26,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505911269] [2024-06-20 15:15:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:26,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:27,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505911269] [2024-06-20 15:15:27,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505911269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:27,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:27,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188229926] [2024-06-20 15:15:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:27,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:27,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:27,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 203 transitions, 2265 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:27,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:27,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:27,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:27,377 INFO L124 PetriNetUnfolderBase]: 590/1072 cut-off events. [2024-06-20 15:15:27,378 INFO L125 PetriNetUnfolderBase]: For 85738/85738 co-relation queries the response was YES. [2024-06-20 15:15:27,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 1072 events. 590/1072 cut-off events. For 85738/85738 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5529 event pairs, 126 based on Foata normal form. 2/1073 useless extension candidates. Maximal degree in co-relation 6921. Up to 1012 conditions per place. [2024-06-20 15:15:27,387 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 197 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2024-06-20 15:15:27,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 217 transitions, 2937 flow [2024-06-20 15:15:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-20 15:15:27,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-20 15:15:27,388 INFO L175 Difference]: Start difference. First operand has 252 places, 203 transitions, 2265 flow. Second operand 10 states and 98 transitions. [2024-06-20 15:15:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 217 transitions, 2937 flow [2024-06-20 15:15:27,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 217 transitions, 2781 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:27,631 INFO L231 Difference]: Finished difference. Result has 250 places, 204 transitions, 2181 flow [2024-06-20 15:15:27,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2181, PETRI_PLACES=250, PETRI_TRANSITIONS=204} [2024-06-20 15:15:27,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-20 15:15:27,631 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 204 transitions, 2181 flow [2024-06-20 15:15:27,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:27,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:27,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:27,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:15:27,632 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:27,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash 149512940, now seen corresponding path program 6 times [2024-06-20 15:15:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:27,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275943042] [2024-06-20 15:15:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:27,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:28,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275943042] [2024-06-20 15:15:28,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275943042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:28,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:28,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:28,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835715402] [2024-06-20 15:15:28,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:28,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:28,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:28,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:28,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 204 transitions, 2181 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:28,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:28,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:28,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:29,067 INFO L124 PetriNetUnfolderBase]: 594/1080 cut-off events. [2024-06-20 15:15:29,068 INFO L125 PetriNetUnfolderBase]: For 85409/85409 co-relation queries the response was YES. [2024-06-20 15:15:29,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6999 conditions, 1080 events. 594/1080 cut-off events. For 85409/85409 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5583 event pairs, 128 based on Foata normal form. 2/1081 useless extension candidates. Maximal degree in co-relation 6874. Up to 1039 conditions per place. [2024-06-20 15:15:29,077 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 195 selfloop transitions, 19 changer transitions 0/216 dead transitions. [2024-06-20 15:15:29,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 216 transitions, 2667 flow [2024-06-20 15:15:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-20 15:15:29,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-20 15:15:29,078 INFO L175 Difference]: Start difference. First operand has 250 places, 204 transitions, 2181 flow. Second operand 10 states and 98 transitions. [2024-06-20 15:15:29,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 216 transitions, 2667 flow [2024-06-20 15:15:29,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 216 transitions, 2561 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:29,381 INFO L231 Difference]: Finished difference. Result has 252 places, 205 transitions, 2151 flow [2024-06-20 15:15:29,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2151, PETRI_PLACES=252, PETRI_TRANSITIONS=205} [2024-06-20 15:15:29,382 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-20 15:15:29,382 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 205 transitions, 2151 flow [2024-06-20 15:15:29,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:29,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:29,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:15:29,383 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:29,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2130188622, now seen corresponding path program 7 times [2024-06-20 15:15:29,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346067563] [2024-06-20 15:15:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:30,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:30,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346067563] [2024-06-20 15:15:30,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346067563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:30,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:30,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:30,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770165960] [2024-06-20 15:15:30,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:30,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:30,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:30,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 205 transitions, 2151 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:30,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:30,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:30,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:30,681 INFO L124 PetriNetUnfolderBase]: 591/1075 cut-off events. [2024-06-20 15:15:30,681 INFO L125 PetriNetUnfolderBase]: For 78277/78277 co-relation queries the response was YES. [2024-06-20 15:15:30,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 1075 events. 591/1075 cut-off events. For 78277/78277 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5557 event pairs, 127 based on Foata normal form. 2/1076 useless extension candidates. Maximal degree in co-relation 6514. Up to 1014 conditions per place. [2024-06-20 15:15:30,691 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 194 selfloop transitions, 21 changer transitions 0/217 dead transitions. [2024-06-20 15:15:30,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 217 transitions, 2609 flow [2024-06-20 15:15:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-06-20 15:15:30,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30791788856304986 [2024-06-20 15:15:30,692 INFO L175 Difference]: Start difference. First operand has 252 places, 205 transitions, 2151 flow. Second operand 11 states and 105 transitions. [2024-06-20 15:15:30,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 217 transitions, 2609 flow [2024-06-20 15:15:31,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 217 transitions, 2525 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:31,010 INFO L231 Difference]: Finished difference. Result has 255 places, 205 transitions, 2117 flow [2024-06-20 15:15:31,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2117, PETRI_PLACES=255, PETRI_TRANSITIONS=205} [2024-06-20 15:15:31,011 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-20 15:15:31,011 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 205 transitions, 2117 flow [2024-06-20 15:15:31,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:31,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:31,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:31,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:15:31,011 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:31,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash 139393300, now seen corresponding path program 12 times [2024-06-20 15:15:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:31,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720895699] [2024-06-20 15:15:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:31,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:32,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:32,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720895699] [2024-06-20 15:15:32,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720895699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:32,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:32,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:15:32,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910582276] [2024-06-20 15:15:32,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:32,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:15:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:15:32,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:15:32,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:32,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 205 transitions, 2117 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:32,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:32,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:32,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:32,568 INFO L124 PetriNetUnfolderBase]: 587/1069 cut-off events. [2024-06-20 15:15:32,568 INFO L125 PetriNetUnfolderBase]: For 70520/70520 co-relation queries the response was YES. [2024-06-20 15:15:32,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6350 conditions, 1069 events. 587/1069 cut-off events. For 70520/70520 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5529 event pairs, 125 based on Foata normal form. 2/1070 useless extension candidates. Maximal degree in co-relation 6224. Up to 1008 conditions per place. [2024-06-20 15:15:32,577 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 191 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2024-06-20 15:15:32,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 217 transitions, 2583 flow [2024-06-20 15:15:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-20 15:15:32,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32903225806451614 [2024-06-20 15:15:32,579 INFO L175 Difference]: Start difference. First operand has 255 places, 205 transitions, 2117 flow. Second operand 10 states and 102 transitions. [2024-06-20 15:15:32,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 217 transitions, 2583 flow [2024-06-20 15:15:32,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 217 transitions, 2507 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:32,883 INFO L231 Difference]: Finished difference. Result has 253 places, 205 transitions, 2097 flow [2024-06-20 15:15:32,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2097, PETRI_PLACES=253, PETRI_TRANSITIONS=205} [2024-06-20 15:15:32,883 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2024-06-20 15:15:32,884 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 205 transitions, 2097 flow [2024-06-20 15:15:32,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:32,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:32,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:32,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:15:32,884 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:32,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:32,885 INFO L85 PathProgramCache]: Analyzing trace with hash 56746622, now seen corresponding path program 1 times [2024-06-20 15:15:32,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:32,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198527718] [2024-06-20 15:15:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:32,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198527718] [2024-06-20 15:15:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198527718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:33,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:33,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:33,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218696408] [2024-06-20 15:15:33,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:33,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:33,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:33,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:33,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 205 transitions, 2097 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:33,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:33,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:33,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:34,378 INFO L124 PetriNetUnfolderBase]: 591/1077 cut-off events. [2024-06-20 15:15:34,378 INFO L125 PetriNetUnfolderBase]: For 67776/67776 co-relation queries the response was YES. [2024-06-20 15:15:34,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6395 conditions, 1077 events. 591/1077 cut-off events. For 67776/67776 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5578 event pairs, 79 based on Foata normal form. 2/1078 useless extension candidates. Maximal degree in co-relation 6270. Up to 873 conditions per place. [2024-06-20 15:15:34,389 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 190 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2024-06-20 15:15:34,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 223 transitions, 2615 flow [2024-06-20 15:15:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-20 15:15:34,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3258064516129032 [2024-06-20 15:15:34,391 INFO L175 Difference]: Start difference. First operand has 253 places, 205 transitions, 2097 flow. Second operand 10 states and 101 transitions. [2024-06-20 15:15:34,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 223 transitions, 2615 flow [2024-06-20 15:15:34,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 223 transitions, 2562 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:34,716 INFO L231 Difference]: Finished difference. Result has 254 places, 206 transitions, 2149 flow [2024-06-20 15:15:34,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2149, PETRI_PLACES=254, PETRI_TRANSITIONS=206} [2024-06-20 15:15:34,724 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-20 15:15:34,724 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 206 transitions, 2149 flow [2024-06-20 15:15:34,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:34,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:34,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:34,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:15:34,725 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:34,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1195824618, now seen corresponding path program 2 times [2024-06-20 15:15:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:34,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353534275] [2024-06-20 15:15:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:34,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:36,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:36,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353534275] [2024-06-20 15:15:36,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353534275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:36,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:36,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114548341] [2024-06-20 15:15:36,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:36,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:36,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:36,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 206 transitions, 2149 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:36,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:36,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:36,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:36,619 INFO L124 PetriNetUnfolderBase]: 595/1085 cut-off events. [2024-06-20 15:15:36,619 INFO L125 PetriNetUnfolderBase]: For 68488/68488 co-relation queries the response was YES. [2024-06-20 15:15:36,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6523 conditions, 1085 events. 595/1085 cut-off events. For 68488/68488 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5625 event pairs, 100 based on Foata normal form. 2/1086 useless extension candidates. Maximal degree in co-relation 6398. Up to 941 conditions per place. [2024-06-20 15:15:36,628 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 37 changer transitions 1/223 dead transitions. [2024-06-20 15:15:36,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 223 transitions, 2679 flow [2024-06-20 15:15:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 15:15:36,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:15:36,630 INFO L175 Difference]: Start difference. First operand has 254 places, 206 transitions, 2149 flow. Second operand 10 states and 110 transitions. [2024-06-20 15:15:36,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 223 transitions, 2679 flow [2024-06-20 15:15:36,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 223 transitions, 2586 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:36,887 INFO L231 Difference]: Finished difference. Result has 256 places, 207 transitions, 2174 flow [2024-06-20 15:15:36,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2174, PETRI_PLACES=256, PETRI_TRANSITIONS=207} [2024-06-20 15:15:36,888 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-20 15:15:36,888 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 207 transitions, 2174 flow [2024-06-20 15:15:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:36,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:36,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:36,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:15:36,889 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:36,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1366370694, now seen corresponding path program 3 times [2024-06-20 15:15:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:36,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191194874] [2024-06-20 15:15:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:36,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:37,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191194874] [2024-06-20 15:15:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191194874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:37,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:37,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:37,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524682394] [2024-06-20 15:15:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:37,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:37,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:37,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:37,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 207 transitions, 2174 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:37,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:37,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:37,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:38,403 INFO L124 PetriNetUnfolderBase]: 599/1093 cut-off events. [2024-06-20 15:15:38,404 INFO L125 PetriNetUnfolderBase]: For 72820/72820 co-relation queries the response was YES. [2024-06-20 15:15:38,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6588 conditions, 1093 events. 599/1093 cut-off events. For 72820/72820 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5676 event pairs, 108 based on Foata normal form. 2/1094 useless extension candidates. Maximal degree in co-relation 6462. Up to 961 conditions per place. [2024-06-20 15:15:38,414 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 195 selfloop transitions, 27 changer transitions 0/224 dead transitions. [2024-06-20 15:15:38,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 224 transitions, 2696 flow [2024-06-20 15:15:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-20 15:15:38,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-20 15:15:38,417 INFO L175 Difference]: Start difference. First operand has 256 places, 207 transitions, 2174 flow. Second operand 10 states and 104 transitions. [2024-06-20 15:15:38,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 224 transitions, 2696 flow [2024-06-20 15:15:38,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 224 transitions, 2588 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:38,665 INFO L231 Difference]: Finished difference. Result has 258 places, 208 transitions, 2166 flow [2024-06-20 15:15:38,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2166, PETRI_PLACES=258, PETRI_TRANSITIONS=208} [2024-06-20 15:15:38,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-06-20 15:15:38,666 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 208 transitions, 2166 flow [2024-06-20 15:15:38,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:38,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:38,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:15:38,667 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:38,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1195974348, now seen corresponding path program 4 times [2024-06-20 15:15:38,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:38,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746513218] [2024-06-20 15:15:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:39,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746513218] [2024-06-20 15:15:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746513218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:39,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:39,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314587881] [2024-06-20 15:15:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:39,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:39,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:39,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 208 transitions, 2166 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:39,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:39,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:39,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:40,291 INFO L124 PetriNetUnfolderBase]: 603/1101 cut-off events. [2024-06-20 15:15:40,291 INFO L125 PetriNetUnfolderBase]: For 74431/74431 co-relation queries the response was YES. [2024-06-20 15:15:40,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6615 conditions, 1101 events. 603/1101 cut-off events. For 74431/74431 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5750 event pairs, 100 based on Foata normal form. 2/1102 useless extension candidates. Maximal degree in co-relation 6488. Up to 967 conditions per place. [2024-06-20 15:15:40,302 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 193 selfloop transitions, 30 changer transitions 0/225 dead transitions. [2024-06-20 15:15:40,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 225 transitions, 2696 flow [2024-06-20 15:15:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 15:15:40,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 15:15:40,303 INFO L175 Difference]: Start difference. First operand has 258 places, 208 transitions, 2166 flow. Second operand 10 states and 106 transitions. [2024-06-20 15:15:40,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 225 transitions, 2696 flow [2024-06-20 15:15:40,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 225 transitions, 2606 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:40,541 INFO L231 Difference]: Finished difference. Result has 260 places, 209 transitions, 2184 flow [2024-06-20 15:15:40,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2184, PETRI_PLACES=260, PETRI_TRANSITIONS=209} [2024-06-20 15:15:40,541 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2024-06-20 15:15:40,541 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 209 transitions, 2184 flow [2024-06-20 15:15:40,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:40,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:40,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:15:40,542 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:40,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:40,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1195824401, now seen corresponding path program 1 times [2024-06-20 15:15:40,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:40,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542604033] [2024-06-20 15:15:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:40,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542604033] [2024-06-20 15:15:41,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542604033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:41,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348933341] [2024-06-20 15:15:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:41,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:41,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:41,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:41,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 209 transitions, 2184 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:41,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:41,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:42,501 INFO L124 PetriNetUnfolderBase]: 601/1098 cut-off events. [2024-06-20 15:15:42,501 INFO L125 PetriNetUnfolderBase]: For 66572/66572 co-relation queries the response was YES. [2024-06-20 15:15:42,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 1098 events. 601/1098 cut-off events. For 66572/66572 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5735 event pairs, 103 based on Foata normal form. 1/1098 useless extension candidates. Maximal degree in co-relation 6324. Up to 946 conditions per place. [2024-06-20 15:15:42,511 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 181 selfloop transitions, 40 changer transitions 2/225 dead transitions. [2024-06-20 15:15:42,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 225 transitions, 2684 flow [2024-06-20 15:15:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 15:15:42,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-20 15:15:42,512 INFO L175 Difference]: Start difference. First operand has 260 places, 209 transitions, 2184 flow. Second operand 10 states and 112 transitions. [2024-06-20 15:15:42,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 225 transitions, 2684 flow [2024-06-20 15:15:42,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 225 transitions, 2574 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:42,841 INFO L231 Difference]: Finished difference. Result has 262 places, 209 transitions, 2162 flow [2024-06-20 15:15:42,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2162, PETRI_PLACES=262, PETRI_TRANSITIONS=209} [2024-06-20 15:15:42,842 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-20 15:15:42,842 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 209 transitions, 2162 flow [2024-06-20 15:15:42,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:42,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:42,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:15:42,843 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:42,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1508306894, now seen corresponding path program 5 times [2024-06-20 15:15:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:42,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78223820] [2024-06-20 15:15:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78223820] [2024-06-20 15:15:44,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78223820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:44,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:44,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601584466] [2024-06-20 15:15:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:44,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:44,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:44,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:44,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 209 transitions, 2162 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:44,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:44,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:44,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:44,585 INFO L124 PetriNetUnfolderBase]: 605/1106 cut-off events. [2024-06-20 15:15:44,585 INFO L125 PetriNetUnfolderBase]: For 72317/72317 co-relation queries the response was YES. [2024-06-20 15:15:44,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 1106 events. 605/1106 cut-off events. For 72317/72317 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5791 event pairs, 105 based on Foata normal form. 2/1107 useless extension candidates. Maximal degree in co-relation 6387. Up to 966 conditions per place. [2024-06-20 15:15:44,596 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 190 selfloop transitions, 34 changer transitions 0/226 dead transitions. [2024-06-20 15:15:44,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 226 transitions, 2700 flow [2024-06-20 15:15:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 15:15:44,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 15:15:44,597 INFO L175 Difference]: Start difference. First operand has 262 places, 209 transitions, 2162 flow. Second operand 10 states and 108 transitions. [2024-06-20 15:15:44,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 226 transitions, 2700 flow [2024-06-20 15:15:44,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 226 transitions, 2576 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:44,945 INFO L231 Difference]: Finished difference. Result has 263 places, 210 transitions, 2156 flow [2024-06-20 15:15:44,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2156, PETRI_PLACES=263, PETRI_TRANSITIONS=210} [2024-06-20 15:15:44,947 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-06-20 15:15:44,948 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 210 transitions, 2156 flow [2024-06-20 15:15:44,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:44,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:44,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:44,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:15:44,948 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:44,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1876447280, now seen corresponding path program 6 times [2024-06-20 15:15:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:44,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933245167] [2024-06-20 15:15:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:46,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933245167] [2024-06-20 15:15:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933245167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:46,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:46,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:46,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620668700] [2024-06-20 15:15:46,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:46,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:46,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:46,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 210 transitions, 2156 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:46,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:46,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:46,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:46,680 INFO L124 PetriNetUnfolderBase]: 609/1112 cut-off events. [2024-06-20 15:15:46,680 INFO L125 PetriNetUnfolderBase]: For 73567/73569 co-relation queries the response was YES. [2024-06-20 15:15:46,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6587 conditions, 1112 events. 609/1112 cut-off events. For 73567/73569 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5823 event pairs, 85 based on Foata normal form. 4/1115 useless extension candidates. Maximal degree in co-relation 6457. Up to 954 conditions per place. [2024-06-20 15:15:46,691 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 198 selfloop transitions, 30 changer transitions 0/230 dead transitions. [2024-06-20 15:15:46,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 230 transitions, 2707 flow [2024-06-20 15:15:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 15:15:46,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 15:15:46,692 INFO L175 Difference]: Start difference. First operand has 263 places, 210 transitions, 2156 flow. Second operand 10 states and 107 transitions. [2024-06-20 15:15:46,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 230 transitions, 2707 flow [2024-06-20 15:15:47,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 230 transitions, 2585 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:47,039 INFO L231 Difference]: Finished difference. Result has 264 places, 211 transitions, 2146 flow [2024-06-20 15:15:47,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2146, PETRI_PLACES=264, PETRI_TRANSITIONS=211} [2024-06-20 15:15:47,039 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-20 15:15:47,040 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 211 transitions, 2146 flow [2024-06-20 15:15:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:47,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:47,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:15:47,041 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:47,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1880022200, now seen corresponding path program 7 times [2024-06-20 15:15:47,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:47,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597015342] [2024-06-20 15:15:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:47,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:48,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:48,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597015342] [2024-06-20 15:15:48,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597015342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:48,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:48,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:48,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547209389] [2024-06-20 15:15:48,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:48,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:48,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:48,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:48,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:48,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:48,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 211 transitions, 2146 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:48,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:48,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:48,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:48,971 INFO L124 PetriNetUnfolderBase]: 613/1120 cut-off events. [2024-06-20 15:15:48,972 INFO L125 PetriNetUnfolderBase]: For 75232/75234 co-relation queries the response was YES. [2024-06-20 15:15:48,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6604 conditions, 1120 events. 613/1120 cut-off events. For 75232/75234 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5901 event pairs, 110 based on Foata normal form. 4/1123 useless extension candidates. Maximal degree in co-relation 6474. Up to 993 conditions per place. [2024-06-20 15:15:48,981 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 199 selfloop transitions, 30 changer transitions 0/231 dead transitions. [2024-06-20 15:15:48,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 231 transitions, 2705 flow [2024-06-20 15:15:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 15:15:48,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-20 15:15:48,983 INFO L175 Difference]: Start difference. First operand has 264 places, 211 transitions, 2146 flow. Second operand 10 states and 108 transitions. [2024-06-20 15:15:48,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 231 transitions, 2705 flow [2024-06-20 15:15:49,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 231 transitions, 2603 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:49,323 INFO L231 Difference]: Finished difference. Result has 266 places, 212 transitions, 2158 flow [2024-06-20 15:15:49,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2158, PETRI_PLACES=266, PETRI_TRANSITIONS=212} [2024-06-20 15:15:49,323 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-20 15:15:49,323 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 212 transitions, 2158 flow [2024-06-20 15:15:49,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:49,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:49,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:49,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:15:49,324 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:49,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1880166350, now seen corresponding path program 8 times [2024-06-20 15:15:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:49,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71903889] [2024-06-20 15:15:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:50,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71903889] [2024-06-20 15:15:50,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71903889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:50,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:50,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:50,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582403334] [2024-06-20 15:15:50,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:50,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:50,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:50,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:50,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:50,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 212 transitions, 2158 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:50,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:50,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:50,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:51,040 INFO L124 PetriNetUnfolderBase]: 617/1128 cut-off events. [2024-06-20 15:15:51,040 INFO L125 PetriNetUnfolderBase]: For 76934/76936 co-relation queries the response was YES. [2024-06-20 15:15:51,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6650 conditions, 1128 events. 617/1128 cut-off events. For 76934/76936 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5971 event pairs, 110 based on Foata normal form. 4/1131 useless extension candidates. Maximal degree in co-relation 6519. Up to 998 conditions per place. [2024-06-20 15:15:51,051 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 197 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-20 15:15:51,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 232 transitions, 2725 flow [2024-06-20 15:15:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-20 15:15:51,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-20 15:15:51,052 INFO L175 Difference]: Start difference. First operand has 266 places, 212 transitions, 2158 flow. Second operand 10 states and 109 transitions. [2024-06-20 15:15:51,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 232 transitions, 2725 flow [2024-06-20 15:15:51,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 232 transitions, 2621 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:51,430 INFO L231 Difference]: Finished difference. Result has 268 places, 213 transitions, 2176 flow [2024-06-20 15:15:51,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2176, PETRI_PLACES=268, PETRI_TRANSITIONS=213} [2024-06-20 15:15:51,430 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-20 15:15:51,430 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 213 transitions, 2176 flow [2024-06-20 15:15:51,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:51,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:51,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:15:51,431 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:51,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1880172147, now seen corresponding path program 2 times [2024-06-20 15:15:51,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:51,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279586329] [2024-06-20 15:15:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:53,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:53,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279586329] [2024-06-20 15:15:53,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279586329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:53,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:53,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052260653] [2024-06-20 15:15:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:53,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:53,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 213 transitions, 2176 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:53,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:53,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:53,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:53,865 INFO L124 PetriNetUnfolderBase]: 615/1125 cut-off events. [2024-06-20 15:15:53,865 INFO L125 PetriNetUnfolderBase]: For 67883/67885 co-relation queries the response was YES. [2024-06-20 15:15:53,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 1125 events. 615/1125 cut-off events. For 67883/67885 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5925 event pairs, 110 based on Foata normal form. 3/1127 useless extension candidates. Maximal degree in co-relation 6320. Up to 989 conditions per place. [2024-06-20 15:15:53,875 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 191 selfloop transitions, 37 changer transitions 0/230 dead transitions. [2024-06-20 15:15:53,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 230 transitions, 2689 flow [2024-06-20 15:15:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-20 15:15:53,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-20 15:15:53,876 INFO L175 Difference]: Start difference. First operand has 268 places, 213 transitions, 2176 flow. Second operand 9 states and 103 transitions. [2024-06-20 15:15:53,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 230 transitions, 2689 flow [2024-06-20 15:15:54,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 230 transitions, 2571 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:54,130 INFO L231 Difference]: Finished difference. Result has 269 places, 213 transitions, 2142 flow [2024-06-20 15:15:54,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=260, 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=9, PETRI_FLOW=2142, PETRI_PLACES=269, PETRI_TRANSITIONS=213} [2024-06-20 15:15:54,131 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 239 predicate places. [2024-06-20 15:15:54,131 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 213 transitions, 2142 flow [2024-06-20 15:15:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:54,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:54,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:15:54,132 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:54,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1747007572, now seen corresponding path program 9 times [2024-06-20 15:15:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003737522] [2024-06-20 15:15:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:55,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:55,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003737522] [2024-06-20 15:15:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003737522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:55,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:55,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639477656] [2024-06-20 15:15:55,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:55,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:55,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:55,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:55,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:55,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 213 transitions, 2142 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:55,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:55,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:55,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:55,670 INFO L124 PetriNetUnfolderBase]: 619/1133 cut-off events. [2024-06-20 15:15:55,671 INFO L125 PetriNetUnfolderBase]: For 74141/74143 co-relation queries the response was YES. [2024-06-20 15:15:55,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 1133 events. 619/1133 cut-off events. For 74141/74143 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5992 event pairs, 110 based on Foata normal form. 4/1136 useless extension candidates. Maximal degree in co-relation 6370. Up to 1000 conditions per place. [2024-06-20 15:15:55,681 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 195 selfloop transitions, 36 changer transitions 0/233 dead transitions. [2024-06-20 15:15:55,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 233 transitions, 2717 flow [2024-06-20 15:15:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 15:15:55,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:15:55,683 INFO L175 Difference]: Start difference. First operand has 269 places, 213 transitions, 2142 flow. Second operand 10 states and 110 transitions. [2024-06-20 15:15:55,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 233 transitions, 2717 flow [2024-06-20 15:15:55,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 233 transitions, 2419 flow, removed 24 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:55,985 INFO L231 Difference]: Finished difference. Result has 267 places, 214 transitions, 1975 flow [2024-06-20 15:15:55,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1844, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1975, PETRI_PLACES=267, PETRI_TRANSITIONS=214} [2024-06-20 15:15:55,985 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-20 15:15:55,986 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 214 transitions, 1975 flow [2024-06-20 15:15:55,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:55,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:55,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:55,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:15:55,986 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:55,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash 262492994, now seen corresponding path program 10 times [2024-06-20 15:15:55,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:55,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357019536] [2024-06-20 15:15:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:55,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:57,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357019536] [2024-06-20 15:15:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357019536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:57,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:57,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:15:57,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839417229] [2024-06-20 15:15:57,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:57,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:15:57,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:15:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:15:57,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:15:57,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 214 transitions, 1975 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:57,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:57,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:15:57,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:57,791 INFO L124 PetriNetUnfolderBase]: 623/1144 cut-off events. [2024-06-20 15:15:57,792 INFO L125 PetriNetUnfolderBase]: For 74903/74903 co-relation queries the response was YES. [2024-06-20 15:15:57,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6280 conditions, 1144 events. 623/1144 cut-off events. For 74903/74903 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6044 event pairs, 105 based on Foata normal form. 2/1143 useless extension candidates. Maximal degree in co-relation 6150. Up to 997 conditions per place. [2024-06-20 15:15:57,801 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 197 selfloop transitions, 34 changer transitions 0/233 dead transitions. [2024-06-20 15:15:57,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 233 transitions, 2552 flow [2024-06-20 15:15:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 15:15:57,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 15:15:57,803 INFO L175 Difference]: Start difference. First operand has 267 places, 214 transitions, 1975 flow. Second operand 10 states and 107 transitions. [2024-06-20 15:15:57,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 233 transitions, 2552 flow [2024-06-20 15:15:58,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 233 transitions, 2426 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:58,189 INFO L231 Difference]: Finished difference. Result has 268 places, 215 transitions, 1977 flow [2024-06-20 15:15:58,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1977, PETRI_PLACES=268, PETRI_TRANSITIONS=215} [2024-06-20 15:15:58,189 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-20 15:15:58,189 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 215 transitions, 1977 flow [2024-06-20 15:15:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:58,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:58,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:58,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:15:58,190 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:15:58,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2024272206, now seen corresponding path program 1 times [2024-06-20 15:15:58,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:58,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052427193] [2024-06-20 15:15:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:00,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:00,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052427193] [2024-06-20 15:16:00,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052427193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:00,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:00,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385785203] [2024-06-20 15:16:00,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:00,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:00,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:00,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:00,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 215 transitions, 1977 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:00,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:00,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:00,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:00,719 INFO L124 PetriNetUnfolderBase]: 643/1187 cut-off events. [2024-06-20 15:16:00,719 INFO L125 PetriNetUnfolderBase]: For 113710/113712 co-relation queries the response was YES. [2024-06-20 15:16:00,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6369 conditions, 1187 events. 643/1187 cut-off events. For 113710/113712 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6367 event pairs, 121 based on Foata normal form. 12/1196 useless extension candidates. Maximal degree in co-relation 6239. Up to 1015 conditions per place. [2024-06-20 15:16:00,729 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 201 selfloop transitions, 30 changer transitions 9/242 dead transitions. [2024-06-20 15:16:00,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 242 transitions, 2583 flow [2024-06-20 15:16:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 15:16:00,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-20 15:16:00,730 INFO L175 Difference]: Start difference. First operand has 268 places, 215 transitions, 1977 flow. Second operand 11 states and 122 transitions. [2024-06-20 15:16:00,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 242 transitions, 2583 flow [2024-06-20 15:16:01,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 242 transitions, 2465 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:01,129 INFO L231 Difference]: Finished difference. Result has 271 places, 213 transitions, 1901 flow [2024-06-20 15:16:01,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1901, PETRI_PLACES=271, PETRI_TRANSITIONS=213} [2024-06-20 15:16:01,129 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2024-06-20 15:16:01,130 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 213 transitions, 1901 flow [2024-06-20 15:16:01,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:01,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:01,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:01,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:16:01,130 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:01,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:01,131 INFO L85 PathProgramCache]: Analyzing trace with hash -750205118, now seen corresponding path program 11 times [2024-06-20 15:16:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:01,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100891140] [2024-06-20 15:16:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:02,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:02,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100891140] [2024-06-20 15:16:02,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100891140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:02,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:02,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:16:02,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755236993] [2024-06-20 15:16:02,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:02,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:16:02,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:16:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:16:02,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:02,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 213 transitions, 1901 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:02,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:02,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:02,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:02,879 INFO L124 PetriNetUnfolderBase]: 621/1146 cut-off events. [2024-06-20 15:16:02,879 INFO L125 PetriNetUnfolderBase]: For 76580/76580 co-relation queries the response was YES. [2024-06-20 15:16:02,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 1146 events. 621/1146 cut-off events. For 76580/76580 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6138 event pairs, 105 based on Foata normal form. 2/1145 useless extension candidates. Maximal degree in co-relation 6052. Up to 999 conditions per place. [2024-06-20 15:16:02,889 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 197 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-20 15:16:02,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 232 transitions, 2474 flow [2024-06-20 15:16:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 15:16:02,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 15:16:02,890 INFO L175 Difference]: Start difference. First operand has 271 places, 213 transitions, 1901 flow. Second operand 10 states and 106 transitions. [2024-06-20 15:16:02,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 232 transitions, 2474 flow [2024-06-20 15:16:03,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 232 transitions, 2414 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:03,192 INFO L231 Difference]: Finished difference. Result has 271 places, 214 transitions, 1969 flow [2024-06-20 15:16:03,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1969, PETRI_PLACES=271, PETRI_TRANSITIONS=214} [2024-06-20 15:16:03,192 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2024-06-20 15:16:03,192 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 214 transitions, 1969 flow [2024-06-20 15:16:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:03,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:16:03,193 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:03,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash 178414998, now seen corresponding path program 2 times [2024-06-20 15:16:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:03,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694621180] [2024-06-20 15:16:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:04,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:04,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694621180] [2024-06-20 15:16:04,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694621180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:04,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:04,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076477860] [2024-06-20 15:16:04,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:04,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:04,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 214 transitions, 1969 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:04,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:04,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:05,501 INFO L124 PetriNetUnfolderBase]: 637/1182 cut-off events. [2024-06-20 15:16:05,502 INFO L125 PetriNetUnfolderBase]: For 116015/116015 co-relation queries the response was YES. [2024-06-20 15:16:05,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6352 conditions, 1182 events. 637/1182 cut-off events. For 116015/116015 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6371 event pairs, 111 based on Foata normal form. 10/1189 useless extension candidates. Maximal degree in co-relation 6220. Up to 985 conditions per place. [2024-06-20 15:16:05,513 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 194 selfloop transitions, 33 changer transitions 9/238 dead transitions. [2024-06-20 15:16:05,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 238 transitions, 2558 flow [2024-06-20 15:16:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 15:16:05,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-20 15:16:05,523 INFO L175 Difference]: Start difference. First operand has 271 places, 214 transitions, 1969 flow. Second operand 11 states and 120 transitions. [2024-06-20 15:16:05,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 238 transitions, 2558 flow [2024-06-20 15:16:05,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 238 transitions, 2440 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:05,879 INFO L231 Difference]: Finished difference. Result has 274 places, 211 transitions, 1898 flow [2024-06-20 15:16:05,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1898, PETRI_PLACES=274, PETRI_TRANSITIONS=211} [2024-06-20 15:16:05,880 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-20 15:16:05,880 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 211 transitions, 1898 flow [2024-06-20 15:16:05,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:05,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:05,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:05,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:16:05,881 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:05,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1418137062, now seen corresponding path program 12 times [2024-06-20 15:16:05,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:05,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151607721] [2024-06-20 15:16:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:05,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:07,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:07,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151607721] [2024-06-20 15:16:07,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151607721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:07,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:07,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:07,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10122165] [2024-06-20 15:16:07,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:07,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:07,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:07,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:07,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 211 transitions, 1898 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:07,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:07,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:07,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:07,765 INFO L124 PetriNetUnfolderBase]: 615/1140 cut-off events. [2024-06-20 15:16:07,765 INFO L125 PetriNetUnfolderBase]: For 78396/78396 co-relation queries the response was YES. [2024-06-20 15:16:07,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6175 conditions, 1140 events. 615/1140 cut-off events. For 78396/78396 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6122 event pairs, 103 based on Foata normal form. 2/1139 useless extension candidates. Maximal degree in co-relation 6042. Up to 993 conditions per place. [2024-06-20 15:16:07,776 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 196 selfloop transitions, 32 changer transitions 0/230 dead transitions. [2024-06-20 15:16:07,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 230 transitions, 2465 flow [2024-06-20 15:16:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 15:16:07,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 15:16:07,777 INFO L175 Difference]: Start difference. First operand has 274 places, 211 transitions, 1898 flow. Second operand 10 states and 105 transitions. [2024-06-20 15:16:07,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 230 transitions, 2465 flow [2024-06-20 15:16:08,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 230 transitions, 2380 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-20 15:16:08,135 INFO L231 Difference]: Finished difference. Result has 270 places, 212 transitions, 1941 flow [2024-06-20 15:16:08,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1941, PETRI_PLACES=270, PETRI_TRANSITIONS=212} [2024-06-20 15:16:08,136 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-20 15:16:08,136 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 212 transitions, 1941 flow [2024-06-20 15:16:08,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:08,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:08,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:08,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:16:08,137 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:08,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1211333892, now seen corresponding path program 13 times [2024-06-20 15:16:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:08,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349445696] [2024-06-20 15:16:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349445696] [2024-06-20 15:16:10,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349445696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:10,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:10,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:10,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814646758] [2024-06-20 15:16:10,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:10,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:10,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:10,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:10,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:10,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:10,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 212 transitions, 1941 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:10,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:10,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:10,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:10,623 INFO L124 PetriNetUnfolderBase]: 619/1148 cut-off events. [2024-06-20 15:16:10,623 INFO L125 PetriNetUnfolderBase]: For 78874/78874 co-relation queries the response was YES. [2024-06-20 15:16:10,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1148 events. 619/1148 cut-off events. For 78874/78874 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6193 event pairs, 101 based on Foata normal form. 2/1147 useless extension candidates. Maximal degree in co-relation 6150. Up to 933 conditions per place. [2024-06-20 15:16:10,634 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 182 selfloop transitions, 47 changer transitions 0/231 dead transitions. [2024-06-20 15:16:10,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 231 transitions, 2520 flow [2024-06-20 15:16:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-20 15:16:10,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-20 15:16:10,635 INFO L175 Difference]: Start difference. First operand has 270 places, 212 transitions, 1941 flow. Second operand 10 states and 109 transitions. [2024-06-20 15:16:10,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 231 transitions, 2520 flow [2024-06-20 15:16:11,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 231 transitions, 2402 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:11,039 INFO L231 Difference]: Finished difference. Result has 272 places, 213 transitions, 1983 flow [2024-06-20 15:16:11,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1983, PETRI_PLACES=272, PETRI_TRANSITIONS=213} [2024-06-20 15:16:11,039 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2024-06-20 15:16:11,040 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 213 transitions, 1983 flow [2024-06-20 15:16:11,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:11,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:11,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:11,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:16:11,040 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:11,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1211325956, now seen corresponding path program 3 times [2024-06-20 15:16:11,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:11,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854564184] [2024-06-20 15:16:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:11,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:12,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:12,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854564184] [2024-06-20 15:16:12,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854564184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:12,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:12,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:12,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006185570] [2024-06-20 15:16:12,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:12,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:12,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:12,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:13,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:13,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 213 transitions, 1983 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:13,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:13,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:13,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:13,616 INFO L124 PetriNetUnfolderBase]: 641/1194 cut-off events. [2024-06-20 15:16:13,616 INFO L125 PetriNetUnfolderBase]: For 118980/118980 co-relation queries the response was YES. [2024-06-20 15:16:13,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 1194 events. 641/1194 cut-off events. For 118980/118980 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6509 event pairs, 105 based on Foata normal form. 10/1201 useless extension candidates. Maximal degree in co-relation 6308. Up to 929 conditions per place. [2024-06-20 15:16:13,627 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 182 selfloop transitions, 46 changer transitions 9/239 dead transitions. [2024-06-20 15:16:13,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 239 transitions, 2590 flow [2024-06-20 15:16:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 15:16:13,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-20 15:16:13,628 INFO L175 Difference]: Start difference. First operand has 272 places, 213 transitions, 1983 flow. Second operand 11 states and 122 transitions. [2024-06-20 15:16:13,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 239 transitions, 2590 flow [2024-06-20 15:16:13,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 239 transitions, 2440 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:13,981 INFO L231 Difference]: Finished difference. Result has 276 places, 212 transitions, 1927 flow [2024-06-20 15:16:13,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1927, PETRI_PLACES=276, PETRI_TRANSITIONS=212} [2024-06-20 15:16:13,982 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-20 15:16:13,982 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 212 transitions, 1927 flow [2024-06-20 15:16:13,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:13,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:13,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:13,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:16:13,983 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:13,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1218685542, now seen corresponding path program 14 times [2024-06-20 15:16:13,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:13,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477577968] [2024-06-20 15:16:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:15,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:15,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477577968] [2024-06-20 15:16:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477577968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:15,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:15,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:15,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506514439] [2024-06-20 15:16:15,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:15,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:15,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:15,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:15,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 212 transitions, 1927 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:15,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:15,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:15,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:16,288 INFO L124 PetriNetUnfolderBase]: 673/1243 cut-off events. [2024-06-20 15:16:16,288 INFO L125 PetriNetUnfolderBase]: For 80716/80716 co-relation queries the response was YES. [2024-06-20 15:16:16,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6764 conditions, 1243 events. 673/1243 cut-off events. For 80716/80716 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6787 event pairs, 132 based on Foata normal form. 2/1241 useless extension candidates. Maximal degree in co-relation 6629. Up to 1071 conditions per place. [2024-06-20 15:16:16,300 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 211 selfloop transitions, 44 changer transitions 0/257 dead transitions. [2024-06-20 15:16:16,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 257 transitions, 2843 flow [2024-06-20 15:16:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 15:16:16,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-20 15:16:16,301 INFO L175 Difference]: Start difference. First operand has 276 places, 212 transitions, 1927 flow. Second operand 11 states and 117 transitions. [2024-06-20 15:16:16,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 257 transitions, 2843 flow [2024-06-20 15:16:16,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 257 transitions, 2701 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:16:16,686 INFO L231 Difference]: Finished difference. Result has 282 places, 235 transitions, 2279 flow [2024-06-20 15:16:16,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2279, PETRI_PLACES=282, PETRI_TRANSITIONS=235} [2024-06-20 15:16:16,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2024-06-20 15:16:16,686 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 235 transitions, 2279 flow [2024-06-20 15:16:16,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:16,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:16,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:16,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:16:16,687 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:16,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 970835768, now seen corresponding path program 15 times [2024-06-20 15:16:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:16,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884165324] [2024-06-20 15:16:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:18,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884165324] [2024-06-20 15:16:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884165324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:18,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:18,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:18,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053320143] [2024-06-20 15:16:18,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:18,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:18,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:18,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:18,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:18,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:18,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 235 transitions, 2279 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:18,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:18,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:18,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:18,703 INFO L124 PetriNetUnfolderBase]: 696/1292 cut-off events. [2024-06-20 15:16:18,703 INFO L125 PetriNetUnfolderBase]: For 82963/82963 co-relation queries the response was YES. [2024-06-20 15:16:18,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7214 conditions, 1292 events. 696/1292 cut-off events. For 82963/82963 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7198 event pairs, 125 based on Foata normal form. 2/1292 useless extension candidates. Maximal degree in co-relation 7073. Up to 1089 conditions per place. [2024-06-20 15:16:18,716 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 220 selfloop transitions, 48 changer transitions 0/270 dead transitions. [2024-06-20 15:16:18,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 270 transitions, 3076 flow [2024-06-20 15:16:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-20 15:16:18,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-20 15:16:18,717 INFO L175 Difference]: Start difference. First operand has 282 places, 235 transitions, 2279 flow. Second operand 12 states and 129 transitions. [2024-06-20 15:16:18,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 270 transitions, 3076 flow [2024-06-20 15:16:19,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 270 transitions, 2988 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 15:16:19,313 INFO L231 Difference]: Finished difference. Result has 296 places, 245 transitions, 2489 flow [2024-06-20 15:16:19,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2489, PETRI_PLACES=296, PETRI_TRANSITIONS=245} [2024-06-20 15:16:19,313 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-20 15:16:19,313 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 245 transitions, 2489 flow [2024-06-20 15:16:19,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:19,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:19,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:19,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:16:19,314 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:19,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash -770645056, now seen corresponding path program 4 times [2024-06-20 15:16:19,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:19,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128482470] [2024-06-20 15:16:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:19,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128482470] [2024-06-20 15:16:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128482470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026558390] [2024-06-20 15:16:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:20,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:20,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 245 transitions, 2489 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:20,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:20,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:20,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:21,474 INFO L124 PetriNetUnfolderBase]: 725/1351 cut-off events. [2024-06-20 15:16:21,474 INFO L125 PetriNetUnfolderBase]: For 124199/124199 co-relation queries the response was YES. [2024-06-20 15:16:21,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7535 conditions, 1351 events. 725/1351 cut-off events. For 124199/124199 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7588 event pairs, 133 based on Foata normal form. 10/1359 useless extension candidates. Maximal degree in co-relation 7388. Up to 1095 conditions per place. [2024-06-20 15:16:21,487 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 216 selfloop transitions, 49 changer transitions 11/278 dead transitions. [2024-06-20 15:16:21,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 278 transitions, 3237 flow [2024-06-20 15:16:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-20 15:16:21,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-20 15:16:21,488 INFO L175 Difference]: Start difference. First operand has 296 places, 245 transitions, 2489 flow. Second operand 12 states and 133 transitions. [2024-06-20 15:16:21,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 278 transitions, 3237 flow [2024-06-20 15:16:22,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 278 transitions, 3079 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:22,100 INFO L231 Difference]: Finished difference. Result has 303 places, 246 transitions, 2457 flow [2024-06-20 15:16:22,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2457, PETRI_PLACES=303, PETRI_TRANSITIONS=246} [2024-06-20 15:16:22,100 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-06-20 15:16:22,100 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 246 transitions, 2457 flow [2024-06-20 15:16:22,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:22,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:22,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:22,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:16:22,101 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:22,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash -770635756, now seen corresponding path program 5 times [2024-06-20 15:16:22,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:22,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716332118] [2024-06-20 15:16:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:22,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:24,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716332118] [2024-06-20 15:16:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716332118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:24,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:24,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766904159] [2024-06-20 15:16:24,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:24,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:24,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:24,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 246 transitions, 2457 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:24,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:24,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:24,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:24,622 INFO L124 PetriNetUnfolderBase]: 770/1450 cut-off events. [2024-06-20 15:16:24,622 INFO L125 PetriNetUnfolderBase]: For 169894/169894 co-relation queries the response was YES. [2024-06-20 15:16:24,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8843 conditions, 1450 events. 770/1450 cut-off events. For 169894/169894 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8313 event pairs, 150 based on Foata normal form. 8/1456 useless extension candidates. Maximal degree in co-relation 8696. Up to 1067 conditions per place. [2024-06-20 15:16:24,638 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 226 selfloop transitions, 47 changer transitions 8/283 dead transitions. [2024-06-20 15:16:24,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 283 transitions, 3449 flow [2024-06-20 15:16:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-20 15:16:24,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 15:16:24,639 INFO L175 Difference]: Start difference. First operand has 303 places, 246 transitions, 2457 flow. Second operand 12 states and 136 transitions. [2024-06-20 15:16:24,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 283 transitions, 3449 flow [2024-06-20 15:16:25,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 283 transitions, 3369 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:25,501 INFO L231 Difference]: Finished difference. Result has 306 places, 244 transitions, 2453 flow [2024-06-20 15:16:25,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2453, PETRI_PLACES=306, PETRI_TRANSITIONS=244} [2024-06-20 15:16:25,502 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-20 15:16:25,502 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 244 transitions, 2453 flow [2024-06-20 15:16:25,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:25,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:25,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:25,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:16:25,503 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:25,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash -778269692, now seen corresponding path program 16 times [2024-06-20 15:16:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:25,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799872334] [2024-06-20 15:16:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:26,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:26,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799872334] [2024-06-20 15:16:26,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799872334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:26,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:26,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609234577] [2024-06-20 15:16:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:26,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:26,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:26,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 244 transitions, 2453 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:26,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:26,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:26,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:27,505 INFO L124 PetriNetUnfolderBase]: 739/1385 cut-off events. [2024-06-20 15:16:27,505 INFO L125 PetriNetUnfolderBase]: For 140643/140643 co-relation queries the response was YES. [2024-06-20 15:16:27,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8633 conditions, 1385 events. 739/1385 cut-off events. For 140643/140643 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7834 event pairs, 154 based on Foata normal form. 2/1385 useless extension candidates. Maximal degree in co-relation 8486. Up to 1170 conditions per place. [2024-06-20 15:16:27,517 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 221 selfloop transitions, 47 changer transitions 0/270 dead transitions. [2024-06-20 15:16:27,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 270 transitions, 3160 flow [2024-06-20 15:16:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 15:16:27,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-20 15:16:27,518 INFO L175 Difference]: Start difference. First operand has 306 places, 244 transitions, 2453 flow. Second operand 11 states and 120 transitions. [2024-06-20 15:16:27,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 270 transitions, 3160 flow [2024-06-20 15:16:28,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 270 transitions, 3052 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-20 15:16:28,332 INFO L231 Difference]: Finished difference. Result has 304 places, 247 transitions, 2528 flow [2024-06-20 15:16:28,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2528, PETRI_PLACES=304, PETRI_TRANSITIONS=247} [2024-06-20 15:16:28,332 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2024-06-20 15:16:28,333 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 247 transitions, 2528 flow [2024-06-20 15:16:28,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:28,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:28,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:28,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:16:28,333 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:28,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -778054366, now seen corresponding path program 6 times [2024-06-20 15:16:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:28,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19421618] [2024-06-20 15:16:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:28,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:30,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:30,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19421618] [2024-06-20 15:16:30,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19421618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:30,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:30,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:30,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998153442] [2024-06-20 15:16:30,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:30,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:30,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:30,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:30,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 247 transitions, 2528 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:30,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:30,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:30,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:31,320 INFO L124 PetriNetUnfolderBase]: 741/1395 cut-off events. [2024-06-20 15:16:31,320 INFO L125 PetriNetUnfolderBase]: For 160626/160626 co-relation queries the response was YES. [2024-06-20 15:16:31,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8228 conditions, 1395 events. 741/1395 cut-off events. For 160626/160626 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7934 event pairs, 150 based on Foata normal form. 10/1403 useless extension candidates. Maximal degree in co-relation 8082. Up to 1183 conditions per place. [2024-06-20 15:16:31,333 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 222 selfloop transitions, 43 changer transitions 9/276 dead transitions. [2024-06-20 15:16:31,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 276 transitions, 3234 flow [2024-06-20 15:16:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-20 15:16:31,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:16:31,334 INFO L175 Difference]: Start difference. First operand has 304 places, 247 transitions, 2528 flow. Second operand 12 states and 132 transitions. [2024-06-20 15:16:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 276 transitions, 3234 flow [2024-06-20 15:16:31,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 276 transitions, 3084 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:31,934 INFO L231 Difference]: Finished difference. Result has 308 places, 244 transitions, 2437 flow [2024-06-20 15:16:31,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2437, PETRI_PLACES=308, PETRI_TRANSITIONS=244} [2024-06-20 15:16:31,934 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-20 15:16:31,934 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 244 transitions, 2437 flow [2024-06-20 15:16:31,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:31,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:31,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:31,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:16:31,935 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:31,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1930731708, now seen corresponding path program 17 times [2024-06-20 15:16:31,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:31,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131752593] [2024-06-20 15:16:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:33,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:33,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131752593] [2024-06-20 15:16:33,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131752593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:33,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:33,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:33,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797836599] [2024-06-20 15:16:33,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:33,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:33,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:33,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:33,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 244 transitions, 2437 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:33,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:33,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:33,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:33,979 INFO L124 PetriNetUnfolderBase]: 719/1353 cut-off events. [2024-06-20 15:16:33,980 INFO L125 PetriNetUnfolderBase]: For 120483/120483 co-relation queries the response was YES. [2024-06-20 15:16:33,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8043 conditions, 1353 events. 719/1353 cut-off events. For 120483/120483 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7660 event pairs, 125 based on Foata normal form. 2/1353 useless extension candidates. Maximal degree in co-relation 7896. Up to 1113 conditions per place. [2024-06-20 15:16:33,993 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 197 selfloop transitions, 62 changer transitions 0/261 dead transitions. [2024-06-20 15:16:33,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 261 transitions, 3071 flow [2024-06-20 15:16:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 15:16:33,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 15:16:33,994 INFO L175 Difference]: Start difference. First operand has 308 places, 244 transitions, 2437 flow. Second operand 10 states and 107 transitions. [2024-06-20 15:16:33,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 261 transitions, 3071 flow [2024-06-20 15:16:34,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 261 transitions, 2945 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-20 15:16:34,694 INFO L231 Difference]: Finished difference. Result has 303 places, 245 transitions, 2511 flow [2024-06-20 15:16:34,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2511, PETRI_PLACES=303, PETRI_TRANSITIONS=245} [2024-06-20 15:16:34,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-06-20 15:16:34,695 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 245 transitions, 2511 flow [2024-06-20 15:16:34,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:34,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:34,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:16:34,696 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:34,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1930947034, now seen corresponding path program 7 times [2024-06-20 15:16:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650341174] [2024-06-20 15:16:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:36,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650341174] [2024-06-20 15:16:36,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650341174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:36,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:36,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:36,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045010131] [2024-06-20 15:16:36,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:36,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:36,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:36,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:36,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 245 transitions, 2511 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:36,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:36,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:36,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:37,448 INFO L124 PetriNetUnfolderBase]: 735/1389 cut-off events. [2024-06-20 15:16:37,448 INFO L125 PetriNetUnfolderBase]: For 163848/163848 co-relation queries the response was YES. [2024-06-20 15:16:37,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8207 conditions, 1389 events. 735/1389 cut-off events. For 163848/163848 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7906 event pairs, 131 based on Foata normal form. 10/1397 useless extension candidates. Maximal degree in co-relation 8062. Up to 1111 conditions per place. [2024-06-20 15:16:37,458 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 194 selfloop transitions, 60 changer transitions 11/267 dead transitions. [2024-06-20 15:16:37,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 267 transitions, 3149 flow [2024-06-20 15:16:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 15:16:37,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-20 15:16:37,460 INFO L175 Difference]: Start difference. First operand has 303 places, 245 transitions, 2511 flow. Second operand 11 states and 120 transitions. [2024-06-20 15:16:37,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 267 transitions, 3149 flow [2024-06-20 15:16:38,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 267 transitions, 2961 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:38,169 INFO L231 Difference]: Finished difference. Result has 306 places, 242 transitions, 2423 flow [2024-06-20 15:16:38,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2423, PETRI_PLACES=306, PETRI_TRANSITIONS=242} [2024-06-20 15:16:38,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-20 15:16:38,170 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 242 transitions, 2423 flow [2024-06-20 15:16:38,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:38,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:38,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:16:38,171 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:38,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash 379763718, now seen corresponding path program 8 times [2024-06-20 15:16:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804546704] [2024-06-20 15:16:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:38,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804546704] [2024-06-20 15:16:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804546704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:39,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:39,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:39,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857640206] [2024-06-20 15:16:39,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:39,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:39,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:39,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 242 transitions, 2423 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:39,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:39,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:39,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:39,986 INFO L124 PetriNetUnfolderBase]: 733/1395 cut-off events. [2024-06-20 15:16:39,987 INFO L125 PetriNetUnfolderBase]: For 197080/197080 co-relation queries the response was YES. [2024-06-20 15:16:39,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8058 conditions, 1395 events. 733/1395 cut-off events. For 197080/197080 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8001 event pairs, 141 based on Foata normal form. 16/1409 useless extension candidates. Maximal degree in co-relation 7912. Up to 992 conditions per place. [2024-06-20 15:16:40,000 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 177 selfloop transitions, 64 changer transitions 23/266 dead transitions. [2024-06-20 15:16:40,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 266 transitions, 3067 flow [2024-06-20 15:16:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-20 15:16:40,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-20 15:16:40,002 INFO L175 Difference]: Start difference. First operand has 306 places, 242 transitions, 2423 flow. Second operand 12 states and 130 transitions. [2024-06-20 15:16:40,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 266 transitions, 3067 flow [2024-06-20 15:16:40,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 266 transitions, 2943 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:16:40,595 INFO L231 Difference]: Finished difference. Result has 305 places, 230 transitions, 2315 flow [2024-06-20 15:16:40,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2315, PETRI_PLACES=305, PETRI_TRANSITIONS=230} [2024-06-20 15:16:40,595 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-20 15:16:40,596 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 230 transitions, 2315 flow [2024-06-20 15:16:40,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:40,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:40,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:16:40,596 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:40,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash 379773018, now seen corresponding path program 9 times [2024-06-20 15:16:40,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:40,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644669270] [2024-06-20 15:16:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:40,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:41,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:41,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644669270] [2024-06-20 15:16:41,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644669270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:41,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:41,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:41,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520059755] [2024-06-20 15:16:41,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:41,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:41,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:42,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:42,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 230 transitions, 2315 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:42,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:42,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:42,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:42,562 INFO L124 PetriNetUnfolderBase]: 703/1341 cut-off events. [2024-06-20 15:16:42,562 INFO L125 PetriNetUnfolderBase]: For 180158/180158 co-relation queries the response was YES. [2024-06-20 15:16:42,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8411 conditions, 1341 events. 703/1341 cut-off events. For 180158/180158 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7577 event pairs, 140 based on Foata normal form. 8/1347 useless extension candidates. Maximal degree in co-relation 8266. Up to 847 conditions per place. [2024-06-20 15:16:42,575 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 179 selfloop transitions, 58 changer transitions 17/256 dead transitions. [2024-06-20 15:16:42,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 256 transitions, 3179 flow [2024-06-20 15:16:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 15:16:42,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-20 15:16:42,576 INFO L175 Difference]: Start difference. First operand has 305 places, 230 transitions, 2315 flow. Second operand 11 states and 123 transitions. [2024-06-20 15:16:42,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 256 transitions, 3179 flow [2024-06-20 15:16:43,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 256 transitions, 3017 flow, removed 14 selfloop flow, removed 14 redundant places. [2024-06-20 15:16:43,451 INFO L231 Difference]: Finished difference. Result has 296 places, 222 transitions, 2213 flow [2024-06-20 15:16:43,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2213, PETRI_PLACES=296, PETRI_TRANSITIONS=222} [2024-06-20 15:16:43,451 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-20 15:16:43,452 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 222 transitions, 2213 flow [2024-06-20 15:16:43,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:43,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:43,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:16:43,452 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash -2025144596, now seen corresponding path program 18 times [2024-06-20 15:16:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:43,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056407034] [2024-06-20 15:16:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:44,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:44,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056407034] [2024-06-20 15:16:44,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056407034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:44,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:44,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:16:44,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092539972] [2024-06-20 15:16:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:44,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:16:44,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:16:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:16:44,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:44,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 222 transitions, 2213 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:44,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:44,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:44,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:45,363 INFO L124 PetriNetUnfolderBase]: 655/1240 cut-off events. [2024-06-20 15:16:45,364 INFO L125 PetriNetUnfolderBase]: For 142042/142042 co-relation queries the response was YES. [2024-06-20 15:16:45,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7928 conditions, 1240 events. 655/1240 cut-off events. For 142042/142042 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6849 event pairs, 149 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 7787. Up to 1056 conditions per place. [2024-06-20 15:16:45,377 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 190 selfloop transitions, 45 changer transitions 0/237 dead transitions. [2024-06-20 15:16:45,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 237 transitions, 2793 flow [2024-06-20 15:16:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 15:16:45,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 15:16:45,378 INFO L175 Difference]: Start difference. First operand has 296 places, 222 transitions, 2213 flow. Second operand 10 states and 105 transitions. [2024-06-20 15:16:45,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 237 transitions, 2793 flow [2024-06-20 15:16:46,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 237 transitions, 2661 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-20 15:16:46,007 INFO L231 Difference]: Finished difference. Result has 285 places, 223 transitions, 2241 flow [2024-06-20 15:16:46,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2241, PETRI_PLACES=285, PETRI_TRANSITIONS=223} [2024-06-20 15:16:46,008 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-20 15:16:46,008 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 223 transitions, 2241 flow [2024-06-20 15:16:46,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:46,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:46,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:46,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:16:46,009 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:46,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1443571024, now seen corresponding path program 19 times [2024-06-20 15:16:46,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:46,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944332546] [2024-06-20 15:16:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:46,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:47,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944332546] [2024-06-20 15:16:47,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944332546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:47,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:47,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500587262] [2024-06-20 15:16:47,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:47,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:47,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:47,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 223 transitions, 2241 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:47,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:47,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:47,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:48,012 INFO L124 PetriNetUnfolderBase]: 659/1248 cut-off events. [2024-06-20 15:16:48,012 INFO L125 PetriNetUnfolderBase]: For 133438/133438 co-relation queries the response was YES. [2024-06-20 15:16:48,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7934 conditions, 1248 events. 659/1248 cut-off events. For 133438/133438 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6895 event pairs, 147 based on Foata normal form. 2/1247 useless extension candidates. Maximal degree in co-relation 7798. Up to 1050 conditions per place. [2024-06-20 15:16:48,024 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 190 selfloop transitions, 46 changer transitions 0/238 dead transitions. [2024-06-20 15:16:48,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 238 transitions, 2819 flow [2024-06-20 15:16:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 15:16:48,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 15:16:48,026 INFO L175 Difference]: Start difference. First operand has 285 places, 223 transitions, 2241 flow. Second operand 10 states and 106 transitions. [2024-06-20 15:16:48,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 238 transitions, 2819 flow [2024-06-20 15:16:48,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 238 transitions, 2663 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-20 15:16:48,560 INFO L231 Difference]: Finished difference. Result has 286 places, 224 transitions, 2247 flow [2024-06-20 15:16:48,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2247, PETRI_PLACES=286, PETRI_TRANSITIONS=224} [2024-06-20 15:16:48,560 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-20 15:16:48,560 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 224 transitions, 2247 flow [2024-06-20 15:16:48,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:48,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:48,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:48,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:16:48,561 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:48,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash 439590584, now seen corresponding path program 20 times [2024-06-20 15:16:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:48,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597984376] [2024-06-20 15:16:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:49,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:49,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597984376] [2024-06-20 15:16:49,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597984376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:49,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:49,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:16:49,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633229519] [2024-06-20 15:16:49,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:49,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:16:49,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:16:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:16:49,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:49,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 224 transitions, 2247 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:49,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:49,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:49,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:50,177 INFO L124 PetriNetUnfolderBase]: 663/1256 cut-off events. [2024-06-20 15:16:50,178 INFO L125 PetriNetUnfolderBase]: For 133428/133428 co-relation queries the response was YES. [2024-06-20 15:16:50,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1256 events. 663/1256 cut-off events. For 133428/133428 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6936 event pairs, 270 based on Foata normal form. 2/1257 useless extension candidates. Maximal degree in co-relation 7818. Up to 1137 conditions per place. [2024-06-20 15:16:50,191 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 198 selfloop transitions, 38 changer transitions 0/238 dead transitions. [2024-06-20 15:16:50,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 238 transitions, 2823 flow [2024-06-20 15:16:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 15:16:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 15:16:50,195 INFO L175 Difference]: Start difference. First operand has 286 places, 224 transitions, 2247 flow. Second operand 10 states and 107 transitions. [2024-06-20 15:16:50,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 238 transitions, 2823 flow [2024-06-20 15:16:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 238 transitions, 2673 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:50,764 INFO L231 Difference]: Finished difference. Result has 288 places, 225 transitions, 2243 flow [2024-06-20 15:16:50,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2243, PETRI_PLACES=288, PETRI_TRANSITIONS=225} [2024-06-20 15:16:50,764 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-20 15:16:50,764 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 225 transitions, 2243 flow [2024-06-20 15:16:50,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:50,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:50,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:50,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:16:50,765 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:50,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1831205186, now seen corresponding path program 21 times [2024-06-20 15:16:50,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:50,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204903480] [2024-06-20 15:16:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:52,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:52,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204903480] [2024-06-20 15:16:52,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204903480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:52,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:52,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:52,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490128366] [2024-06-20 15:16:52,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:52,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:52,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:52,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:52,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:52,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:52,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 225 transitions, 2243 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:52,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:52,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:52,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:52,675 INFO L124 PetriNetUnfolderBase]: 667/1264 cut-off events. [2024-06-20 15:16:52,675 INFO L125 PetriNetUnfolderBase]: For 136095/136095 co-relation queries the response was YES. [2024-06-20 15:16:52,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7990 conditions, 1264 events. 667/1264 cut-off events. For 136095/136095 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7026 event pairs, 145 based on Foata normal form. 2/1263 useless extension candidates. Maximal degree in co-relation 7853. Up to 1054 conditions per place. [2024-06-20 15:16:52,687 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 187 selfloop transitions, 52 changer transitions 0/241 dead transitions. [2024-06-20 15:16:52,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 241 transitions, 2839 flow [2024-06-20 15:16:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 15:16:52,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:16:52,688 INFO L175 Difference]: Start difference. First operand has 288 places, 225 transitions, 2243 flow. Second operand 10 states and 110 transitions. [2024-06-20 15:16:52,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 241 transitions, 2839 flow [2024-06-20 15:16:53,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 241 transitions, 2703 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:53,343 INFO L231 Difference]: Finished difference. Result has 290 places, 226 transitions, 2283 flow [2024-06-20 15:16:53,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2283, PETRI_PLACES=290, PETRI_TRANSITIONS=226} [2024-06-20 15:16:53,344 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-20 15:16:53,344 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 226 transitions, 2283 flow [2024-06-20 15:16:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:53,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:16:53,345 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:53,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash 439585004, now seen corresponding path program 22 times [2024-06-20 15:16:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740134510] [2024-06-20 15:16:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:54,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:54,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740134510] [2024-06-20 15:16:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740134510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:54,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:54,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:16:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528463626] [2024-06-20 15:16:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:16:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:16:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:16:54,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:54,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 226 transitions, 2283 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:54,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:54,908 INFO L124 PetriNetUnfolderBase]: 715/1364 cut-off events. [2024-06-20 15:16:54,908 INFO L125 PetriNetUnfolderBase]: For 226814/226814 co-relation queries the response was YES. [2024-06-20 15:16:54,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9794 conditions, 1364 events. 715/1364 cut-off events. For 226814/226814 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7669 event pairs, 286 based on Foata normal form. 8/1371 useless extension candidates. Maximal degree in co-relation 9656. Up to 1139 conditions per place. [2024-06-20 15:16:54,919 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 203 selfloop transitions, 36 changer transitions 7/248 dead transitions. [2024-06-20 15:16:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 248 transitions, 3203 flow [2024-06-20 15:16:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 15:16:54,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-20 15:16:54,920 INFO L175 Difference]: Start difference. First operand has 290 places, 226 transitions, 2283 flow. Second operand 10 states and 114 transitions. [2024-06-20 15:16:54,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 248 transitions, 3203 flow [2024-06-20 15:16:55,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 248 transitions, 3037 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:55,810 INFO L231 Difference]: Finished difference. Result has 293 places, 225 transitions, 2254 flow [2024-06-20 15:16:55,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2254, PETRI_PLACES=293, PETRI_TRANSITIONS=225} [2024-06-20 15:16:55,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-20 15:16:55,811 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 225 transitions, 2254 flow [2024-06-20 15:16:55,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:55,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:55,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:55,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:16:55,812 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:55,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1443715174, now seen corresponding path program 23 times [2024-06-20 15:16:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:55,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69604093] [2024-06-20 15:16:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:55,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:57,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:57,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69604093] [2024-06-20 15:16:57,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69604093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:57,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:57,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:16:57,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689765322] [2024-06-20 15:16:57,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:16:57,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:16:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:16:57,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:16:57,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 225 transitions, 2254 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:57,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:57,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:16:57,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:57,556 INFO L124 PetriNetUnfolderBase]: 701/1334 cut-off events. [2024-06-20 15:16:57,556 INFO L125 PetriNetUnfolderBase]: For 201848/201848 co-relation queries the response was YES. [2024-06-20 15:16:57,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9595 conditions, 1334 events. 701/1334 cut-off events. For 201848/201848 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7454 event pairs, 169 based on Foata normal form. 2/1333 useless extension candidates. Maximal degree in co-relation 9455. Up to 1150 conditions per place. [2024-06-20 15:16:57,571 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 195 selfloop transitions, 43 changer transitions 0/240 dead transitions. [2024-06-20 15:16:57,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 240 transitions, 2838 flow [2024-06-20 15:16:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 15:16:57,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-20 15:16:57,572 INFO L175 Difference]: Start difference. First operand has 293 places, 225 transitions, 2254 flow. Second operand 10 states and 103 transitions. [2024-06-20 15:16:57,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 240 transitions, 2838 flow [2024-06-20 15:16:58,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 240 transitions, 2763 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:16:58,454 INFO L231 Difference]: Finished difference. Result has 292 places, 226 transitions, 2341 flow [2024-06-20 15:16:58,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2341, PETRI_PLACES=292, PETRI_TRANSITIONS=226} [2024-06-20 15:16:58,455 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-20 15:16:58,455 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 226 transitions, 2341 flow [2024-06-20 15:16:58,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:58,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:58,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:16:58,456 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:16:58,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1437993318, now seen corresponding path program 10 times [2024-06-20 15:16:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:58,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396517940] [2024-06-20 15:16:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:00,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396517940] [2024-06-20 15:17:00,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396517940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:00,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:00,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:00,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577199593] [2024-06-20 15:17:00,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:00,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:00,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:00,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:00,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 226 transitions, 2341 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:00,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:00,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:00,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:00,906 INFO L124 PetriNetUnfolderBase]: 717/1370 cut-off events. [2024-06-20 15:17:00,907 INFO L125 PetriNetUnfolderBase]: For 239066/239066 co-relation queries the response was YES. [2024-06-20 15:17:00,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9737 conditions, 1370 events. 717/1370 cut-off events. For 239066/239066 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7713 event pairs, 175 based on Foata normal form. 10/1377 useless extension candidates. Maximal degree in co-relation 9598. Up to 1136 conditions per place. [2024-06-20 15:17:00,922 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 191 selfloop transitions, 44 changer transitions 9/246 dead transitions. [2024-06-20 15:17:00,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 246 transitions, 2927 flow [2024-06-20 15:17:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-20 15:17:00,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-20 15:17:00,923 INFO L175 Difference]: Start difference. First operand has 292 places, 226 transitions, 2341 flow. Second operand 11 states and 118 transitions. [2024-06-20 15:17:00,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 246 transitions, 2927 flow [2024-06-20 15:17:01,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 246 transitions, 2775 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:01,907 INFO L231 Difference]: Finished difference. Result has 295 places, 223 transitions, 2260 flow [2024-06-20 15:17:01,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2260, PETRI_PLACES=295, PETRI_TRANSITIONS=223} [2024-06-20 15:17:01,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-20 15:17:01,908 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 223 transitions, 2260 flow [2024-06-20 15:17:01,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:01,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:01,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:01,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:17:01,909 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:01,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:01,909 INFO L85 PathProgramCache]: Analyzing trace with hash 439800330, now seen corresponding path program 11 times [2024-06-20 15:17:01,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:01,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923469105] [2024-06-20 15:17:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:01,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923469105] [2024-06-20 15:17:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923469105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:03,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:03,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:03,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627627802] [2024-06-20 15:17:03,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:03,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:03,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 223 transitions, 2260 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:03,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:03,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:03,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:03,643 INFO L124 PetriNetUnfolderBase]: 707/1356 cut-off events. [2024-06-20 15:17:03,644 INFO L125 PetriNetUnfolderBase]: For 239496/239496 co-relation queries the response was YES. [2024-06-20 15:17:03,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9584 conditions, 1356 events. 707/1356 cut-off events. For 239496/239496 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7652 event pairs, 294 based on Foata normal form. 10/1365 useless extension candidates. Maximal degree in co-relation 9444. Up to 1191 conditions per place. [2024-06-20 15:17:03,657 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 193 selfloop transitions, 30 changer transitions 17/242 dead transitions. [2024-06-20 15:17:03,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 242 transitions, 2832 flow [2024-06-20 15:17:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 15:17:03,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-20 15:17:03,659 INFO L175 Difference]: Start difference. First operand has 295 places, 223 transitions, 2260 flow. Second operand 11 states and 120 transitions. [2024-06-20 15:17:03,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 242 transitions, 2832 flow [2024-06-20 15:17:04,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 242 transitions, 2738 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:17:04,610 INFO L231 Difference]: Finished difference. Result has 293 places, 216 transitions, 2184 flow [2024-06-20 15:17:04,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2184, PETRI_PLACES=293, PETRI_TRANSITIONS=216} [2024-06-20 15:17:04,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-20 15:17:04,610 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 216 transitions, 2184 flow [2024-06-20 15:17:04,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:04,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:04,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:04,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:17:04,611 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:04,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1831210766, now seen corresponding path program 24 times [2024-06-20 15:17:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:04,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859772490] [2024-06-20 15:17:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:05,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:05,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859772490] [2024-06-20 15:17:05,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859772490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:05,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:05,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:05,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212259917] [2024-06-20 15:17:05,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:05,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:05,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:05,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:05,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:06,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:06,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 216 transitions, 2184 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:06,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:06,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:06,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:06,445 INFO L124 PetriNetUnfolderBase]: 673/1290 cut-off events. [2024-06-20 15:17:06,445 INFO L125 PetriNetUnfolderBase]: For 198212/198212 co-relation queries the response was YES. [2024-06-20 15:17:06,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9372 conditions, 1290 events. 673/1290 cut-off events. For 198212/198212 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7196 event pairs, 167 based on Foata normal form. 2/1289 useless extension candidates. Maximal degree in co-relation 9233. Up to 1097 conditions per place. [2024-06-20 15:17:06,459 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 183 selfloop transitions, 47 changer transitions 0/232 dead transitions. [2024-06-20 15:17:06,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 232 transitions, 2764 flow [2024-06-20 15:17:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 15:17:06,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 15:17:06,460 INFO L175 Difference]: Start difference. First operand has 293 places, 216 transitions, 2184 flow. Second operand 10 states and 107 transitions. [2024-06-20 15:17:06,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 232 transitions, 2764 flow [2024-06-20 15:17:07,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 232 transitions, 2682 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-20 15:17:07,548 INFO L231 Difference]: Finished difference. Result has 284 places, 217 transitions, 2274 flow [2024-06-20 15:17:07,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2274, PETRI_PLACES=284, PETRI_TRANSITIONS=217} [2024-06-20 15:17:07,549 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-20 15:17:07,549 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 217 transitions, 2274 flow [2024-06-20 15:17:07,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:07,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:07,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:07,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:17:07,549 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:07,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash 446942234, now seen corresponding path program 25 times [2024-06-20 15:17:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:07,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92341497] [2024-06-20 15:17:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:08,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92341497] [2024-06-20 15:17:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92341497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:08,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:17:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225139231] [2024-06-20 15:17:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:17:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:17:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:17:08,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:08,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 217 transitions, 2274 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:08,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:08,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:09,138 INFO L124 PetriNetUnfolderBase]: 677/1298 cut-off events. [2024-06-20 15:17:09,139 INFO L125 PetriNetUnfolderBase]: For 185590/185590 co-relation queries the response was YES. [2024-06-20 15:17:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9407 conditions, 1298 events. 677/1298 cut-off events. For 185590/185590 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7259 event pairs, 288 based on Foata normal form. 2/1299 useless extension candidates. Maximal degree in co-relation 9272. Up to 1201 conditions per place. [2024-06-20 15:17:09,151 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 196 selfloop transitions, 33 changer transitions 0/231 dead transitions. [2024-06-20 15:17:09,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 231 transitions, 2842 flow [2024-06-20 15:17:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 15:17:09,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 15:17:09,152 INFO L175 Difference]: Start difference. First operand has 284 places, 217 transitions, 2274 flow. Second operand 10 states and 106 transitions. [2024-06-20 15:17:09,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 231 transitions, 2842 flow [2024-06-20 15:17:09,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 231 transitions, 2684 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:09,851 INFO L231 Difference]: Finished difference. Result has 286 places, 218 transitions, 2258 flow [2024-06-20 15:17:09,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2258, PETRI_PLACES=286, PETRI_TRANSITIONS=218} [2024-06-20 15:17:09,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-20 15:17:09,851 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 218 transitions, 2258 flow [2024-06-20 15:17:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:09,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:09,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:09,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:17:09,852 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:09,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash 447209640, now seen corresponding path program 12 times [2024-06-20 15:17:09,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:09,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890047918] [2024-06-20 15:17:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:09,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:10,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:10,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890047918] [2024-06-20 15:17:10,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890047918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:10,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:10,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833678092] [2024-06-20 15:17:10,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:10,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:10,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:11,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:11,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 218 transitions, 2258 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:11,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:11,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:11,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:11,538 INFO L124 PetriNetUnfolderBase]: 693/1334 cut-off events. [2024-06-20 15:17:11,538 INFO L125 PetriNetUnfolderBase]: For 223394/223394 co-relation queries the response was YES. [2024-06-20 15:17:11,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9425 conditions, 1334 events. 693/1334 cut-off events. For 223394/223394 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7534 event pairs, 294 based on Foata normal form. 10/1343 useless extension candidates. Maximal degree in co-relation 9289. Up to 1185 conditions per place. [2024-06-20 15:17:11,551 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 192 selfloop transitions, 25 changer transitions 19/238 dead transitions. [2024-06-20 15:17:11,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 238 transitions, 2824 flow [2024-06-20 15:17:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-20 15:17:11,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-20 15:17:11,552 INFO L175 Difference]: Start difference. First operand has 286 places, 218 transitions, 2258 flow. Second operand 12 states and 127 transitions. [2024-06-20 15:17:11,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 238 transitions, 2824 flow [2024-06-20 15:17:12,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 238 transitions, 2692 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:12,470 INFO L231 Difference]: Finished difference. Result has 290 places, 209 transitions, 2118 flow [2024-06-20 15:17:12,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2118, PETRI_PLACES=290, PETRI_TRANSITIONS=209} [2024-06-20 15:17:12,471 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-20 15:17:12,471 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 209 transitions, 2118 flow [2024-06-20 15:17:12,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:12,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:12,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:17:12,472 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:12,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 447218940, now seen corresponding path program 13 times [2024-06-20 15:17:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111843002] [2024-06-20 15:17:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:13,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:13,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111843002] [2024-06-20 15:17:13,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111843002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:13,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:13,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:13,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097596211] [2024-06-20 15:17:13,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:13,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:13,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:13,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:13,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:13,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:13,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 209 transitions, 2118 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:13,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:13,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:13,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:14,159 INFO L124 PetriNetUnfolderBase]: 663/1284 cut-off events. [2024-06-20 15:17:14,159 INFO L125 PetriNetUnfolderBase]: For 215734/215734 co-relation queries the response was YES. [2024-06-20 15:17:14,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9110 conditions, 1284 events. 663/1284 cut-off events. For 215734/215734 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7204 event pairs, 159 based on Foata normal form. 8/1289 useless extension candidates. Maximal degree in co-relation 8973. Up to 831 conditions per place. [2024-06-20 15:17:14,172 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 83 changer transitions 13/226 dead transitions. [2024-06-20 15:17:14,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 226 transitions, 2644 flow [2024-06-20 15:17:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 15:17:14,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-20 15:17:14,177 INFO L175 Difference]: Start difference. First operand has 290 places, 209 transitions, 2118 flow. Second operand 10 states and 113 transitions. [2024-06-20 15:17:14,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 226 transitions, 2644 flow [2024-06-20 15:17:15,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 226 transitions, 2523 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-20 15:17:15,102 INFO L231 Difference]: Finished difference. Result has 280 places, 204 transitions, 2130 flow [2024-06-20 15:17:15,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2130, PETRI_PLACES=280, PETRI_TRANSITIONS=204} [2024-06-20 15:17:15,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-20 15:17:15,102 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 204 transitions, 2130 flow [2024-06-20 15:17:15,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:15,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:15,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:15,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:17:15,103 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:15,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1830995440, now seen corresponding path program 14 times [2024-06-20 15:17:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:15,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702731859] [2024-06-20 15:17:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:16,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:16,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702731859] [2024-06-20 15:17:16,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702731859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:16,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:16,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:16,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272520923] [2024-06-20 15:17:16,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:16,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:16,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:16,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:16,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:16,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 204 transitions, 2130 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:16,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:16,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:16,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:17,051 INFO L124 PetriNetUnfolderBase]: 658/1273 cut-off events. [2024-06-20 15:17:17,052 INFO L125 PetriNetUnfolderBase]: For 211875/211875 co-relation queries the response was YES. [2024-06-20 15:17:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9036 conditions, 1273 events. 658/1273 cut-off events. For 211875/211875 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7113 event pairs, 169 based on Foata normal form. 10/1280 useless extension candidates. Maximal degree in co-relation 8902. Up to 1000 conditions per place. [2024-06-20 15:17:17,063 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 162 selfloop transitions, 52 changer transitions 9/225 dead transitions. [2024-06-20 15:17:17,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 225 transitions, 2680 flow [2024-06-20 15:17:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 15:17:17,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-20 15:17:17,064 INFO L175 Difference]: Start difference. First operand has 280 places, 204 transitions, 2130 flow. Second operand 11 states and 125 transitions. [2024-06-20 15:17:17,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 225 transitions, 2680 flow [2024-06-20 15:17:17,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 225 transitions, 2500 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 15:17:17,791 INFO L231 Difference]: Finished difference. Result has 273 places, 201 transitions, 2039 flow [2024-06-20 15:17:17,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2039, PETRI_PLACES=273, PETRI_TRANSITIONS=201} [2024-06-20 15:17:17,804 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-20 15:17:17,804 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 201 transitions, 2039 flow [2024-06-20 15:17:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:17,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:17,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:17,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:17:17,807 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:17,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:17,808 INFO L85 PathProgramCache]: Analyzing trace with hash 705497610, now seen corresponding path program 15 times [2024-06-20 15:17:17,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:17,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152593051] [2024-06-20 15:17:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:17,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:18,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152593051] [2024-06-20 15:17:18,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152593051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:18,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:18,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:17:18,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060882700] [2024-06-20 15:17:18,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:18,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:17:18,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:17:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:17:19,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:19,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 201 transitions, 2039 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:19,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:19,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:19,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:19,490 INFO L124 PetriNetUnfolderBase]: 616/1195 cut-off events. [2024-06-20 15:17:19,501 INFO L125 PetriNetUnfolderBase]: For 156117/156117 co-relation queries the response was YES. [2024-06-20 15:17:19,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7362 conditions, 1195 events. 616/1195 cut-off events. For 156117/156117 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6626 event pairs, 272 based on Foata normal form. 12/1206 useless extension candidates. Maximal degree in co-relation 7232. Up to 1085 conditions per place. [2024-06-20 15:17:19,527 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 187 selfloop transitions, 23 changer transitions 5/217 dead transitions. [2024-06-20 15:17:19,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 217 transitions, 2547 flow [2024-06-20 15:17:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 15:17:19,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 15:17:19,529 INFO L175 Difference]: Start difference. First operand has 273 places, 201 transitions, 2039 flow. Second operand 10 states and 106 transitions. [2024-06-20 15:17:19,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 217 transitions, 2547 flow [2024-06-20 15:17:19,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 217 transitions, 2387 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-06-20 15:17:19,948 INFO L231 Difference]: Finished difference. Result has 270 places, 200 transitions, 1921 flow [2024-06-20 15:17:19,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1921, PETRI_PLACES=270, PETRI_TRANSITIONS=200} [2024-06-20 15:17:19,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-20 15:17:19,948 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 200 transitions, 1921 flow [2024-06-20 15:17:19,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:19,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:19,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:19,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:17:19,949 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:19,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1001793484, now seen corresponding path program 16 times [2024-06-20 15:17:19,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107184057] [2024-06-20 15:17:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:21,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:21,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107184057] [2024-06-20 15:17:21,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107184057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:21,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:21,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963517497] [2024-06-20 15:17:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:21,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:21,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 200 transitions, 1921 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:21,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:21,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:21,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:21,531 INFO L124 PetriNetUnfolderBase]: 620/1211 cut-off events. [2024-06-20 15:17:21,532 INFO L125 PetriNetUnfolderBase]: For 141106/141106 co-relation queries the response was YES. [2024-06-20 15:17:21,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7186 conditions, 1211 events. 620/1211 cut-off events. For 141106/141106 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6780 event pairs, 278 based on Foata normal form. 10/1220 useless extension candidates. Maximal degree in co-relation 7057. Up to 1069 conditions per place. [2024-06-20 15:17:21,542 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 15 changer transitions 19/217 dead transitions. [2024-06-20 15:17:21,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 217 transitions, 2431 flow [2024-06-20 15:17:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-20 15:17:21,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-20 15:17:21,544 INFO L175 Difference]: Start difference. First operand has 270 places, 200 transitions, 1921 flow. Second operand 11 states and 112 transitions. [2024-06-20 15:17:21,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 217 transitions, 2431 flow [2024-06-20 15:17:21,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 217 transitions, 2379 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:17:21,958 INFO L231 Difference]: Finished difference. Result has 272 places, 191 transitions, 1834 flow [2024-06-20 15:17:21,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1834, PETRI_PLACES=272, PETRI_TRANSITIONS=191} [2024-06-20 15:17:21,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2024-06-20 15:17:21,958 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 191 transitions, 1834 flow [2024-06-20 15:17:21,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:21,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:21,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:21,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:17:21,959 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:21,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:21,959 INFO L85 PathProgramCache]: Analyzing trace with hash 695380318, now seen corresponding path program 17 times [2024-06-20 15:17:21,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:21,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290105948] [2024-06-20 15:17:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:21,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:23,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290105948] [2024-06-20 15:17:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290105948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:23,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:23,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:23,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551232440] [2024-06-20 15:17:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:23,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:23,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:23,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 191 transitions, 1834 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:23,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:23,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:23,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:23,574 INFO L124 PetriNetUnfolderBase]: 578/1133 cut-off events. [2024-06-20 15:17:23,575 INFO L125 PetriNetUnfolderBase]: For 135813/135813 co-relation queries the response was YES. [2024-06-20 15:17:23,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6877 conditions, 1133 events. 578/1133 cut-off events. For 135813/135813 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6233 event pairs, 268 based on Foata normal form. 8/1140 useless extension candidates. Maximal degree in co-relation 6747. Up to 1031 conditions per place. [2024-06-20 15:17:23,585 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 173 selfloop transitions, 7 changer transitions 23/205 dead transitions. [2024-06-20 15:17:23,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 205 transitions, 2300 flow [2024-06-20 15:17:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-20 15:17:23,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-20 15:17:23,586 INFO L175 Difference]: Start difference. First operand has 272 places, 191 transitions, 1834 flow. Second operand 10 states and 98 transitions. [2024-06-20 15:17:23,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 205 transitions, 2300 flow [2024-06-20 15:17:24,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 205 transitions, 2252 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-20 15:17:24,009 INFO L231 Difference]: Finished difference. Result has 262 places, 178 transitions, 1710 flow [2024-06-20 15:17:24,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1710, PETRI_PLACES=262, PETRI_TRANSITIONS=178} [2024-06-20 15:17:24,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-20 15:17:24,009 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 178 transitions, 1710 flow [2024-06-20 15:17:24,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:24,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:24,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:24,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:17:24,010 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:24,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1823853536, now seen corresponding path program 26 times [2024-06-20 15:17:24,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:24,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622054992] [2024-06-20 15:17:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:24,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:25,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:25,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622054992] [2024-06-20 15:17:25,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622054992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:25,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:25,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:17:25,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526009516] [2024-06-20 15:17:25,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:25,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:17:25,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:25,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:17:25,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:17:25,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:25,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 178 transitions, 1710 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:25,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:25,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:25,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:26,125 INFO L124 PetriNetUnfolderBase]: 535/1044 cut-off events. [2024-06-20 15:17:26,126 INFO L125 PetriNetUnfolderBase]: For 97132/97132 co-relation queries the response was YES. [2024-06-20 15:17:26,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6199 conditions, 1044 events. 535/1044 cut-off events. For 97132/97132 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5582 event pairs, 156 based on Foata normal form. 2/1043 useless extension candidates. Maximal degree in co-relation 6086. Up to 684 conditions per place. [2024-06-20 15:17:26,135 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 125 selfloop transitions, 66 changer transitions 0/193 dead transitions. [2024-06-20 15:17:26,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 193 transitions, 2144 flow [2024-06-20 15:17:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 15:17:26,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-20 15:17:26,136 INFO L175 Difference]: Start difference. First operand has 262 places, 178 transitions, 1710 flow. Second operand 10 states and 111 transitions. [2024-06-20 15:17:26,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 193 transitions, 2144 flow [2024-06-20 15:17:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 193 transitions, 2105 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-20 15:17:26,508 INFO L231 Difference]: Finished difference. Result has 246 places, 178 transitions, 1807 flow [2024-06-20 15:17:26,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1807, PETRI_PLACES=246, PETRI_TRANSITIONS=178} [2024-06-20 15:17:26,509 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-20 15:17:26,509 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 178 transitions, 1807 flow [2024-06-20 15:17:26,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:26,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:26,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:26,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:17:26,510 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:26,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1236904068, now seen corresponding path program 18 times [2024-06-20 15:17:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:26,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307860343] [2024-06-20 15:17:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307860343] [2024-06-20 15:17:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307860343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:27,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:27,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668045071] [2024-06-20 15:17:27,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:27,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:27,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 178 transitions, 1807 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:27,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:27,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:27,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:28,214 INFO L124 PetriNetUnfolderBase]: 557/1090 cut-off events. [2024-06-20 15:17:28,215 INFO L125 PetriNetUnfolderBase]: For 110770/110770 co-relation queries the response was YES. [2024-06-20 15:17:28,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6354 conditions, 1090 events. 557/1090 cut-off events. For 110770/110770 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5907 event pairs, 140 based on Foata normal form. 10/1097 useless extension candidates. Maximal degree in co-relation 6248. Up to 826 conditions per place. [2024-06-20 15:17:28,223 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 137 selfloop transitions, 46 changer transitions 16/201 dead transitions. [2024-06-20 15:17:28,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 201 transitions, 2323 flow [2024-06-20 15:17:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-20 15:17:28,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 15:17:28,224 INFO L175 Difference]: Start difference. First operand has 246 places, 178 transitions, 1807 flow. Second operand 11 states and 121 transitions. [2024-06-20 15:17:28,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 201 transitions, 2323 flow [2024-06-20 15:17:28,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 201 transitions, 2128 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:28,600 INFO L231 Difference]: Finished difference. Result has 250 places, 174 transitions, 1687 flow [2024-06-20 15:17:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1687, PETRI_PLACES=250, PETRI_TRANSITIONS=174} [2024-06-20 15:17:28,601 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-20 15:17:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 174 transitions, 1687 flow [2024-06-20 15:17:28,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:28,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:28,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:28,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:17:28,602 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:28,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1236644598, now seen corresponding path program 19 times [2024-06-20 15:17:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:28,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643070102] [2024-06-20 15:17:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:28,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:29,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:29,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643070102] [2024-06-20 15:17:29,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643070102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:29,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:29,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:29,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144803030] [2024-06-20 15:17:29,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:29,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:29,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 174 transitions, 1687 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:29,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:29,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:29,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:30,372 INFO L124 PetriNetUnfolderBase]: 539/1060 cut-off events. [2024-06-20 15:17:30,372 INFO L125 PetriNetUnfolderBase]: For 111778/111778 co-relation queries the response was YES. [2024-06-20 15:17:30,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6052 conditions, 1060 events. 539/1060 cut-off events. For 111778/111778 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5709 event pairs, 142 based on Foata normal form. 10/1067 useless extension candidates. Maximal degree in co-relation 5944. Up to 811 conditions per place. [2024-06-20 15:17:30,381 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 134 selfloop transitions, 47 changer transitions 11/194 dead transitions. [2024-06-20 15:17:30,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 194 transitions, 2165 flow [2024-06-20 15:17:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-20 15:17:30,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-20 15:17:30,402 INFO L175 Difference]: Start difference. First operand has 250 places, 174 transitions, 1687 flow. Second operand 11 states and 118 transitions. [2024-06-20 15:17:30,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 194 transitions, 2165 flow [2024-06-20 15:17:30,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 194 transitions, 1987 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 15:17:30,668 INFO L231 Difference]: Finished difference. Result has 244 places, 171 transitions, 1586 flow [2024-06-20 15:17:30,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1586, PETRI_PLACES=244, PETRI_TRANSITIONS=171} [2024-06-20 15:17:30,669 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-20 15:17:30,669 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 171 transitions, 1586 flow [2024-06-20 15:17:30,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:30,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:30,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:30,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:17:30,670 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:30,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1236635298, now seen corresponding path program 20 times [2024-06-20 15:17:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:30,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907974977] [2024-06-20 15:17:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:32,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907974977] [2024-06-20 15:17:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907974977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:32,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:32,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:17:32,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51126137] [2024-06-20 15:17:32,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:32,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:17:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:17:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:17:32,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:32,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 171 transitions, 1586 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:32,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:32,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:32,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:32,792 INFO L124 PetriNetUnfolderBase]: 520/1027 cut-off events. [2024-06-20 15:17:32,792 INFO L125 PetriNetUnfolderBase]: For 93275/93275 co-relation queries the response was YES. [2024-06-20 15:17:32,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5619 conditions, 1027 events. 520/1027 cut-off events. For 93275/93275 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5531 event pairs, 135 based on Foata normal form. 8/1032 useless extension candidates. Maximal degree in co-relation 5514. Up to 776 conditions per place. [2024-06-20 15:17:32,800 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 132 selfloop transitions, 46 changer transitions 11/191 dead transitions. [2024-06-20 15:17:32,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 191 transitions, 2050 flow [2024-06-20 15:17:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 15:17:32,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-20 15:17:32,802 INFO L175 Difference]: Start difference. First operand has 244 places, 171 transitions, 1586 flow. Second operand 11 states and 117 transitions. [2024-06-20 15:17:32,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 191 transitions, 2050 flow [2024-06-20 15:17:33,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 191 transitions, 1952 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:17:33,085 INFO L231 Difference]: Finished difference. Result has 242 places, 167 transitions, 1560 flow [2024-06-20 15:17:33,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1560, PETRI_PLACES=242, PETRI_TRANSITIONS=167} [2024-06-20 15:17:33,086 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-20 15:17:33,086 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 167 transitions, 1560 flow [2024-06-20 15:17:33,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:33,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:33,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:33,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:17:33,087 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:33,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1780101011, now seen corresponding path program 1 times [2024-06-20 15:17:33,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:33,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081333274] [2024-06-20 15:17:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:33,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:34,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:34,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081333274] [2024-06-20 15:17:34,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081333274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:34,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:34,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:34,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415387995] [2024-06-20 15:17:34,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:34,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:34,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:35,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:35,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 167 transitions, 1560 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:35,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:35,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:35,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:35,376 INFO L124 PetriNetUnfolderBase]: 512/1011 cut-off events. [2024-06-20 15:17:35,377 INFO L125 PetriNetUnfolderBase]: For 85824/85824 co-relation queries the response was YES. [2024-06-20 15:17:35,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5504 conditions, 1011 events. 512/1011 cut-off events. For 85824/85824 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5419 event pairs, 135 based on Foata normal form. 6/1016 useless extension candidates. Maximal degree in co-relation 5400. Up to 840 conditions per place. [2024-06-20 15:17:35,385 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 152 selfloop transitions, 24 changer transitions 18/196 dead transitions. [2024-06-20 15:17:35,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 196 transitions, 2053 flow [2024-06-20 15:17:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-20 15:17:35,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-20 15:17:35,386 INFO L175 Difference]: Start difference. First operand has 242 places, 167 transitions, 1560 flow. Second operand 12 states and 125 transitions. [2024-06-20 15:17:35,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 196 transitions, 2053 flow [2024-06-20 15:17:35,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 196 transitions, 1953 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 15:17:35,592 INFO L231 Difference]: Finished difference. Result has 238 places, 163 transitions, 1479 flow [2024-06-20 15:17:35,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1479, PETRI_PLACES=238, PETRI_TRANSITIONS=163} [2024-06-20 15:17:35,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-20 15:17:35,593 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 163 transitions, 1479 flow [2024-06-20 15:17:35,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:35,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:35,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:35,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:17:35,593 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:35,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:35,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1784709277, now seen corresponding path program 2 times [2024-06-20 15:17:35,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:35,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513193600] [2024-06-20 15:17:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:35,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:37,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:37,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513193600] [2024-06-20 15:17:37,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513193600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:37,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:37,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:37,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110040035] [2024-06-20 15:17:37,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:37,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:37,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 163 transitions, 1479 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:37,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:37,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:37,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:37,960 INFO L124 PetriNetUnfolderBase]: 504/999 cut-off events. [2024-06-20 15:17:37,960 INFO L125 PetriNetUnfolderBase]: For 79554/79554 co-relation queries the response was YES. [2024-06-20 15:17:37,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5316 conditions, 999 events. 504/999 cut-off events. For 79554/79554 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5340 event pairs, 136 based on Foata normal form. 6/1004 useless extension candidates. Maximal degree in co-relation 5214. Up to 852 conditions per place. [2024-06-20 15:17:37,969 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 148 selfloop transitions, 25 changer transitions 17/192 dead transitions. [2024-06-20 15:17:37,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 192 transitions, 1966 flow [2024-06-20 15:17:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-20 15:17:37,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-20 15:17:37,970 INFO L175 Difference]: Start difference. First operand has 238 places, 163 transitions, 1479 flow. Second operand 12 states and 125 transitions. [2024-06-20 15:17:37,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 192 transitions, 1966 flow [2024-06-20 15:17:38,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 192 transitions, 1908 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:17:38,203 INFO L231 Difference]: Finished difference. Result has 236 places, 165 transitions, 1518 flow [2024-06-20 15:17:38,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1518, PETRI_PLACES=236, PETRI_TRANSITIONS=165} [2024-06-20 15:17:38,203 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-20 15:17:38,204 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 165 transitions, 1518 flow [2024-06-20 15:17:38,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:38,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:38,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:38,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:17:38,204 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:38,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1553505063, now seen corresponding path program 3 times [2024-06-20 15:17:38,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:38,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429872651] [2024-06-20 15:17:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:38,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:39,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429872651] [2024-06-20 15:17:39,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429872651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:39,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:39,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:39,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429472082] [2024-06-20 15:17:39,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:39,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:39,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:39,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:39,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:39,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:39,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 165 transitions, 1518 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:39,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:39,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:39,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:40,435 INFO L124 PetriNetUnfolderBase]: 507/1004 cut-off events. [2024-06-20 15:17:40,435 INFO L125 PetriNetUnfolderBase]: For 79638/79638 co-relation queries the response was YES. [2024-06-20 15:17:40,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5374 conditions, 1004 events. 507/1004 cut-off events. For 79638/79638 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5361 event pairs, 132 based on Foata normal form. 6/1009 useless extension candidates. Maximal degree in co-relation 5271. Up to 836 conditions per place. [2024-06-20 15:17:40,441 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 150 selfloop transitions, 34 changer transitions 11/197 dead transitions. [2024-06-20 15:17:40,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 197 transitions, 2041 flow [2024-06-20 15:17:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-20 15:17:40,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-20 15:17:40,443 INFO L175 Difference]: Start difference. First operand has 236 places, 165 transitions, 1518 flow. Second operand 12 states and 130 transitions. [2024-06-20 15:17:40,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 197 transitions, 2041 flow [2024-06-20 15:17:40,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 197 transitions, 1989 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 15:17:40,703 INFO L231 Difference]: Finished difference. Result has 238 places, 170 transitions, 1595 flow [2024-06-20 15:17:40,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1595, PETRI_PLACES=238, PETRI_TRANSITIONS=170} [2024-06-20 15:17:40,704 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-20 15:17:40,704 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 170 transitions, 1595 flow [2024-06-20 15:17:40,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:40,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:40,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:17:40,705 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:40,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1856931781, now seen corresponding path program 4 times [2024-06-20 15:17:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:40,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471504185] [2024-06-20 15:17:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:40,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:42,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:42,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471504185] [2024-06-20 15:17:42,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471504185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:42,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:42,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10510412] [2024-06-20 15:17:42,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:42,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:42,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:42,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:42,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 170 transitions, 1595 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:42,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:42,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:42,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:43,068 INFO L124 PetriNetUnfolderBase]: 502/997 cut-off events. [2024-06-20 15:17:43,068 INFO L125 PetriNetUnfolderBase]: For 86088/86088 co-relation queries the response was YES. [2024-06-20 15:17:43,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 997 events. 502/997 cut-off events. For 86088/86088 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5324 event pairs, 136 based on Foata normal form. 8/1004 useless extension candidates. Maximal degree in co-relation 5349. Up to 834 conditions per place. [2024-06-20 15:17:43,076 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 150 selfloop transitions, 34 changer transitions 7/193 dead transitions. [2024-06-20 15:17:43,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 193 transitions, 2084 flow [2024-06-20 15:17:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 15:17:43,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-20 15:17:43,077 INFO L175 Difference]: Start difference. First operand has 238 places, 170 transitions, 1595 flow. Second operand 11 states and 122 transitions. [2024-06-20 15:17:43,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 193 transitions, 2084 flow [2024-06-20 15:17:43,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 193 transitions, 2024 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:43,326 INFO L231 Difference]: Finished difference. Result has 241 places, 170 transitions, 1618 flow [2024-06-20 15:17:43,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1618, PETRI_PLACES=241, PETRI_TRANSITIONS=170} [2024-06-20 15:17:43,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-20 15:17:43,327 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 170 transitions, 1618 flow [2024-06-20 15:17:43,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:43,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:43,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:43,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:17:43,327 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:43,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:43,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1900173427, now seen corresponding path program 5 times [2024-06-20 15:17:43,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:43,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589014551] [2024-06-20 15:17:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:43,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:45,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:45,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589014551] [2024-06-20 15:17:45,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589014551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:45,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:45,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:45,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339862753] [2024-06-20 15:17:45,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:45,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:45,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:45,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:45,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 170 transitions, 1618 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:45,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:45,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:45,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:46,053 INFO L124 PetriNetUnfolderBase]: 493/982 cut-off events. [2024-06-20 15:17:46,053 INFO L125 PetriNetUnfolderBase]: For 79681/79681 co-relation queries the response was YES. [2024-06-20 15:17:46,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 982 events. 493/982 cut-off events. For 79681/79681 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5240 event pairs, 134 based on Foata normal form. 6/987 useless extension candidates. Maximal degree in co-relation 5273. Up to 830 conditions per place. [2024-06-20 15:17:46,061 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 147 selfloop transitions, 30 changer transitions 12/191 dead transitions. [2024-06-20 15:17:46,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 191 transitions, 2061 flow [2024-06-20 15:17:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-06-20 15:17:46,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 15:17:46,077 INFO L175 Difference]: Start difference. First operand has 241 places, 170 transitions, 1618 flow. Second operand 12 states and 126 transitions. [2024-06-20 15:17:46,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 191 transitions, 2061 flow [2024-06-20 15:17:46,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 191 transitions, 1985 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:17:46,303 INFO L231 Difference]: Finished difference. Result has 242 places, 166 transitions, 1564 flow [2024-06-20 15:17:46,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1564, PETRI_PLACES=242, PETRI_TRANSITIONS=166} [2024-06-20 15:17:46,304 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-20 15:17:46,304 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 166 transitions, 1564 flow [2024-06-20 15:17:46,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:46,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:46,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:46,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:17:46,305 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:46,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1895531797, now seen corresponding path program 6 times [2024-06-20 15:17:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:46,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343223296] [2024-06-20 15:17:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:46,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343223296] [2024-06-20 15:17:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343223296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:48,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:48,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393410560] [2024-06-20 15:17:48,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:48,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:48,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:48,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 166 transitions, 1564 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:48,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:48,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:48,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:48,671 INFO L124 PetriNetUnfolderBase]: 497/990 cut-off events. [2024-06-20 15:17:48,671 INFO L125 PetriNetUnfolderBase]: For 79745/79745 co-relation queries the response was YES. [2024-06-20 15:17:48,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5349 conditions, 990 events. 497/990 cut-off events. For 79745/79745 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5293 event pairs, 140 based on Foata normal form. 6/995 useless extension candidates. Maximal degree in co-relation 5245. Up to 837 conditions per place. [2024-06-20 15:17:48,679 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 144 selfloop transitions, 23 changer transitions 22/191 dead transitions. [2024-06-20 15:17:48,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 191 transitions, 2016 flow [2024-06-20 15:17:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-06-20 15:17:48,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 15:17:48,680 INFO L175 Difference]: Start difference. First operand has 242 places, 166 transitions, 1564 flow. Second operand 12 states and 126 transitions. [2024-06-20 15:17:48,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 191 transitions, 2016 flow [2024-06-20 15:17:48,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 191 transitions, 1944 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:17:48,940 INFO L231 Difference]: Finished difference. Result has 241 places, 159 transitions, 1465 flow [2024-06-20 15:17:48,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1465, PETRI_PLACES=241, PETRI_TRANSITIONS=159} [2024-06-20 15:17:48,940 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-20 15:17:48,940 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 159 transitions, 1465 flow [2024-06-20 15:17:48,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:48,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:48,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:48,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:17:48,941 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:48,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1631707303, now seen corresponding path program 7 times [2024-06-20 15:17:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:48,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976606391] [2024-06-20 15:17:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:48,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:50,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:50,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976606391] [2024-06-20 15:17:50,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976606391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:50,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:50,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830598958] [2024-06-20 15:17:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:50,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:50,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 159 transitions, 1465 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:50,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:50,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:50,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:50,858 INFO L124 PetriNetUnfolderBase]: 490/979 cut-off events. [2024-06-20 15:17:50,858 INFO L125 PetriNetUnfolderBase]: For 79396/79396 co-relation queries the response was YES. [2024-06-20 15:17:50,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5216 conditions, 979 events. 490/979 cut-off events. For 79396/79396 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5225 event pairs, 100 based on Foata normal form. 6/984 useless extension candidates. Maximal degree in co-relation 5111. Up to 778 conditions per place. [2024-06-20 15:17:50,865 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 140 selfloop transitions, 21 changer transitions 24/187 dead transitions. [2024-06-20 15:17:50,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 187 transitions, 1915 flow [2024-06-20 15:17:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2024-06-20 15:17:50,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31989247311827956 [2024-06-20 15:17:50,866 INFO L175 Difference]: Start difference. First operand has 241 places, 159 transitions, 1465 flow. Second operand 12 states and 119 transitions. [2024-06-20 15:17:50,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 187 transitions, 1915 flow [2024-06-20 15:17:51,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 187 transitions, 1843 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-20 15:17:51,110 INFO L231 Difference]: Finished difference. Result has 240 places, 156 transitions, 1418 flow [2024-06-20 15:17:51,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1418, PETRI_PLACES=240, PETRI_TRANSITIONS=156} [2024-06-20 15:17:51,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-20 15:17:51,111 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 156 transitions, 1418 flow [2024-06-20 15:17:51,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:51,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:51,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:51,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:17:51,112 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:51,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1191512417, now seen corresponding path program 8 times [2024-06-20 15:17:51,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:51,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444956208] [2024-06-20 15:17:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:51,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444956208] [2024-06-20 15:17:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444956208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:52,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:52,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263523150] [2024-06-20 15:17:52,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:52,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:52,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:52,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:52,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 156 transitions, 1418 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:52,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:52,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:52,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:53,149 INFO L124 PetriNetUnfolderBase]: 481/964 cut-off events. [2024-06-20 15:17:53,149 INFO L125 PetriNetUnfolderBase]: For 79358/79358 co-relation queries the response was YES. [2024-06-20 15:17:53,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5164 conditions, 964 events. 481/964 cut-off events. For 79358/79358 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5146 event pairs, 122 based on Foata normal form. 6/969 useless extension candidates. Maximal degree in co-relation 5060. Up to 814 conditions per place. [2024-06-20 15:17:53,157 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 142 selfloop transitions, 18 changer transitions 22/184 dead transitions. [2024-06-20 15:17:53,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 184 transitions, 1881 flow [2024-06-20 15:17:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-20 15:17:53,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-20 15:17:53,158 INFO L175 Difference]: Start difference. First operand has 240 places, 156 transitions, 1418 flow. Second operand 12 states and 124 transitions. [2024-06-20 15:17:53,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 184 transitions, 1881 flow [2024-06-20 15:17:53,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 184 transitions, 1814 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-20 15:17:53,383 INFO L231 Difference]: Finished difference. Result has 237 places, 154 transitions, 1380 flow [2024-06-20 15:17:53,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1380, PETRI_PLACES=237, PETRI_TRANSITIONS=154} [2024-06-20 15:17:53,384 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-20 15:17:53,384 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 154 transitions, 1380 flow [2024-06-20 15:17:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:53,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:53,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:53,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:17:53,384 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:53,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1076221247, now seen corresponding path program 9 times [2024-06-20 15:17:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288211908] [2024-06-20 15:17:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:54,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:54,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288211908] [2024-06-20 15:17:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288211908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:54,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104658480] [2024-06-20 15:17:54,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:54,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:54,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:55,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:55,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 154 transitions, 1380 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:55,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:55,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:55,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:55,587 INFO L124 PetriNetUnfolderBase]: 512/1023 cut-off events. [2024-06-20 15:17:55,587 INFO L125 PetriNetUnfolderBase]: For 121097/121097 co-relation queries the response was YES. [2024-06-20 15:17:55,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6397 conditions, 1023 events. 512/1023 cut-off events. For 121097/121097 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5562 event pairs, 143 based on Foata normal form. 6/1028 useless extension candidates. Maximal degree in co-relation 6295. Up to 770 conditions per place. [2024-06-20 15:17:55,596 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 152 selfloop transitions, 26 changer transitions 9/189 dead transitions. [2024-06-20 15:17:55,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 189 transitions, 2092 flow [2024-06-20 15:17:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 15:17:55,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-20 15:17:55,597 INFO L175 Difference]: Start difference. First operand has 237 places, 154 transitions, 1380 flow. Second operand 11 states and 122 transitions. [2024-06-20 15:17:55,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 189 transitions, 2092 flow [2024-06-20 15:17:55,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 189 transitions, 2045 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:17:55,942 INFO L231 Difference]: Finished difference. Result has 235 places, 158 transitions, 1453 flow [2024-06-20 15:17:55,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1453, PETRI_PLACES=235, PETRI_TRANSITIONS=158} [2024-06-20 15:17:55,943 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-20 15:17:55,943 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 158 transitions, 1453 flow [2024-06-20 15:17:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:55,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:55,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:17:55,943 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:55,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -73536505, now seen corresponding path program 10 times [2024-06-20 15:17:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566163617] [2024-06-20 15:17:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:57,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:57,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566163617] [2024-06-20 15:17:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566163617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:57,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:57,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:57,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980712707] [2024-06-20 15:17:57,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:57,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:57,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:17:57,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:17:57,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 158 transitions, 1453 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:57,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:57,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:17:57,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:58,016 INFO L124 PetriNetUnfolderBase]: 500/1004 cut-off events. [2024-06-20 15:17:58,016 INFO L125 PetriNetUnfolderBase]: For 121280/121280 co-relation queries the response was YES. [2024-06-20 15:17:58,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6359 conditions, 1004 events. 500/1004 cut-off events. For 121280/121280 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5434 event pairs, 142 based on Foata normal form. 6/1009 useless extension candidates. Maximal degree in co-relation 6258. Up to 866 conditions per place. [2024-06-20 15:17:58,026 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 140 selfloop transitions, 27 changer transitions 11/180 dead transitions. [2024-06-20 15:17:58,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 180 transitions, 1880 flow [2024-06-20 15:17:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-20 15:17:58,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-20 15:17:58,027 INFO L175 Difference]: Start difference. First operand has 235 places, 158 transitions, 1453 flow. Second operand 12 states and 124 transitions. [2024-06-20 15:17:58,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 180 transitions, 1880 flow [2024-06-20 15:17:58,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 180 transitions, 1836 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:58,414 INFO L231 Difference]: Finished difference. Result has 239 places, 156 transitions, 1447 flow [2024-06-20 15:17:58,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1447, PETRI_PLACES=239, PETRI_TRANSITIONS=156} [2024-06-20 15:17:58,415 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-20 15:17:58,415 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 156 transitions, 1447 flow [2024-06-20 15:17:58,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:58,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:58,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:58,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:17:58,415 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:17:58,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash -310211915, now seen corresponding path program 11 times [2024-06-20 15:17:58,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:58,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255104961] [2024-06-20 15:17:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:59,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255104961] [2024-06-20 15:17:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255104961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:59,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:59,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:17:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253950365] [2024-06-20 15:17:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:59,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:17:59,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:59,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:17:59,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:00,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:00,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 156 transitions, 1447 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:00,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:00,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:00,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:00,483 INFO L124 PetriNetUnfolderBase]: 502/1009 cut-off events. [2024-06-20 15:18:00,483 INFO L125 PetriNetUnfolderBase]: For 121295/121295 co-relation queries the response was YES. [2024-06-20 15:18:00,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6378 conditions, 1009 events. 502/1009 cut-off events. For 121295/121295 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5502 event pairs, 145 based on Foata normal form. 6/1014 useless extension candidates. Maximal degree in co-relation 6277. Up to 876 conditions per place. [2024-06-20 15:18:00,491 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 140 selfloop transitions, 22 changer transitions 14/178 dead transitions. [2024-06-20 15:18:00,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 178 transitions, 1868 flow [2024-06-20 15:18:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-20 15:18:00,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343108504398827 [2024-06-20 15:18:00,498 INFO L175 Difference]: Start difference. First operand has 239 places, 156 transitions, 1447 flow. Second operand 11 states and 114 transitions. [2024-06-20 15:18:00,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 178 transitions, 1868 flow [2024-06-20 15:18:00,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 178 transitions, 1810 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:18:00,817 INFO L231 Difference]: Finished difference. Result has 241 places, 154 transitions, 1417 flow [2024-06-20 15:18:00,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1417, PETRI_PLACES=241, PETRI_TRANSITIONS=154} [2024-06-20 15:18:00,818 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-20 15:18:00,818 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 154 transitions, 1417 flow [2024-06-20 15:18:00,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:00,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:00,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:00,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:18:00,818 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:00,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1076041757, now seen corresponding path program 12 times [2024-06-20 15:18:00,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:00,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082725377] [2024-06-20 15:18:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:00,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:02,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082725377] [2024-06-20 15:18:02,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082725377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:02,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:02,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038912734] [2024-06-20 15:18:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:02,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:02,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:02,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 154 transitions, 1417 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:02,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:02,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:02,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:03,514 INFO L124 PetriNetUnfolderBase]: 461/930 cut-off events. [2024-06-20 15:18:03,514 INFO L125 PetriNetUnfolderBase]: For 103301/103301 co-relation queries the response was YES. [2024-06-20 15:18:03,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5062 conditions, 930 events. 461/930 cut-off events. For 103301/103301 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4990 event pairs, 126 based on Foata normal form. 14/943 useless extension candidates. Maximal degree in co-relation 4960. Up to 748 conditions per place. [2024-06-20 15:18:03,521 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 133 selfloop transitions, 15 changer transitions 29/179 dead transitions. [2024-06-20 15:18:03,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 179 transitions, 1886 flow [2024-06-20 15:18:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:18:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:18:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 123 transitions. [2024-06-20 15:18:03,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33064516129032256 [2024-06-20 15:18:03,522 INFO L175 Difference]: Start difference. First operand has 241 places, 154 transitions, 1417 flow. Second operand 12 states and 123 transitions. [2024-06-20 15:18:03,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 179 transitions, 1886 flow [2024-06-20 15:18:03,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 179 transitions, 1847 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:18:03,687 INFO L231 Difference]: Finished difference. Result has 243 places, 143 transitions, 1256 flow [2024-06-20 15:18:03,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1256, PETRI_PLACES=243, PETRI_TRANSITIONS=143} [2024-06-20 15:18:03,688 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-20 15:18:03,688 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 143 transitions, 1256 flow [2024-06-20 15:18:03,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:03,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:03,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:03,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:18:03,689 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:03,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:03,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1643617909, now seen corresponding path program 13 times [2024-06-20 15:18:03,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:03,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333489510] [2024-06-20 15:18:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:03,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:05,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333489510] [2024-06-20 15:18:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333489510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:05,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822753119] [2024-06-20 15:18:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:05,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:05,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:05,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:05,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:05,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 143 transitions, 1256 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:05,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:05,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:05,820 INFO L124 PetriNetUnfolderBase]: 400/800 cut-off events. [2024-06-20 15:18:05,820 INFO L125 PetriNetUnfolderBase]: For 61136/61136 co-relation queries the response was YES. [2024-06-20 15:18:05,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4041 conditions, 800 events. 400/800 cut-off events. For 61136/61136 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4086 event pairs, 101 based on Foata normal form. 6/805 useless extension candidates. Maximal degree in co-relation 3939. Up to 671 conditions per place. [2024-06-20 15:18:05,826 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 128 selfloop transitions, 23 changer transitions 11/164 dead transitions. [2024-06-20 15:18:05,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 164 transitions, 1648 flow [2024-06-20 15:18:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:18:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:18:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2024-06-20 15:18:05,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3279569892473118 [2024-06-20 15:18:05,827 INFO L175 Difference]: Start difference. First operand has 243 places, 143 transitions, 1256 flow. Second operand 12 states and 122 transitions. [2024-06-20 15:18:05,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 164 transitions, 1648 flow [2024-06-20 15:18:05,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 164 transitions, 1566 flow, removed 11 selfloop flow, removed 17 redundant places. [2024-06-20 15:18:05,968 INFO L231 Difference]: Finished difference. Result has 228 places, 140 transitions, 1200 flow [2024-06-20 15:18:05,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1200, PETRI_PLACES=228, PETRI_TRANSITIONS=140} [2024-06-20 15:18:05,978 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2024-06-20 15:18:05,978 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 140 transitions, 1200 flow [2024-06-20 15:18:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:05,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:05,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:05,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:18:05,979 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:05,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1643444929, now seen corresponding path program 14 times [2024-06-20 15:18:05,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:05,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527069054] [2024-06-20 15:18:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:05,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527069054] [2024-06-20 15:18:07,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527069054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:07,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:07,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483392242] [2024-06-20 15:18:07,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:07,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:07,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:07,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:07,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:07,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:07,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 140 transitions, 1200 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:07,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:07,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:07,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:08,172 INFO L124 PetriNetUnfolderBase]: 390/782 cut-off events. [2024-06-20 15:18:08,172 INFO L125 PetriNetUnfolderBase]: For 60959/60959 co-relation queries the response was YES. [2024-06-20 15:18:08,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 782 events. 390/782 cut-off events. For 60959/60959 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3983 event pairs, 99 based on Foata normal form. 6/787 useless extension candidates. Maximal degree in co-relation 3840. Up to 653 conditions per place. [2024-06-20 15:18:08,180 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 124 selfloop transitions, 20 changer transitions 15/161 dead transitions. [2024-06-20 15:18:08,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 161 transitions, 1582 flow [2024-06-20 15:18:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:18:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:18:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-06-20 15:18:08,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32526881720430106 [2024-06-20 15:18:08,182 INFO L175 Difference]: Start difference. First operand has 228 places, 140 transitions, 1200 flow. Second operand 12 states and 121 transitions. [2024-06-20 15:18:08,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 161 transitions, 1582 flow [2024-06-20 15:18:08,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 161 transitions, 1532 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:08,369 INFO L231 Difference]: Finished difference. Result has 224 places, 135 transitions, 1145 flow [2024-06-20 15:18:08,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1145, PETRI_PLACES=224, PETRI_TRANSITIONS=135} [2024-06-20 15:18:08,370 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-20 15:18:08,370 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 135 transitions, 1145 flow [2024-06-20 15:18:08,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:08,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:08,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:08,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:18:08,370 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:08,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash -239943265, now seen corresponding path program 15 times [2024-06-20 15:18:08,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:08,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577040420] [2024-06-20 15:18:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:08,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:09,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:09,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577040420] [2024-06-20 15:18:09,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577040420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:09,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:09,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465600636] [2024-06-20 15:18:09,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:09,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:09,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:09,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:09,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 135 transitions, 1145 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:09,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:09,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:09,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:10,377 INFO L124 PetriNetUnfolderBase]: 385/771 cut-off events. [2024-06-20 15:18:10,377 INFO L125 PetriNetUnfolderBase]: For 59386/59386 co-relation queries the response was YES. [2024-06-20 15:18:10,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3848 conditions, 771 events. 385/771 cut-off events. For 59386/59386 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3896 event pairs, 99 based on Foata normal form. 6/776 useless extension candidates. Maximal degree in co-relation 3752. Up to 651 conditions per place. [2024-06-20 15:18:10,382 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 122 selfloop transitions, 19 changer transitions 14/157 dead transitions. [2024-06-20 15:18:10,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 157 transitions, 1520 flow [2024-06-20 15:18:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:18:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:18:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2024-06-20 15:18:10,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3172043010752688 [2024-06-20 15:18:10,383 INFO L175 Difference]: Start difference. First operand has 224 places, 135 transitions, 1145 flow. Second operand 12 states and 118 transitions. [2024-06-20 15:18:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 157 transitions, 1520 flow [2024-06-20 15:18:10,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 157 transitions, 1474 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:10,542 INFO L231 Difference]: Finished difference. Result has 220 places, 133 transitions, 1126 flow [2024-06-20 15:18:10,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1126, PETRI_PLACES=220, PETRI_TRANSITIONS=133} [2024-06-20 15:18:10,543 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-20 15:18:10,543 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 133 transitions, 1126 flow [2024-06-20 15:18:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:10,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:10,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:10,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:18:10,544 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:10,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash -244411915, now seen corresponding path program 16 times [2024-06-20 15:18:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:10,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864708689] [2024-06-20 15:18:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:10,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:12,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:12,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864708689] [2024-06-20 15:18:12,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864708689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:12,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:12,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:12,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890537752] [2024-06-20 15:18:12,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:12,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:12,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:12,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:12,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:12,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 133 transitions, 1126 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:12,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:12,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:12,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:12,703 INFO L124 PetriNetUnfolderBase]: 383/769 cut-off events. [2024-06-20 15:18:12,703 INFO L125 PetriNetUnfolderBase]: For 59352/59352 co-relation queries the response was YES. [2024-06-20 15:18:12,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3822 conditions, 769 events. 383/769 cut-off events. For 59352/59352 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3889 event pairs, 99 based on Foata normal form. 6/774 useless extension candidates. Maximal degree in co-relation 3726. Up to 649 conditions per place. [2024-06-20 15:18:12,708 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 14 changer transitions 25/156 dead transitions. [2024-06-20 15:18:12,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 156 transitions, 1499 flow [2024-06-20 15:18:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:18:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:18:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2024-06-20 15:18:12,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31451612903225806 [2024-06-20 15:18:12,709 INFO L175 Difference]: Start difference. First operand has 220 places, 133 transitions, 1126 flow. Second operand 12 states and 117 transitions. [2024-06-20 15:18:12,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 156 transitions, 1499 flow [2024-06-20 15:18:12,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 156 transitions, 1444 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:18:12,866 INFO L231 Difference]: Finished difference. Result has 219 places, 127 transitions, 1035 flow [2024-06-20 15:18:12,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1035, PETRI_PLACES=219, PETRI_TRANSITIONS=127} [2024-06-20 15:18:12,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-20 15:18:12,867 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 127 transitions, 1035 flow [2024-06-20 15:18:12,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:12,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:12,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:12,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:18:12,868 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:12,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1033656811, now seen corresponding path program 17 times [2024-06-20 15:18:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:12,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57622652] [2024-06-20 15:18:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:12,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:14,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:14,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57622652] [2024-06-20 15:18:14,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57622652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:14,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:14,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:14,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954617630] [2024-06-20 15:18:14,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:14,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:14,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:14,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:14,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 127 transitions, 1035 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:14,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:14,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:14,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:15,006 INFO L124 PetriNetUnfolderBase]: 363/717 cut-off events. [2024-06-20 15:18:15,007 INFO L125 PetriNetUnfolderBase]: For 59126/59126 co-relation queries the response was YES. [2024-06-20 15:18:15,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 717 events. 363/717 cut-off events. For 59126/59126 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3550 event pairs, 65 based on Foata normal form. 6/722 useless extension candidates. Maximal degree in co-relation 3514. Up to 591 conditions per place. [2024-06-20 15:18:15,012 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 111 selfloop transitions, 14 changer transitions 18/145 dead transitions. [2024-06-20 15:18:15,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 145 transitions, 1365 flow [2024-06-20 15:18:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-20 15:18:15,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085043988269795 [2024-06-20 15:18:15,013 INFO L175 Difference]: Start difference. First operand has 219 places, 127 transitions, 1035 flow. Second operand 11 states and 106 transitions. [2024-06-20 15:18:15,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 145 transitions, 1365 flow [2024-06-20 15:18:15,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 145 transitions, 1264 flow, removed 10 selfloop flow, removed 18 redundant places. [2024-06-20 15:18:15,152 INFO L231 Difference]: Finished difference. Result has 201 places, 122 transitions, 942 flow [2024-06-20 15:18:15,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=942, PETRI_PLACES=201, PETRI_TRANSITIONS=122} [2024-06-20 15:18:15,153 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-20 15:18:15,153 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 122 transitions, 942 flow [2024-06-20 15:18:15,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:15,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:15,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:18:15,153 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:15,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1468679961, now seen corresponding path program 18 times [2024-06-20 15:18:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:15,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229141158] [2024-06-20 15:18:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:15,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:16,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:16,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229141158] [2024-06-20 15:18:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229141158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:16,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:16,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:16,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469150066] [2024-06-20 15:18:16,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:16,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:16,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:16,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:16,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:17,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:17,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 122 transitions, 942 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:17,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:17,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:17,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:17,485 INFO L124 PetriNetUnfolderBase]: 343/681 cut-off events. [2024-06-20 15:18:17,485 INFO L125 PetriNetUnfolderBase]: For 58853/58853 co-relation queries the response was YES. [2024-06-20 15:18:17,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3435 conditions, 681 events. 343/681 cut-off events. For 58853/58853 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3325 event pairs, 80 based on Foata normal form. 6/686 useless extension candidates. Maximal degree in co-relation 3346. Up to 579 conditions per place. [2024-06-20 15:18:17,490 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 104 selfloop transitions, 15 changer transitions 18/139 dead transitions. [2024-06-20 15:18:17,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 139 transitions, 1258 flow [2024-06-20 15:18:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-20 15:18:17,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-20 15:18:17,491 INFO L175 Difference]: Start difference. First operand has 201 places, 122 transitions, 942 flow. Second operand 11 states and 108 transitions. [2024-06-20 15:18:17,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 139 transitions, 1258 flow [2024-06-20 15:18:17,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 139 transitions, 1211 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:18:17,612 INFO L231 Difference]: Finished difference. Result has 192 places, 117 transitions, 902 flow [2024-06-20 15:18:17,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=902, PETRI_PLACES=192, PETRI_TRANSITIONS=117} [2024-06-20 15:18:17,612 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-20 15:18:17,612 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 117 transitions, 902 flow [2024-06-20 15:18:17,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:17,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:17,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:17,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:18:17,613 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:17,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1583971131, now seen corresponding path program 19 times [2024-06-20 15:18:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:17,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232486777] [2024-06-20 15:18:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:17,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:19,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232486777] [2024-06-20 15:18:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232486777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:19,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:19,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:19,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301711487] [2024-06-20 15:18:19,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:19,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:19,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:19,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:19,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:19,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 117 transitions, 902 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:19,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:19,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:19,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:19,600 INFO L124 PetriNetUnfolderBase]: 347/693 cut-off events. [2024-06-20 15:18:19,600 INFO L125 PetriNetUnfolderBase]: For 74055/74055 co-relation queries the response was YES. [2024-06-20 15:18:19,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 693 events. 347/693 cut-off events. For 74055/74055 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3411 event pairs, 88 based on Foata normal form. 6/698 useless extension candidates. Maximal degree in co-relation 3929. Up to 513 conditions per place. [2024-06-20 15:18:19,605 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 100 selfloop transitions, 24 changer transitions 10/136 dead transitions. [2024-06-20 15:18:19,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 136 transitions, 1396 flow [2024-06-20 15:18:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:18:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:18:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 15:18:19,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-20 15:18:19,606 INFO L175 Difference]: Start difference. First operand has 192 places, 117 transitions, 902 flow. Second operand 10 states and 111 transitions. [2024-06-20 15:18:19,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 136 transitions, 1396 flow [2024-06-20 15:18:19,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 136 transitions, 1346 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:19,730 INFO L231 Difference]: Finished difference. Result has 183 places, 113 transitions, 882 flow [2024-06-20 15:18:19,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=882, PETRI_PLACES=183, PETRI_TRANSITIONS=113} [2024-06-20 15:18:19,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-20 15:18:19,731 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 113 transitions, 882 flow [2024-06-20 15:18:19,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:19,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:19,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:19,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:18:19,731 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:19,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1584150621, now seen corresponding path program 20 times [2024-06-20 15:18:19,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:19,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598199567] [2024-06-20 15:18:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:21,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:21,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598199567] [2024-06-20 15:18:21,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598199567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:21,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:21,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:21,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717766787] [2024-06-20 15:18:21,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:21,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:21,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:21,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 113 transitions, 882 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:21,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:21,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:21,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:21,699 INFO L124 PetriNetUnfolderBase]: 332/668 cut-off events. [2024-06-20 15:18:21,700 INFO L125 PetriNetUnfolderBase]: For 65568/65568 co-relation queries the response was YES. [2024-06-20 15:18:21,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3699 conditions, 668 events. 332/668 cut-off events. For 65568/65568 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3257 event pairs, 93 based on Foata normal form. 8/675 useless extension candidates. Maximal degree in co-relation 3619. Up to 556 conditions per place. [2024-06-20 15:18:21,704 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 93 selfloop transitions, 23 changer transitions 11/129 dead transitions. [2024-06-20 15:18:21,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 129 transitions, 1208 flow [2024-06-20 15:18:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-20 15:18:21,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-20 15:18:21,705 INFO L175 Difference]: Start difference. First operand has 183 places, 113 transitions, 882 flow. Second operand 11 states and 111 transitions. [2024-06-20 15:18:21,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 129 transitions, 1208 flow [2024-06-20 15:18:21,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 129 transitions, 1157 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:21,813 INFO L231 Difference]: Finished difference. Result has 181 places, 110 transitions, 858 flow [2024-06-20 15:18:21,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=858, PETRI_PLACES=181, PETRI_TRANSITIONS=110} [2024-06-20 15:18:21,813 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-20 15:18:21,813 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 110 transitions, 858 flow [2024-06-20 15:18:21,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:21,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:21,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:18:21,814 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:21,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1579502481, now seen corresponding path program 21 times [2024-06-20 15:18:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483569429] [2024-06-20 15:18:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483569429] [2024-06-20 15:18:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483569429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:23,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483712167] [2024-06-20 15:18:23,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:23,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:23,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:23,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:23,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 110 transitions, 858 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:23,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:23,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:23,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:23,650 INFO L124 PetriNetUnfolderBase]: 323/653 cut-off events. [2024-06-20 15:18:23,650 INFO L125 PetriNetUnfolderBase]: For 57729/57729 co-relation queries the response was YES. [2024-06-20 15:18:23,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3559 conditions, 653 events. 323/653 cut-off events. For 57729/57729 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3185 event pairs, 85 based on Foata normal form. 6/658 useless extension candidates. Maximal degree in co-relation 3481. Up to 545 conditions per place. [2024-06-20 15:18:23,655 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 90 selfloop transitions, 18 changer transitions 15/125 dead transitions. [2024-06-20 15:18:23,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 125 transitions, 1146 flow [2024-06-20 15:18:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:18:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:18:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-20 15:18:23,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32903225806451614 [2024-06-20 15:18:23,656 INFO L175 Difference]: Start difference. First operand has 181 places, 110 transitions, 858 flow. Second operand 10 states and 102 transitions. [2024-06-20 15:18:23,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 125 transitions, 1146 flow [2024-06-20 15:18:23,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 125 transitions, 1092 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:23,770 INFO L231 Difference]: Finished difference. Result has 178 places, 105 transitions, 814 flow [2024-06-20 15:18:23,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=814, PETRI_PLACES=178, PETRI_TRANSITIONS=105} [2024-06-20 15:18:23,770 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-20 15:18:23,771 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 105 transitions, 814 flow [2024-06-20 15:18:23,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:23,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:23,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:23,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:18:23,771 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:23,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1584144111, now seen corresponding path program 22 times [2024-06-20 15:18:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:23,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725152802] [2024-06-20 15:18:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:25,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725152802] [2024-06-20 15:18:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725152802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:25,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505161631] [2024-06-20 15:18:25,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:25,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:25,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:25,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 105 transitions, 814 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:25,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:25,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:25,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:25,816 INFO L124 PetriNetUnfolderBase]: 292/592 cut-off events. [2024-06-20 15:18:25,817 INFO L125 PetriNetUnfolderBase]: For 43299/43299 co-relation queries the response was YES. [2024-06-20 15:18:25,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2958 conditions, 592 events. 292/592 cut-off events. For 43299/43299 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2806 event pairs, 78 based on Foata normal form. 6/597 useless extension candidates. Maximal degree in co-relation 2881. Up to 485 conditions per place. [2024-06-20 15:18:25,820 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 85 selfloop transitions, 15 changer transitions 17/119 dead transitions. [2024-06-20 15:18:25,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 119 transitions, 1090 flow [2024-06-20 15:18:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:18:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:18:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-06-20 15:18:25,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3258064516129032 [2024-06-20 15:18:25,821 INFO L175 Difference]: Start difference. First operand has 178 places, 105 transitions, 814 flow. Second operand 10 states and 101 transitions. [2024-06-20 15:18:25,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 119 transitions, 1090 flow [2024-06-20 15:18:25,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 119 transitions, 1036 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:18:25,901 INFO L231 Difference]: Finished difference. Result has 171 places, 96 transitions, 730 flow [2024-06-20 15:18:25,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=730, PETRI_PLACES=171, PETRI_TRANSITIONS=96} [2024-06-20 15:18:25,902 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-20 15:18:25,902 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 96 transitions, 730 flow [2024-06-20 15:18:25,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:25,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:25,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:25,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:18:25,902 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:25,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 111421209, now seen corresponding path program 23 times [2024-06-20 15:18:25,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:25,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061210827] [2024-06-20 15:18:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:25,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061210827] [2024-06-20 15:18:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061210827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:27,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:27,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91238090] [2024-06-20 15:18:27,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:27,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:27,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:27,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 96 transitions, 730 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:27,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:27,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:27,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:27,909 INFO L124 PetriNetUnfolderBase]: 265/531 cut-off events. [2024-06-20 15:18:27,910 INFO L125 PetriNetUnfolderBase]: For 39236/39236 co-relation queries the response was YES. [2024-06-20 15:18:27,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 531 events. 265/531 cut-off events. For 39236/39236 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2430 event pairs, 66 based on Foata normal form. 6/536 useless extension candidates. Maximal degree in co-relation 2583. Up to 447 conditions per place. [2024-06-20 15:18:27,912 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 82 selfloop transitions, 11 changer transitions 15/110 dead transitions. [2024-06-20 15:18:27,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 110 transitions, 978 flow [2024-06-20 15:18:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:18:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:18:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-06-20 15:18:27,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096774193548387 [2024-06-20 15:18:27,913 INFO L175 Difference]: Start difference. First operand has 171 places, 96 transitions, 730 flow. Second operand 10 states and 96 transitions. [2024-06-20 15:18:27,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 110 transitions, 978 flow [2024-06-20 15:18:27,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 110 transitions, 901 flow, removed 6 selfloop flow, removed 18 redundant places. [2024-06-20 15:18:27,982 INFO L231 Difference]: Finished difference. Result has 158 places, 91 transitions, 653 flow [2024-06-20 15:18:27,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=653, PETRI_PLACES=158, PETRI_TRANSITIONS=91} [2024-06-20 15:18:27,982 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-20 15:18:27,982 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 91 transitions, 653 flow [2024-06-20 15:18:27,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:27,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:27,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:27,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:18:27,983 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:27,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1348415761, now seen corresponding path program 24 times [2024-06-20 15:18:27,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:27,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608578982] [2024-06-20 15:18:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608578982] [2024-06-20 15:18:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608578982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:29,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284290828] [2024-06-20 15:18:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:29,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:29,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:29,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 91 transitions, 653 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:29,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:29,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:29,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:30,128 INFO L124 PetriNetUnfolderBase]: 247/497 cut-off events. [2024-06-20 15:18:30,128 INFO L125 PetriNetUnfolderBase]: For 34337/34337 co-relation queries the response was YES. [2024-06-20 15:18:30,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2442 conditions, 497 events. 247/497 cut-off events. For 34337/34337 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2217 event pairs, 57 based on Foata normal form. 6/502 useless extension candidates. Maximal degree in co-relation 2374. Up to 363 conditions per place. [2024-06-20 15:18:30,131 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 72 selfloop transitions, 23 changer transitions 11/108 dead transitions. [2024-06-20 15:18:30,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 108 transitions, 911 flow [2024-06-20 15:18:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-20 15:18:30,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-20 15:18:30,132 INFO L175 Difference]: Start difference. First operand has 158 places, 91 transitions, 653 flow. Second operand 11 states and 108 transitions. [2024-06-20 15:18:30,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 108 transitions, 911 flow [2024-06-20 15:18:30,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 108 transitions, 879 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:30,189 INFO L231 Difference]: Finished difference. Result has 151 places, 88 transitions, 652 flow [2024-06-20 15:18:30,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=652, PETRI_PLACES=151, PETRI_TRANSITIONS=88} [2024-06-20 15:18:30,190 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-20 15:18:30,190 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 88 transitions, 652 flow [2024-06-20 15:18:30,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:30,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:30,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:30,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:18:30,190 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:30,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:30,191 INFO L85 PathProgramCache]: Analyzing trace with hash 796590869, now seen corresponding path program 25 times [2024-06-20 15:18:30,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:30,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827447182] [2024-06-20 15:18:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:30,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:31,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:31,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827447182] [2024-06-20 15:18:31,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827447182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:31,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:31,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:31,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973559771] [2024-06-20 15:18:31,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:31,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:31,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:32,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:32,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 88 transitions, 652 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:32,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:32,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:32,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:32,489 INFO L124 PetriNetUnfolderBase]: 267/545 cut-off events. [2024-06-20 15:18:32,490 INFO L125 PetriNetUnfolderBase]: For 47493/47493 co-relation queries the response was YES. [2024-06-20 15:18:32,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 545 events. 267/545 cut-off events. For 47493/47493 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2507 event pairs, 82 based on Foata normal form. 6/550 useless extension candidates. Maximal degree in co-relation 3080. Up to 338 conditions per place. [2024-06-20 15:18:32,492 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 76 selfloop transitions, 19 changer transitions 10/107 dead transitions. [2024-06-20 15:18:32,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 107 transitions, 1018 flow [2024-06-20 15:18:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-20 15:18:32,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-20 15:18:32,493 INFO L175 Difference]: Start difference. First operand has 151 places, 88 transitions, 652 flow. Second operand 11 states and 111 transitions. [2024-06-20 15:18:32,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 107 transitions, 1018 flow [2024-06-20 15:18:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 107 transitions, 958 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:32,565 INFO L231 Difference]: Finished difference. Result has 147 places, 84 transitions, 610 flow [2024-06-20 15:18:32,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=610, PETRI_PLACES=147, PETRI_TRANSITIONS=84} [2024-06-20 15:18:32,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-20 15:18:32,565 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 84 transitions, 610 flow [2024-06-20 15:18:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:32,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:32,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:32,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:18:32,566 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:32,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1844805355, now seen corresponding path program 26 times [2024-06-20 15:18:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185146121] [2024-06-20 15:18:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:34,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:34,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185146121] [2024-06-20 15:18:34,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185146121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:34,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:34,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:34,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100053170] [2024-06-20 15:18:34,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:34,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:34,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:34,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 84 transitions, 610 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:34,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:34,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:34,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:34,501 INFO L124 PetriNetUnfolderBase]: 240/492 cut-off events. [2024-06-20 15:18:34,501 INFO L125 PetriNetUnfolderBase]: For 35866/35866 co-relation queries the response was YES. [2024-06-20 15:18:34,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 492 events. 240/492 cut-off events. For 35866/35866 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2209 event pairs, 70 based on Foata normal form. 6/497 useless extension candidates. Maximal degree in co-relation 2558. Up to 410 conditions per place. [2024-06-20 15:18:34,503 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 71 selfloop transitions, 13 changer transitions 14/100 dead transitions. [2024-06-20 15:18:34,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 100 transitions, 848 flow [2024-06-20 15:18:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-20 15:18:34,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-06-20 15:18:34,504 INFO L175 Difference]: Start difference. First operand has 147 places, 84 transitions, 610 flow. Second operand 11 states and 103 transitions. [2024-06-20 15:18:34,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 100 transitions, 848 flow [2024-06-20 15:18:34,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 100 transitions, 808 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:34,575 INFO L231 Difference]: Finished difference. Result has 144 places, 80 transitions, 557 flow [2024-06-20 15:18:34,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=557, PETRI_PLACES=144, PETRI_TRANSITIONS=80} [2024-06-20 15:18:34,575 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-20 15:18:34,576 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 80 transitions, 557 flow [2024-06-20 15:18:34,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:34,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:34,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:34,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:18:34,576 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:34,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:34,577 INFO L85 PathProgramCache]: Analyzing trace with hash -702556339, now seen corresponding path program 27 times [2024-06-20 15:18:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:34,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389882389] [2024-06-20 15:18:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:35,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:35,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389882389] [2024-06-20 15:18:35,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389882389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:35,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:35,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:35,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245704889] [2024-06-20 15:18:35,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:35,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:35,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:35,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:36,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:36,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 80 transitions, 557 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:36,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:36,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:36,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:36,412 INFO L124 PetriNetUnfolderBase]: 226/466 cut-off events. [2024-06-20 15:18:36,412 INFO L125 PetriNetUnfolderBase]: For 33117/33117 co-relation queries the response was YES. [2024-06-20 15:18:36,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2460 conditions, 466 events. 226/466 cut-off events. For 33117/33117 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2061 event pairs, 65 based on Foata normal form. 6/471 useless extension candidates. Maximal degree in co-relation 2400. Up to 379 conditions per place. [2024-06-20 15:18:36,414 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 11 changer transitions 17/96 dead transitions. [2024-06-20 15:18:36,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 96 transitions, 783 flow [2024-06-20 15:18:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-20 15:18:36,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-06-20 15:18:36,415 INFO L175 Difference]: Start difference. First operand has 144 places, 80 transitions, 557 flow. Second operand 11 states and 103 transitions. [2024-06-20 15:18:36,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 96 transitions, 783 flow [2024-06-20 15:18:36,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 96 transitions, 735 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 15:18:36,499 INFO L231 Difference]: Finished difference. Result has 139 places, 74 transitions, 496 flow [2024-06-20 15:18:36,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=496, PETRI_PLACES=139, PETRI_TRANSITIONS=74} [2024-06-20 15:18:36,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-20 15:18:36,499 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 74 transitions, 496 flow [2024-06-20 15:18:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:36,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:36,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:36,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:18:36,500 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:36,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash 226891869, now seen corresponding path program 28 times [2024-06-20 15:18:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:36,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313277484] [2024-06-20 15:18:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313277484] [2024-06-20 15:18:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313277484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:38,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:38,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225255071] [2024-06-20 15:18:38,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:38,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:38,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:38,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:38,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 74 transitions, 496 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:38,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:38,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:38,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:38,429 INFO L124 PetriNetUnfolderBase]: 190/394 cut-off events. [2024-06-20 15:18:38,429 INFO L125 PetriNetUnfolderBase]: For 25582/25582 co-relation queries the response was YES. [2024-06-20 15:18:38,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1820 conditions, 394 events. 190/394 cut-off events. For 25582/25582 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1641 event pairs, 59 based on Foata normal form. 8/401 useless extension candidates. Maximal degree in co-relation 1762. Up to 310 conditions per place. [2024-06-20 15:18:38,431 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 56 selfloop transitions, 7 changer transitions 21/86 dead transitions. [2024-06-20 15:18:38,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 86 transitions, 692 flow [2024-06-20 15:18:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-20 15:18:38,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991202346041056 [2024-06-20 15:18:38,432 INFO L175 Difference]: Start difference. First operand has 139 places, 74 transitions, 496 flow. Second operand 11 states and 102 transitions. [2024-06-20 15:18:38,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 86 transitions, 692 flow [2024-06-20 15:18:38,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 86 transitions, 648 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 15:18:38,463 INFO L231 Difference]: Finished difference. Result has 131 places, 62 transitions, 387 flow [2024-06-20 15:18:38,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=387, PETRI_PLACES=131, PETRI_TRANSITIONS=62} [2024-06-20 15:18:38,464 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-20 15:18:38,464 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 62 transitions, 387 flow [2024-06-20 15:18:38,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:38,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:38,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:38,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:18:38,464 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:38,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1063163341, now seen corresponding path program 29 times [2024-06-20 15:18:38,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:38,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889986808] [2024-06-20 15:18:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:38,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:39,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:39,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889986808] [2024-06-20 15:18:39,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889986808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:39,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:39,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:39,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103716686] [2024-06-20 15:18:39,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:39,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:39,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:39,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:39,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 62 transitions, 387 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:39,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:39,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:39,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:40,257 INFO L124 PetriNetUnfolderBase]: 153/319 cut-off events. [2024-06-20 15:18:40,257 INFO L125 PetriNetUnfolderBase]: For 12944/12944 co-relation queries the response was YES. [2024-06-20 15:18:40,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 319 events. 153/319 cut-off events. For 12944/12944 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1249 event pairs, 36 based on Foata normal form. 6/324 useless extension candidates. Maximal degree in co-relation 1170. Up to 237 conditions per place. [2024-06-20 15:18:40,259 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 51 selfloop transitions, 14 changer transitions 11/78 dead transitions. [2024-06-20 15:18:40,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 78 transitions, 581 flow [2024-06-20 15:18:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-20 15:18:40,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-06-20 15:18:40,260 INFO L175 Difference]: Start difference. First operand has 131 places, 62 transitions, 387 flow. Second operand 11 states and 103 transitions. [2024-06-20 15:18:40,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 78 transitions, 581 flow [2024-06-20 15:18:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 78 transitions, 513 flow, removed 14 selfloop flow, removed 15 redundant places. [2024-06-20 15:18:40,275 INFO L231 Difference]: Finished difference. Result has 113 places, 59 transitions, 343 flow [2024-06-20 15:18:40,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=343, PETRI_PLACES=113, PETRI_TRANSITIONS=59} [2024-06-20 15:18:40,276 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-06-20 15:18:40,276 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 59 transitions, 343 flow [2024-06-20 15:18:40,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:40,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:40,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:40,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:18:40,277 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:40,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash -452823153, now seen corresponding path program 30 times [2024-06-20 15:18:40,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:40,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579076365] [2024-06-20 15:18:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:40,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:41,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:41,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579076365] [2024-06-20 15:18:41,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579076365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:41,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:41,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:41,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848277591] [2024-06-20 15:18:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:41,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:41,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:42,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:42,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 59 transitions, 343 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:42,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:42,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:42,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:42,279 INFO L124 PetriNetUnfolderBase]: 143/301 cut-off events. [2024-06-20 15:18:42,279 INFO L125 PetriNetUnfolderBase]: For 9311/9311 co-relation queries the response was YES. [2024-06-20 15:18:42,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 301 events. 143/301 cut-off events. For 9311/9311 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1157 event pairs, 34 based on Foata normal form. 6/306 useless extension candidates. Maximal degree in co-relation 1030. Up to 219 conditions per place. [2024-06-20 15:18:42,281 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 47 selfloop transitions, 12 changer transitions 14/75 dead transitions. [2024-06-20 15:18:42,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 75 transitions, 523 flow [2024-06-20 15:18:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-20 15:18:42,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991202346041056 [2024-06-20 15:18:42,282 INFO L175 Difference]: Start difference. First operand has 113 places, 59 transitions, 343 flow. Second operand 11 states and 102 transitions. [2024-06-20 15:18:42,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 75 transitions, 523 flow [2024-06-20 15:18:42,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 75 transitions, 489 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:42,290 INFO L231 Difference]: Finished difference. Result has 108 places, 55 transitions, 318 flow [2024-06-20 15:18:42,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=318, PETRI_PLACES=108, PETRI_TRANSITIONS=55} [2024-06-20 15:18:42,291 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2024-06-20 15:18:42,291 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 55 transitions, 318 flow [2024-06-20 15:18:42,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:42,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:42,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:42,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:18:42,292 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:42,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1012574357, now seen corresponding path program 31 times [2024-06-20 15:18:42,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:42,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186150246] [2024-06-20 15:18:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:42,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:44,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:44,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186150246] [2024-06-20 15:18:44,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186150246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:44,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:44,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545144324] [2024-06-20 15:18:44,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:44,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:44,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:44,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:44,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:44,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:44,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 55 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:44,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:44,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:44,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:45,002 INFO L124 PetriNetUnfolderBase]: 129/275 cut-off events. [2024-06-20 15:18:45,002 INFO L125 PetriNetUnfolderBase]: For 8385/8385 co-relation queries the response was YES. [2024-06-20 15:18:45,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 275 events. 129/275 cut-off events. For 8385/8385 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1017 event pairs, 30 based on Foata normal form. 6/280 useless extension candidates. Maximal degree in co-relation 944. Up to 193 conditions per place. [2024-06-20 15:18:45,003 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 42 selfloop transitions, 9 changer transitions 18/71 dead transitions. [2024-06-20 15:18:45,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 71 transitions, 490 flow [2024-06-20 15:18:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 101 transitions. [2024-06-20 15:18:45,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2961876832844575 [2024-06-20 15:18:45,004 INFO L175 Difference]: Start difference. First operand has 108 places, 55 transitions, 318 flow. Second operand 11 states and 101 transitions. [2024-06-20 15:18:45,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 71 transitions, 490 flow [2024-06-20 15:18:45,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 71 transitions, 458 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:45,011 INFO L231 Difference]: Finished difference. Result has 102 places, 49 transitions, 279 flow [2024-06-20 15:18:45,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=102, PETRI_TRANSITIONS=49} [2024-06-20 15:18:45,012 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-06-20 15:18:45,012 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 49 transitions, 279 flow [2024-06-20 15:18:45,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:45,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:45,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:45,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:18:45,012 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:45,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1348588741, now seen corresponding path program 32 times [2024-06-20 15:18:45,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:45,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570477099] [2024-06-20 15:18:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:45,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:46,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570477099] [2024-06-20 15:18:46,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570477099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:46,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:46,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:46,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925282408] [2024-06-20 15:18:46,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:46,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:46,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:46,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:46,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:46,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 49 transitions, 279 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:46,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:46,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:46,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:47,074 INFO L124 PetriNetUnfolderBase]: 111/241 cut-off events. [2024-06-20 15:18:47,074 INFO L125 PetriNetUnfolderBase]: For 7093/7093 co-relation queries the response was YES. [2024-06-20 15:18:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 241 events. 111/241 cut-off events. For 7093/7093 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 835 event pairs, 28 based on Foata normal form. 6/246 useless extension candidates. Maximal degree in co-relation 828. Up to 161 conditions per place. [2024-06-20 15:18:47,075 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 33 selfloop transitions, 3 changer transitions 26/64 dead transitions. [2024-06-20 15:18:47,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 64 transitions, 435 flow [2024-06-20 15:18:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2024-06-20 15:18:47,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-06-20 15:18:47,076 INFO L175 Difference]: Start difference. First operand has 102 places, 49 transitions, 279 flow. Second operand 11 states and 99 transitions. [2024-06-20 15:18:47,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 64 transitions, 435 flow [2024-06-20 15:18:47,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 64 transitions, 407 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:47,084 INFO L231 Difference]: Finished difference. Result has 94 places, 37 transitions, 203 flow [2024-06-20 15:18:47,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=203, PETRI_PLACES=94, PETRI_TRANSITIONS=37} [2024-06-20 15:18:47,084 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-20 15:18:47,084 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 37 transitions, 203 flow [2024-06-20 15:18:47,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:47,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:47,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:47,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:18:47,085 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:47,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash -414776521, now seen corresponding path program 33 times [2024-06-20 15:18:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:47,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146545314] [2024-06-20 15:18:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:48,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:48,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146545314] [2024-06-20 15:18:48,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146545314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:48,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:48,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:48,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100311063] [2024-06-20 15:18:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:48,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:48,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:48,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:48,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 37 transitions, 203 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:48,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:48,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:48,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:49,122 INFO L124 PetriNetUnfolderBase]: 89/192 cut-off events. [2024-06-20 15:18:49,122 INFO L125 PetriNetUnfolderBase]: For 5499/5499 co-relation queries the response was YES. [2024-06-20 15:18:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 192 events. 89/192 cut-off events. For 5499/5499 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 604 event pairs, 24 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 656. Up to 123 conditions per place. [2024-06-20 15:18:49,123 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 30 selfloop transitions, 9 changer transitions 11/52 dead transitions. [2024-06-20 15:18:49,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 52 transitions, 333 flow [2024-06-20 15:18:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2024-06-20 15:18:49,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-06-20 15:18:49,138 INFO L175 Difference]: Start difference. First operand has 94 places, 37 transitions, 203 flow. Second operand 11 states and 99 transitions. [2024-06-20 15:18:49,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 52 transitions, 333 flow [2024-06-20 15:18:49,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 52 transitions, 301 flow, removed 11 selfloop flow, removed 16 redundant places. [2024-06-20 15:18:49,141 INFO L231 Difference]: Finished difference. Result has 72 places, 34 transitions, 178 flow [2024-06-20 15:18:49,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=178, PETRI_PLACES=72, PETRI_TRANSITIONS=34} [2024-06-20 15:18:49,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-20 15:18:49,141 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 34 transitions, 178 flow [2024-06-20 15:18:49,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:49,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:49,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:18:49,142 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:49,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1801027179, now seen corresponding path program 34 times [2024-06-20 15:18:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:49,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881400695] [2024-06-20 15:18:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:50,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:50,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881400695] [2024-06-20 15:18:50,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881400695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:50,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:50,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:50,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817141300] [2024-06-20 15:18:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:50,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:50,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:50,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:50,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 34 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:50,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:50,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:51,147 INFO L124 PetriNetUnfolderBase]: 79/174 cut-off events. [2024-06-20 15:18:51,148 INFO L125 PetriNetUnfolderBase]: For 2476/2476 co-relation queries the response was YES. [2024-06-20 15:18:51,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 174 events. 79/174 cut-off events. For 2476/2476 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 530 event pairs, 22 based on Foata normal form. 6/179 useless extension candidates. Maximal degree in co-relation 560. Up to 105 conditions per place. [2024-06-20 15:18:51,149 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 26 selfloop transitions, 7 changer transitions 14/49 dead transitions. [2024-06-20 15:18:51,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 49 transitions, 302 flow [2024-06-20 15:18:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 98 transitions. [2024-06-20 15:18:51,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2873900293255132 [2024-06-20 15:18:51,163 INFO L175 Difference]: Start difference. First operand has 72 places, 34 transitions, 178 flow. Second operand 11 states and 98 transitions. [2024-06-20 15:18:51,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 49 transitions, 302 flow [2024-06-20 15:18:51,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 49 transitions, 278 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:51,165 INFO L231 Difference]: Finished difference. Result has 68 places, 30 transitions, 153 flow [2024-06-20 15:18:51,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=153, PETRI_PLACES=68, PETRI_TRANSITIONS=30} [2024-06-20 15:18:51,166 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2024-06-20 15:18:51,166 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 30 transitions, 153 flow [2024-06-20 15:18:51,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:51,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:51,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:51,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:18:51,167 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:51,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash -419418151, now seen corresponding path program 35 times [2024-06-20 15:18:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:51,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241381943] [2024-06-20 15:18:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:51,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:52,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241381943] [2024-06-20 15:18:52,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241381943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:52,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:52,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:18:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808486170] [2024-06-20 15:18:52,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:52,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:18:52,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:18:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:18:52,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:52,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 30 transitions, 153 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:52,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:52,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:52,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:52,958 INFO L124 PetriNetUnfolderBase]: 65/148 cut-off events. [2024-06-20 15:18:52,958 INFO L125 PetriNetUnfolderBase]: For 2004/2004 co-relation queries the response was YES. [2024-06-20 15:18:52,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 148 events. 65/148 cut-off events. For 2004/2004 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 409 event pairs, 18 based on Foata normal form. 6/153 useless extension candidates. Maximal degree in co-relation 474. Up to 79 conditions per place. [2024-06-20 15:18:52,958 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 21 selfloop transitions, 5 changer transitions 17/45 dead transitions. [2024-06-20 15:18:52,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 45 transitions, 269 flow [2024-06-20 15:18:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2024-06-20 15:18:52,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28152492668621704 [2024-06-20 15:18:52,972 INFO L175 Difference]: Start difference. First operand has 68 places, 30 transitions, 153 flow. Second operand 11 states and 96 transitions. [2024-06-20 15:18:52,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 45 transitions, 269 flow [2024-06-20 15:18:52,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 45 transitions, 247 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:52,988 INFO L231 Difference]: Finished difference. Result has 62 places, 25 transitions, 121 flow [2024-06-20 15:18:52,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=121, PETRI_PLACES=62, PETRI_TRANSITIONS=25} [2024-06-20 15:18:52,988 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-20 15:18:52,989 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 25 transitions, 121 flow [2024-06-20 15:18:52,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:52,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:52,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:52,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:18:52,989 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:52,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1468611673, now seen corresponding path program 36 times [2024-06-20 15:18:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:52,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757835174] [2024-06-20 15:18:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:54,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757835174] [2024-06-20 15:18:54,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757835174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:54,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:54,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712333051] [2024-06-20 15:18:54,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:54,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:54,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:54,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:54,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 25 transitions, 121 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:54,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:54,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:54,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:55,238 INFO L124 PetriNetUnfolderBase]: 49/116 cut-off events. [2024-06-20 15:18:55,239 INFO L125 PetriNetUnfolderBase]: For 1396/1396 co-relation queries the response was YES. [2024-06-20 15:18:55,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 116 events. 49/116 cut-off events. For 1396/1396 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 277 event pairs, 16 based on Foata normal form. 6/121 useless extension candidates. Maximal degree in co-relation 368. Up to 52 conditions per place. [2024-06-20 15:18:55,239 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 18 selfloop transitions, 7 changer transitions 11/38 dead transitions. [2024-06-20 15:18:55,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 219 flow [2024-06-20 15:18:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 92 transitions. [2024-06-20 15:18:55,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697947214076246 [2024-06-20 15:18:55,240 INFO L175 Difference]: Start difference. First operand has 62 places, 25 transitions, 121 flow. Second operand 11 states and 92 transitions. [2024-06-20 15:18:55,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 219 flow [2024-06-20 15:18:55,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 38 transitions, 199 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:55,242 INFO L231 Difference]: Finished difference. Result has 54 places, 22 transitions, 104 flow [2024-06-20 15:18:55,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=104, PETRI_PLACES=54, PETRI_TRANSITIONS=22} [2024-06-20 15:18:55,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-20 15:18:55,242 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 22 transitions, 104 flow [2024-06-20 15:18:55,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:55,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:55,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:55,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:18:55,243 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:18:55,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash 82361015, now seen corresponding path program 37 times [2024-06-20 15:18:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:55,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344499763] [2024-06-20 15:18:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:56,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:56,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344499763] [2024-06-20 15:18:56,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344499763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:56,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:56,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:18:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854178570] [2024-06-20 15:18:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:18:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:18:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:18:56,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 15:18:56,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 22 transitions, 104 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:56,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:56,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 15:18:56,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:56,964 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2024-06-20 15:18:56,965 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-20 15:18:56,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 65 events. 24/65 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 168. Up to 24 conditions per place. [2024-06-20 15:18:56,965 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-20 15:18:56,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 30 transitions, 154 flow [2024-06-20 15:18:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 84 transitions. [2024-06-20 15:18:56,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24633431085043989 [2024-06-20 15:18:56,966 INFO L175 Difference]: Start difference. First operand has 54 places, 22 transitions, 104 flow. Second operand 11 states and 84 transitions. [2024-06-20 15:18:56,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 30 transitions, 154 flow [2024-06-20 15:18:56,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 122 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-06-20 15:18:56,967 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2024-06-20 15:18:56,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2024-06-20 15:18:56,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-20 15:18:56,967 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2024-06-20 15:18:56,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:56,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 15:18:56,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 15:18:56,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 15:18:56,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 15:18:56,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:18:56,977 INFO L445 BasicCegarLoop]: Path program histogram: [37, 26, 20, 15, 12, 10, 7, 7, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:56,981 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 15:18:56,981 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 15:18:56,984 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 15:18:56,984 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 15:18:56,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 03:18:56 BasicIcfg [2024-06-20 15:18:56,985 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 15:18:56,985 INFO L158 Benchmark]: Toolchain (without parser) took 337219.80ms. Allocated memory was 142.6MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 112.4MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 190.4MB. Max. memory is 16.1GB. [2024-06-20 15:18:56,987 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 91.9MB in the beginning and 91.8MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:18:56,988 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 142.6MB. Free memory is still 110.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:18:56,988 INFO L158 Benchmark]: CACSL2BoogieTranslator took 598.23ms. Allocated memory was 142.6MB in the beginning and 216.0MB in the end (delta: 73.4MB). Free memory was 112.2MB in the beginning and 153.6MB in the end (delta: -41.3MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2024-06-20 15:18:56,988 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.74ms. Allocated memory is still 216.0MB. Free memory was 153.6MB in the beginning and 150.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 15:18:56,988 INFO L158 Benchmark]: Boogie Preprocessor took 49.00ms. Allocated memory is still 216.0MB. Free memory was 150.4MB in the beginning and 145.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 15:18:56,988 INFO L158 Benchmark]: RCFGBuilder took 708.40ms. Allocated memory is still 216.0MB. Free memory was 145.2MB in the beginning and 77.0MB in the end (delta: 68.2MB). Peak memory consumption was 69.2MB. Max. memory is 16.1GB. [2024-06-20 15:18:56,988 INFO L158 Benchmark]: TraceAbstraction took 335778.11ms. Allocated memory was 216.0MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 76.0MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 81.8MB. Max. memory is 16.1GB. [2024-06-20 15:18:56,989 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 91.9MB in the beginning and 91.8MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 142.6MB. Free memory is still 110.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 598.23ms. Allocated memory was 142.6MB in the beginning and 216.0MB in the end (delta: 73.4MB). Free memory was 112.2MB in the beginning and 153.6MB in the end (delta: -41.3MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.74ms. Allocated memory is still 216.0MB. Free memory was 153.6MB in the beginning and 150.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.00ms. Allocated memory is still 216.0MB. Free memory was 150.4MB in the beginning and 145.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 708.40ms. Allocated memory is still 216.0MB. Free memory was 145.2MB in the beginning and 77.0MB in the end (delta: 68.2MB). Peak memory consumption was 69.2MB. Max. memory is 16.1GB. * TraceAbstraction took 335778.11ms. Allocated memory was 216.0MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 76.0MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 81.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 829]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 830]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 335.7s, OverallIterations: 182, TraceHistogramMax: 1, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.0s, AutomataDifference: 121.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9694 SdHoareTripleChecker+Valid, 43.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8346 mSDsluCounter, 8817 SdHoareTripleChecker+Invalid, 37.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7583 mSDsCounter, 2192 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68717 IncrementalHoareTripleChecker+Invalid, 70909 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2192 mSolverCounterUnsat, 1234 mSDtfsCounter, 68717 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2109 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2089 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4313 ImplicationChecksByTransitivity, 55.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2528occurred in iteration=120, InterpolantAutomatonStates: 1755, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 211.4s InterpolantComputationTime, 3054 NumberOfCodeBlocks, 3054 NumberOfCodeBlocksAsserted, 182 NumberOfCheckSat, 2872 ConstructedInterpolants, 0 QuantifiedInterpolants, 133134 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 182 InterpolantComputations, 182 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 15:18:57,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE