./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:33:00,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:33:00,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:33:00,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:33:00,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:33:00,100 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:33:00,101 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:33:00,101 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:33:00,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:33:00,104 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:33:00,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:33:00,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:33:00,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:33:00,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:33:00,107 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:33:00,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:33:00,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:33:00,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:33:00,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:33:00,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:33:00,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:33:00,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:33:00,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:33:00,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:33:00,109 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:33:00,109 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:33:00,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:33:00,110 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:33:00,110 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:33:00,110 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:33:00,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:33:00,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:33:00,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:33:00,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:33:00,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:33:00,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:33:00,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:33:00,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:33:00,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:33:00,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:33:00,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:33:00,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:33:00,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:33:00,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:33:00,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:33:00,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:33:00,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:33:00,362 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:33:00,363 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:33:00,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 16:33:01,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:33:01,543 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:33:01,543 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 16:33:01,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d42e8c191/b53247d345034a8393a16575d63d9b0d/FLAGa04f5980a [2024-06-21 16:33:01,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d42e8c191/b53247d345034a8393a16575d63d9b0d [2024-06-21 16:33:01,570 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:33:01,571 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:33:01,572 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 16:33:01,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:33:01,710 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:33:01,711 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:33:01,712 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:33:01,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:33:01,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:33:01" (1/2) ... [2024-06-21 16:33:01,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63eb7f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:33:01, skipping insertion in model container [2024-06-21 16:33:01,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:33:01" (1/2) ... [2024-06-21 16:33:01,718 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13579dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:33:01, skipping insertion in model container [2024-06-21 16:33:01,718 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:33:01" (2/2) ... [2024-06-21 16:33:01,718 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63eb7f5b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:01, skipping insertion in model container [2024-06-21 16:33:01,718 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:33:01" (2/2) ... [2024-06-21 16:33:01,719 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:33:01,768 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:33:01,769 INFO L97 edCorrectnessWitness]: Location invariant before [L814-L814] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0) [2024-06-21 16:33:01,769 INFO L97 edCorrectnessWitness]: Location invariant before [L813-L813] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0) [2024-06-21 16:33:01,770 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:33:01,770 INFO L106 edCorrectnessWitness]: ghost_update [L811-L811] multithreaded = 1; [2024-06-21 16:33:01,805 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:33:02,092 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:33:02,106 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:33:02,205 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:33:02,239 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:33:02,239 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02 WrapperNode [2024-06-21 16:33:02,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:33:02,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:33:02,240 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:33:02,240 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:33:02,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,255 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,273 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 113 [2024-06-21 16:33:02,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:33:02,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:33:02,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:33:02,274 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:33:02,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,300 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]. [2024-06-21 16:33:02,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,300 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,312 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:33:02,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:33:02,337 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:33:02,337 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:33:02,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (1/1) ... [2024-06-21 16:33:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:33:02,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:33:02,385 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) [2024-06-21 16:33:02,416 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 [2024-06-21 16:33:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:33:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:33:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:33:02,439 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:33:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:33:02,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:33:02,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:33:02,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:33:02,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:33:02,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:33:02,441 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:33:02,531 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:33:02,532 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:33:02,739 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:33:02,739 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:33:02,890 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:33:02,890 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:33:02,892 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:33:02 BoogieIcfgContainer [2024-06-21 16:33:02,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:33:02,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:33:02,895 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:33:02,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:33:02,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:33:01" (1/4) ... [2024-06-21 16:33:02,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18606c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:33:02, skipping insertion in model container [2024-06-21 16:33:02,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:33:01" (2/4) ... [2024-06-21 16:33:02,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18606c98 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:33:02, skipping insertion in model container [2024-06-21 16:33:02,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:33:02" (3/4) ... [2024-06-21 16:33:02,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18606c98 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:33:02, skipping insertion in model container [2024-06-21 16:33:02,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:33:02" (4/4) ... [2024-06-21 16:33:02,901 INFO L112 eAbstractionObserver]: Analyzing ICFG mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 16:33:02,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:33:02,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 16:33:02,913 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:33:02,951 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:33:02,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 16:33:03,001 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-21 16:33:03,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:33:03,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:33:03,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 16:33:03,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-21 16:33:03,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:33:03,029 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;@55df9f6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:33:03,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 16:33:03,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:33:03,031 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:33:03,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:33:03,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:03,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:33:03,033 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)] === [2024-06-21 16:33:03,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 325944614, now seen corresponding path program 1 times [2024-06-21 16:33:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:03,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400138670] [2024-06-21 16:33:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:03,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:03,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400138670] [2024-06-21 16:33:03,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400138670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:03,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:03,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:33:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548463353] [2024-06-21 16:33:03,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:03,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:33:03,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:33:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:33:03,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-21 16:33:03,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:03,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:03,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-21 16:33:03,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:03,776 INFO L124 PetriNetUnfolderBase]: 162/306 cut-off events. [2024-06-21 16:33:03,776 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 16:33:03,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 306 events. 162/306 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1107 event pairs, 97 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 606. Up to 288 conditions per place. [2024-06-21 16:33:03,781 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 21 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-21 16:33:03,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 113 flow [2024-06-21 16:33:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:33:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:33:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-21 16:33:03,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-21 16:33:03,792 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 53 transitions. [2024-06-21 16:33:03,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 113 flow [2024-06-21 16:33:03,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 16:33:03,795 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-21 16:33:03,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-21 16:33:03,799 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-21 16:33:03,799 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-21 16:33:03,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:03,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:03,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:03,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:33:03,801 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)] === [2024-06-21 16:33:03,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash -299804411, now seen corresponding path program 1 times [2024-06-21 16:33:03,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:03,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897101575] [2024-06-21 16:33:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:03,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:04,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:04,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897101575] [2024-06-21 16:33:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897101575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:04,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:04,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:33:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164865703] [2024-06-21 16:33:04,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:04,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:33:04,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:33:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:33:04,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-21 16:33:04,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2024-06-21 16:33:04,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:04,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-21 16:33:04,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:04,349 INFO L124 PetriNetUnfolderBase]: 159/303 cut-off events. [2024-06-21 16:33:04,349 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-21 16:33:04,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 303 events. 159/303 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1097 event pairs, 79 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 679. Up to 274 conditions per place. [2024-06-21 16:33:04,354 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 25 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-21 16:33:04,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 155 flow [2024-06-21 16:33:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:33:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:33:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-06-21 16:33:04,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 16:33:04,357 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 68 transitions. [2024-06-21 16:33:04,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 155 flow [2024-06-21 16:33:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:33:04,361 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-21 16:33:04,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-21 16:33:04,362 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-21 16:33:04,362 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-21 16:33:04,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2024-06-21 16:33:04,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:04,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:04,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:33:04,363 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)] === [2024-06-21 16:33:04,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash -704001021, now seen corresponding path program 1 times [2024-06-21 16:33:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461177986] [2024-06-21 16:33:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:04,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:04,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461177986] [2024-06-21 16:33:04,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461177986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:04,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:04,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:33:04,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007417988] [2024-06-21 16:33:04,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:04,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:33:04,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:04,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:33:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:33:04,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-21 16:33:04,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:04,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:04,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-21 16:33:04,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:04,879 INFO L124 PetriNetUnfolderBase]: 187/338 cut-off events. [2024-06-21 16:33:04,879 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-06-21 16:33:04,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 338 events. 187/338 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1201 event pairs, 67 based on Foata normal form. 3/340 useless extension candidates. Maximal degree in co-relation 852. Up to 293 conditions per place. [2024-06-21 16:33:04,881 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 34 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-06-21 16:33:04,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 249 flow [2024-06-21 16:33:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:33:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:33:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 16:33:04,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 16:33:04,885 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 5 states and 85 transitions. [2024-06-21 16:33:04,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 249 flow [2024-06-21 16:33:04,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 240 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 16:33:04,888 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 160 flow [2024-06-21 16:33:04,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-06-21 16:33:04,889 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-06-21 16:33:04,889 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 160 flow [2024-06-21 16:33:04,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:04,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:04,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:04,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:33:04,890 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)] === [2024-06-21 16:33:04,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash -210665862, now seen corresponding path program 1 times [2024-06-21 16:33:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:04,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776311228] [2024-06-21 16:33:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:05,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776311228] [2024-06-21 16:33:05,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776311228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:05,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:33:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884526431] [2024-06-21 16:33:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:05,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:33:05,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:33:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:33:05,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-21 16:33:05,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:05,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:05,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-21 16:33:05,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:05,617 INFO L124 PetriNetUnfolderBase]: 188/340 cut-off events. [2024-06-21 16:33:05,618 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-21 16:33:05,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 340 events. 188/340 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1187 event pairs, 46 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 1026. Up to 282 conditions per place. [2024-06-21 16:33:05,619 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 38 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-06-21 16:33:05,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 334 flow [2024-06-21 16:33:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:33:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:33:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 16:33:05,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 16:33:05,621 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 160 flow. Second operand 6 states and 100 transitions. [2024-06-21 16:33:05,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 334 flow [2024-06-21 16:33:05,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 330 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 16:33:05,624 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 212 flow [2024-06-21 16:33:05,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 16:33:05,624 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-06-21 16:33:05,625 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 212 flow [2024-06-21 16:33:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:05,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:05,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:05,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:33:05,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:33:05,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2059888706, now seen corresponding path program 1 times [2024-06-21 16:33:05,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:05,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474004811] [2024-06-21 16:33:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474004811] [2024-06-21 16:33:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474004811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:06,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:06,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:33:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768312622] [2024-06-21 16:33:06,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:06,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:33:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:33:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:33:06,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-21 16:33:06,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 212 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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) [2024-06-21 16:33:06,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:06,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-21 16:33:06,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:06,384 INFO L124 PetriNetUnfolderBase]: 189/343 cut-off events. [2024-06-21 16:33:06,384 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-21 16:33:06,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 343 events. 189/343 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1206 event pairs, 24 based on Foata normal form. 6/348 useless extension candidates. Maximal degree in co-relation 1156. Up to 259 conditions per place. [2024-06-21 16:33:06,387 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 38 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2024-06-21 16:33:06,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 380 flow [2024-06-21 16:33:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 16:33:06,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 16:33:06,390 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 212 flow. Second operand 7 states and 110 transitions. [2024-06-21 16:33:06,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 380 flow [2024-06-21 16:33:06,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 348 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:33:06,394 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 215 flow [2024-06-21 16:33:06,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-06-21 16:33:06,399 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-21 16:33:06,400 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 215 flow [2024-06-21 16:33:06,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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) [2024-06-21 16:33:06,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:06,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:06,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:33:06,401 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)] === [2024-06-21 16:33:06,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:06,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1384917533, now seen corresponding path program 1 times [2024-06-21 16:33:06,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516611342] [2024-06-21 16:33:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:06,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516611342] [2024-06-21 16:33:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516611342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:06,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:33:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918370676] [2024-06-21 16:33:06,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:33:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:33:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:33:06,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:06,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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) [2024-06-21 16:33:06,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:06,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:06,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:06,954 INFO L124 PetriNetUnfolderBase]: 187/340 cut-off events. [2024-06-21 16:33:06,955 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2024-06-21 16:33:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 340 events. 187/340 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1200 event pairs, 47 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 1202. Up to 329 conditions per place. [2024-06-21 16:33:06,957 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-06-21 16:33:06,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 307 flow [2024-06-21 16:33:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:33:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:33:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-06-21 16:33:06,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-21 16:33:06,958 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 215 flow. Second operand 5 states and 59 transitions. [2024-06-21 16:33:06,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 307 flow [2024-06-21 16:33:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 266 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:06,960 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 191 flow [2024-06-21 16:33:06,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-06-21 16:33:06,961 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-21 16:33:06,961 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 191 flow [2024-06-21 16:33:06,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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) [2024-06-21 16:33:06,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:06,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:06,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:33:06,961 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)] === [2024-06-21 16:33:06,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:06,962 INFO L85 PathProgramCache]: Analyzing trace with hash -17632073, now seen corresponding path program 1 times [2024-06-21 16:33:06,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:06,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325954761] [2024-06-21 16:33:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:06,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:07,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:07,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325954761] [2024-06-21 16:33:07,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325954761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:07,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:07,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:33:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020206606] [2024-06-21 16:33:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:07,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:33:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:33:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:33:07,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:07,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-21 16:33:07,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:07,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:07,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:07,564 INFO L124 PetriNetUnfolderBase]: 181/331 cut-off events. [2024-06-21 16:33:07,564 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2024-06-21 16:33:07,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 331 events. 181/331 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1146 event pairs, 44 based on Foata normal form. 3/333 useless extension candidates. Maximal degree in co-relation 1128. Up to 311 conditions per place. [2024-06-21 16:33:07,566 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 37 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-06-21 16:33:07,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 307 flow [2024-06-21 16:33:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:33:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:33:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-21 16:33:07,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:33:07,567 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 191 flow. Second operand 6 states and 70 transitions. [2024-06-21 16:33:07,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 307 flow [2024-06-21 16:33:07,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 292 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 16:33:07,570 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 209 flow [2024-06-21 16:33:07,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-06-21 16:33:07,570 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-06-21 16:33:07,570 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 209 flow [2024-06-21 16:33:07,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-21 16:33:07,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:07,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:33:07,571 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)] === [2024-06-21 16:33:07,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1376822006, now seen corresponding path program 1 times [2024-06-21 16:33:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134542967] [2024-06-21 16:33:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:07,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:07,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134542967] [2024-06-21 16:33:07,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134542967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:07,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:07,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:33:07,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410410383] [2024-06-21 16:33:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:07,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:33:07,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:33:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:33:08,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:08,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-21 16:33:08,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:08,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:08,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:08,117 INFO L124 PetriNetUnfolderBase]: 182/333 cut-off events. [2024-06-21 16:33:08,117 INFO L125 PetriNetUnfolderBase]: For 1009/1009 co-relation queries the response was YES. [2024-06-21 16:33:08,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 333 events. 182/333 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1146 event pairs, 43 based on Foata normal form. 2/334 useless extension candidates. Maximal degree in co-relation 1200. Up to 288 conditions per place. [2024-06-21 16:33:08,119 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 36 selfloop transitions, 13 changer transitions 0/51 dead transitions. [2024-06-21 16:33:08,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 358 flow [2024-06-21 16:33:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:33:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:33:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-06-21 16:33:08,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 16:33:08,120 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 209 flow. Second operand 6 states and 76 transitions. [2024-06-21 16:33:08,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 358 flow [2024-06-21 16:33:08,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 341 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:33:08,122 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 240 flow [2024-06-21 16:33:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-21 16:33:08,123 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2024-06-21 16:33:08,123 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 240 flow [2024-06-21 16:33:08,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-21 16:33:08,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:08,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:33:08,124 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)] === [2024-06-21 16:33:08,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash -534088964, now seen corresponding path program 2 times [2024-06-21 16:33:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:08,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078403480] [2024-06-21 16:33:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:08,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:08,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078403480] [2024-06-21 16:33:08,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078403480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:08,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:08,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:33:08,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077914635] [2024-06-21 16:33:08,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:08,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:33:08,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:33:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:33:08,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:08,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-21 16:33:08,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:08,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:08,680 INFO L124 PetriNetUnfolderBase]: 177/323 cut-off events. [2024-06-21 16:33:08,680 INFO L125 PetriNetUnfolderBase]: For 1164/1164 co-relation queries the response was YES. [2024-06-21 16:33:08,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 323 events. 177/323 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1094 event pairs, 42 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 1201. Up to 309 conditions per place. [2024-06-21 16:33:08,682 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 37 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-06-21 16:33:08,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 344 flow [2024-06-21 16:33:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:33:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:33:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-06-21 16:33:08,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 16:33:08,684 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 240 flow. Second operand 6 states and 68 transitions. [2024-06-21 16:33:08,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 344 flow [2024-06-21 16:33:08,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 329 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:08,686 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 246 flow [2024-06-21 16:33:08,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-06-21 16:33:08,687 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2024-06-21 16:33:08,687 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 246 flow [2024-06-21 16:33:08,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-21 16:33:08,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:08,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:08,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:33:08,688 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)] === [2024-06-21 16:33:08,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 268191758, now seen corresponding path program 1 times [2024-06-21 16:33:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559949718] [2024-06-21 16:33:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559949718] [2024-06-21 16:33:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559949718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:09,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:09,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:33:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903427798] [2024-06-21 16:33:09,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:09,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:33:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:33:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:33:09,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:09,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 246 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:09,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:09,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:09,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:09,334 INFO L124 PetriNetUnfolderBase]: 215/385 cut-off events. [2024-06-21 16:33:09,334 INFO L125 PetriNetUnfolderBase]: For 1805/1805 co-relation queries the response was YES. [2024-06-21 16:33:09,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1461 conditions, 385 events. 215/385 cut-off events. For 1805/1805 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1393 event pairs, 48 based on Foata normal form. 6/390 useless extension candidates. Maximal degree in co-relation 1435. Up to 276 conditions per place. [2024-06-21 16:33:09,336 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 45 selfloop transitions, 17 changer transitions 0/64 dead transitions. [2024-06-21 16:33:09,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 456 flow [2024-06-21 16:33:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-21 16:33:09,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 16:33:09,337 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 246 flow. Second operand 7 states and 92 transitions. [2024-06-21 16:33:09,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 456 flow [2024-06-21 16:33:09,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 422 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:09,340 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 295 flow [2024-06-21 16:33:09,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-21 16:33:09,341 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2024-06-21 16:33:09,341 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 295 flow [2024-06-21 16:33:09,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:09,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:09,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:09,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:33:09,341 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)] === [2024-06-21 16:33:09,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 623112284, now seen corresponding path program 2 times [2024-06-21 16:33:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:09,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134697983] [2024-06-21 16:33:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:09,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:09,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:09,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134697983] [2024-06-21 16:33:09,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134697983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:09,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:09,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:33:09,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238141181] [2024-06-21 16:33:09,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:09,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:33:09,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:33:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:33:09,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:09,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 295 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:09,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:09,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:09,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:09,984 INFO L124 PetriNetUnfolderBase]: 224/400 cut-off events. [2024-06-21 16:33:09,984 INFO L125 PetriNetUnfolderBase]: For 2141/2141 co-relation queries the response was YES. [2024-06-21 16:33:09,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1675 conditions, 400 events. 224/400 cut-off events. For 2141/2141 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1446 event pairs, 48 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 1647. Up to 360 conditions per place. [2024-06-21 16:33:09,987 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 49 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-21 16:33:09,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 497 flow [2024-06-21 16:33:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 16:33:09,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:33:09,988 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 295 flow. Second operand 7 states and 84 transitions. [2024-06-21 16:33:09,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 497 flow [2024-06-21 16:33:09,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 482 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 16:33:09,991 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 343 flow [2024-06-21 16:33:09,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-06-21 16:33:09,992 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2024-06-21 16:33:09,992 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 343 flow [2024-06-21 16:33:09,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:09,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:09,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:33:09,993 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)] === [2024-06-21 16:33:09,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1955003612, now seen corresponding path program 3 times [2024-06-21 16:33:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:09,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865289565] [2024-06-21 16:33:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:10,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:10,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865289565] [2024-06-21 16:33:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865289565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:10,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:10,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:33:10,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138769578] [2024-06-21 16:33:10,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:10,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:33:10,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:33:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:33:10,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:10,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 343 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:10,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:10,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:10,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:10,654 INFO L124 PetriNetUnfolderBase]: 218/391 cut-off events. [2024-06-21 16:33:10,655 INFO L125 PetriNetUnfolderBase]: For 2396/2396 co-relation queries the response was YES. [2024-06-21 16:33:10,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 391 events. 218/391 cut-off events. For 2396/2396 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1413 event pairs, 50 based on Foata normal form. 3/393 useless extension candidates. Maximal degree in co-relation 1648. Up to 368 conditions per place. [2024-06-21 16:33:10,657 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 49 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-21 16:33:10,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 483 flow [2024-06-21 16:33:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 16:33:10,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-21 16:33:10,658 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 343 flow. Second operand 7 states and 79 transitions. [2024-06-21 16:33:10,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 483 flow [2024-06-21 16:33:10,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 459 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:10,662 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 344 flow [2024-06-21 16:33:10,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-06-21 16:33:10,663 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-21 16:33:10,663 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 344 flow [2024-06-21 16:33:10,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:10,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:10,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:10,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:33:10,663 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)] === [2024-06-21 16:33:10,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:10,664 INFO L85 PathProgramCache]: Analyzing trace with hash -279804311, now seen corresponding path program 1 times [2024-06-21 16:33:10,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:10,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409206772] [2024-06-21 16:33:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:10,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409206772] [2024-06-21 16:33:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409206772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:11,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:11,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:33:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542892172] [2024-06-21 16:33:11,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:11,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:33:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:33:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:33:11,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:11,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:11,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:11,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:11,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:11,397 INFO L124 PetriNetUnfolderBase]: 216/388 cut-off events. [2024-06-21 16:33:11,397 INFO L125 PetriNetUnfolderBase]: For 2473/2473 co-relation queries the response was YES. [2024-06-21 16:33:11,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1686 conditions, 388 events. 216/388 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1401 event pairs, 50 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1654. Up to 328 conditions per place. [2024-06-21 16:33:11,400 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 48 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2024-06-21 16:33:11,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 522 flow [2024-06-21 16:33:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 16:33:11,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 16:33:11,401 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 344 flow. Second operand 8 states and 97 transitions. [2024-06-21 16:33:11,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 522 flow [2024-06-21 16:33:11,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 496 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:11,405 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 376 flow [2024-06-21 16:33:11,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=376, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-06-21 16:33:11,406 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-06-21 16:33:11,406 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 376 flow [2024-06-21 16:33:11,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:11,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:11,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:11,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:33:11,407 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)] === [2024-06-21 16:33:11,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash -275989296, now seen corresponding path program 1 times [2024-06-21 16:33:11,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:11,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150899941] [2024-06-21 16:33:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:11,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:11,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150899941] [2024-06-21 16:33:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150899941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:11,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:11,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:11,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369414307] [2024-06-21 16:33:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:11,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:11,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:11,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 376 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:11,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:11,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:11,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:12,176 INFO L124 PetriNetUnfolderBase]: 225/403 cut-off events. [2024-06-21 16:33:12,176 INFO L125 PetriNetUnfolderBase]: For 3034/3034 co-relation queries the response was YES. [2024-06-21 16:33:12,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 403 events. 225/403 cut-off events. For 3034/3034 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1472 event pairs, 47 based on Foata normal form. 3/405 useless extension candidates. Maximal degree in co-relation 1775. Up to 282 conditions per place. [2024-06-21 16:33:12,178 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 51 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2024-06-21 16:33:12,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 606 flow [2024-06-21 16:33:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 16:33:12,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-21 16:33:12,180 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 376 flow. Second operand 8 states and 103 transitions. [2024-06-21 16:33:12,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 606 flow [2024-06-21 16:33:12,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 74 transitions, 566 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:12,184 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 397 flow [2024-06-21 16:33:12,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-06-21 16:33:12,184 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-06-21 16:33:12,185 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 397 flow [2024-06-21 16:33:12,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:12,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:12,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:33:12,185 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)] === [2024-06-21 16:33:12,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:12,186 INFO L85 PathProgramCache]: Analyzing trace with hash -275994876, now seen corresponding path program 2 times [2024-06-21 16:33:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:12,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810558685] [2024-06-21 16:33:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810558685] [2024-06-21 16:33:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810558685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:12,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:33:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981072509] [2024-06-21 16:33:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:33:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:33:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:33:12,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:12,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 397 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:12,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:12,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:12,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:12,820 INFO L124 PetriNetUnfolderBase]: 234/418 cut-off events. [2024-06-21 16:33:12,820 INFO L125 PetriNetUnfolderBase]: For 3602/3602 co-relation queries the response was YES. [2024-06-21 16:33:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1924 conditions, 418 events. 234/418 cut-off events. For 3602/3602 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1551 event pairs, 45 based on Foata normal form. 3/420 useless extension candidates. Maximal degree in co-relation 1890. Up to 290 conditions per place. [2024-06-21 16:33:12,822 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 26 changer transitions 0/78 dead transitions. [2024-06-21 16:33:12,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 647 flow [2024-06-21 16:33:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-21 16:33:12,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 16:33:12,823 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 397 flow. Second operand 7 states and 97 transitions. [2024-06-21 16:33:12,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 647 flow [2024-06-21 16:33:12,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 595 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:12,828 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 420 flow [2024-06-21 16:33:12,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-06-21 16:33:12,829 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-21 16:33:12,829 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 420 flow [2024-06-21 16:33:12,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:12,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:12,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:12,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:33:12,830 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)] === [2024-06-21 16:33:12,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1463551134, now seen corresponding path program 3 times [2024-06-21 16:33:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196305228] [2024-06-21 16:33:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:13,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196305228] [2024-06-21 16:33:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196305228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:13,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307548053] [2024-06-21 16:33:13,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:13,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:13,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:13,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:13,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 420 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:13,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:13,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:13,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:13,434 INFO L124 PetriNetUnfolderBase]: 243/433 cut-off events. [2024-06-21 16:33:13,434 INFO L125 PetriNetUnfolderBase]: For 4035/4035 co-relation queries the response was YES. [2024-06-21 16:33:13,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 433 events. 243/433 cut-off events. For 4035/4035 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1615 event pairs, 53 based on Foata normal form. 3/435 useless extension candidates. Maximal degree in co-relation 1991. Up to 397 conditions per place. [2024-06-21 16:33:13,437 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 58 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-21 16:33:13,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 608 flow [2024-06-21 16:33:13,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 16:33:13,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:33:13,438 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 420 flow. Second operand 8 states and 90 transitions. [2024-06-21 16:33:13,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 608 flow [2024-06-21 16:33:13,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 560 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 16:33:13,443 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 423 flow [2024-06-21 16:33:13,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-06-21 16:33:13,443 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-06-21 16:33:13,444 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 423 flow [2024-06-21 16:33:13,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:13,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:13,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:13,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:33:13,445 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)] === [2024-06-21 16:33:13,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:13,446 INFO L85 PathProgramCache]: Analyzing trace with hash 475578283, now seen corresponding path program 1 times [2024-06-21 16:33:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:13,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301139077] [2024-06-21 16:33:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:14,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:14,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301139077] [2024-06-21 16:33:14,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301139077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:14,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:14,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688390061] [2024-06-21 16:33:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:14,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:14,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:14,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:14,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 423 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:14,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:14,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:14,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:14,422 INFO L124 PetriNetUnfolderBase]: 239/427 cut-off events. [2024-06-21 16:33:14,422 INFO L125 PetriNetUnfolderBase]: For 4184/4184 co-relation queries the response was YES. [2024-06-21 16:33:14,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 427 events. 239/427 cut-off events. For 4184/4184 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1589 event pairs, 49 based on Foata normal form. 2/428 useless extension candidates. Maximal degree in co-relation 1931. Up to 399 conditions per place. [2024-06-21 16:33:14,426 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 58 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-21 16:33:14,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 601 flow [2024-06-21 16:33:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 16:33:14,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 16:33:14,429 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 423 flow. Second operand 8 states and 88 transitions. [2024-06-21 16:33:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 601 flow [2024-06-21 16:33:14,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 576 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:14,436 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 447 flow [2024-06-21 16:33:14,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=447, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2024-06-21 16:33:14,436 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-21 16:33:14,436 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 447 flow [2024-06-21 16:33:14,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:14,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:14,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:14,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:33:14,437 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)] === [2024-06-21 16:33:14,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash 468218976, now seen corresponding path program 4 times [2024-06-21 16:33:14,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:14,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883900921] [2024-06-21 16:33:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:14,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:14,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883900921] [2024-06-21 16:33:14,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883900921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:14,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:14,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368928584] [2024-06-21 16:33:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:14,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:14,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 447 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:14,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:14,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:14,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:15,240 INFO L124 PetriNetUnfolderBase]: 233/418 cut-off events. [2024-06-21 16:33:15,240 INFO L125 PetriNetUnfolderBase]: For 4310/4310 co-relation queries the response was YES. [2024-06-21 16:33:15,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 418 events. 233/418 cut-off events. For 4310/4310 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1567 event pairs, 44 based on Foata normal form. 3/420 useless extension candidates. Maximal degree in co-relation 1895. Up to 370 conditions per place. [2024-06-21 16:33:15,243 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 59 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-21 16:33:15,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 631 flow [2024-06-21 16:33:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 16:33:15,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 16:33:15,244 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 447 flow. Second operand 8 states and 94 transitions. [2024-06-21 16:33:15,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 631 flow [2024-06-21 16:33:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 593 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:15,250 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 444 flow [2024-06-21 16:33:15,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-21 16:33:15,251 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-21 16:33:15,251 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 444 flow [2024-06-21 16:33:15,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:15,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:15,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:15,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:33:15,252 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)] === [2024-06-21 16:33:15,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1290067713, now seen corresponding path program 1 times [2024-06-21 16:33:15,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:15,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316248346] [2024-06-21 16:33:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:15,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:16,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316248346] [2024-06-21 16:33:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316248346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:16,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871538319] [2024-06-21 16:33:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:16,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:16,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:16,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 444 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:16,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:16,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:16,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:16,448 INFO L124 PetriNetUnfolderBase]: 230/413 cut-off events. [2024-06-21 16:33:16,448 INFO L125 PetriNetUnfolderBase]: For 4402/4402 co-relation queries the response was YES. [2024-06-21 16:33:16,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 413 events. 230/413 cut-off events. For 4402/4402 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1521 event pairs, 46 based on Foata normal form. 2/414 useless extension candidates. Maximal degree in co-relation 1868. Up to 387 conditions per place. [2024-06-21 16:33:16,451 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 59 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-21 16:33:16,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 72 transitions, 606 flow [2024-06-21 16:33:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 16:33:16,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-21 16:33:16,454 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 444 flow. Second operand 8 states and 86 transitions. [2024-06-21 16:33:16,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 72 transitions, 606 flow [2024-06-21 16:33:16,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 543 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:16,464 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 407 flow [2024-06-21 16:33:16,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=407, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-21 16:33:16,464 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-21 16:33:16,464 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 407 flow [2024-06-21 16:33:16,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:16,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:16,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:16,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:33:16,465 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)] === [2024-06-21 16:33:16,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1208104863, now seen corresponding path program 1 times [2024-06-21 16:33:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:16,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841602240] [2024-06-21 16:33:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:17,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841602240] [2024-06-21 16:33:17,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841602240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:17,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:17,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:17,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935580584] [2024-06-21 16:33:17,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:17,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:17,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:17,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:17,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 407 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:17,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:17,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:17,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:17,452 INFO L124 PetriNetUnfolderBase]: 234/421 cut-off events. [2024-06-21 16:33:17,453 INFO L125 PetriNetUnfolderBase]: For 4769/4769 co-relation queries the response was YES. [2024-06-21 16:33:17,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 421 events. 234/421 cut-off events. For 4769/4769 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1567 event pairs, 33 based on Foata normal form. 2/422 useless extension candidates. Maximal degree in co-relation 1865. Up to 320 conditions per place. [2024-06-21 16:33:17,455 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 60 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2024-06-21 16:33:17,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 651 flow [2024-06-21 16:33:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 16:33:17,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:33:17,456 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 407 flow. Second operand 8 states and 96 transitions. [2024-06-21 16:33:17,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 651 flow [2024-06-21 16:33:17,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 621 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:17,467 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 427 flow [2024-06-21 16:33:17,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-06-21 16:33:17,467 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2024-06-21 16:33:17,467 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 427 flow [2024-06-21 16:33:17,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:17,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:17,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:17,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:33:17,468 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)] === [2024-06-21 16:33:17,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1208044413, now seen corresponding path program 2 times [2024-06-21 16:33:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:17,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060032275] [2024-06-21 16:33:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:18,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:18,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060032275] [2024-06-21 16:33:18,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060032275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:18,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:18,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964155233] [2024-06-21 16:33:18,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:18,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:18,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:18,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:18,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 427 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:18,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:18,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:18,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:18,406 INFO L124 PetriNetUnfolderBase]: 231/416 cut-off events. [2024-06-21 16:33:18,406 INFO L125 PetriNetUnfolderBase]: For 4844/4844 co-relation queries the response was YES. [2024-06-21 16:33:18,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1884 conditions, 416 events. 231/416 cut-off events. For 4844/4844 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1543 event pairs, 49 based on Foata normal form. 2/417 useless extension candidates. Maximal degree in co-relation 1845. Up to 350 conditions per place. [2024-06-21 16:33:18,409 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 58 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-21 16:33:18,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 79 transitions, 619 flow [2024-06-21 16:33:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 16:33:18,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-21 16:33:18,410 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 427 flow. Second operand 9 states and 106 transitions. [2024-06-21 16:33:18,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 79 transitions, 619 flow [2024-06-21 16:33:18,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 576 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:18,416 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 426 flow [2024-06-21 16:33:18,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=426, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-06-21 16:33:18,417 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-06-21 16:33:18,417 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 426 flow [2024-06-21 16:33:18,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:18,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:18,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:18,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:33:18,417 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)] === [2024-06-21 16:33:18,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash -83998065, now seen corresponding path program 1 times [2024-06-21 16:33:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:18,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843910474] [2024-06-21 16:33:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:18,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:18,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:18,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843910474] [2024-06-21 16:33:18,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843910474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:18,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818360817] [2024-06-21 16:33:18,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:19,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:19,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 426 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:19,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:19,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:19,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:19,300 INFO L124 PetriNetUnfolderBase]: 250/447 cut-off events. [2024-06-21 16:33:19,300 INFO L125 PetriNetUnfolderBase]: For 6009/6009 co-relation queries the response was YES. [2024-06-21 16:33:19,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2036 conditions, 447 events. 250/447 cut-off events. For 6009/6009 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1701 event pairs, 45 based on Foata normal form. 3/449 useless extension candidates. Maximal degree in co-relation 1996. Up to 252 conditions per place. [2024-06-21 16:33:19,303 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 55 selfloop transitions, 35 changer transitions 0/92 dead transitions. [2024-06-21 16:33:19,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 740 flow [2024-06-21 16:33:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 16:33:19,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-06-21 16:33:19,304 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 426 flow. Second operand 10 states and 128 transitions. [2024-06-21 16:33:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 740 flow [2024-06-21 16:33:19,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 92 transitions, 688 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:33:19,312 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 505 flow [2024-06-21 16:33:19,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=505, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2024-06-21 16:33:19,313 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2024-06-21 16:33:19,313 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 505 flow [2024-06-21 16:33:19,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:19,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:19,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:19,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:33:19,314 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)] === [2024-06-21 16:33:19,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash 34089615, now seen corresponding path program 2 times [2024-06-21 16:33:19,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:19,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301836984] [2024-06-21 16:33:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:19,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301836984] [2024-06-21 16:33:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301836984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:19,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945288947] [2024-06-21 16:33:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:20,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:20,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 505 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:20,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:20,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:20,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:20,298 INFO L124 PetriNetUnfolderBase]: 259/462 cut-off events. [2024-06-21 16:33:20,298 INFO L125 PetriNetUnfolderBase]: For 6705/6705 co-relation queries the response was YES. [2024-06-21 16:33:20,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 462 events. 259/462 cut-off events. For 6705/6705 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1782 event pairs, 37 based on Foata normal form. 3/464 useless extension candidates. Maximal degree in co-relation 2218. Up to 280 conditions per place. [2024-06-21 16:33:20,303 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 60 selfloop transitions, 37 changer transitions 0/99 dead transitions. [2024-06-21 16:33:20,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 850 flow [2024-06-21 16:33:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-21 16:33:20,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-21 16:33:20,323 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 505 flow. Second operand 9 states and 124 transitions. [2024-06-21 16:33:20,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 850 flow [2024-06-21 16:33:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 792 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:20,335 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 555 flow [2024-06-21 16:33:20,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=555, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2024-06-21 16:33:20,336 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-06-21 16:33:20,336 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 555 flow [2024-06-21 16:33:20,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:20,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:20,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:33:20,336 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)] === [2024-06-21 16:33:20,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 34267245, now seen corresponding path program 3 times [2024-06-21 16:33:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865687380] [2024-06-21 16:33:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:20,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:20,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865687380] [2024-06-21 16:33:20,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865687380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:20,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:20,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:20,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523830027] [2024-06-21 16:33:20,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:20,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:20,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:20,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:20,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 555 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:20,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:20,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:20,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:21,226 INFO L124 PetriNetUnfolderBase]: 268/477 cut-off events. [2024-06-21 16:33:21,227 INFO L125 PetriNetUnfolderBase]: For 7395/7395 co-relation queries the response was YES. [2024-06-21 16:33:21,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 477 events. 268/477 cut-off events. For 7395/7395 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1857 event pairs, 46 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 2401. Up to 336 conditions per place. [2024-06-21 16:33:21,230 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 64 selfloop transitions, 28 changer transitions 0/94 dead transitions. [2024-06-21 16:33:21,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 94 transitions, 828 flow [2024-06-21 16:33:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 16:33:21,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2024-06-21 16:33:21,231 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 555 flow. Second operand 9 states and 113 transitions. [2024-06-21 16:33:21,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 94 transitions, 828 flow [2024-06-21 16:33:21,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 742 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:21,240 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 566 flow [2024-06-21 16:33:21,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=566, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-06-21 16:33:21,241 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-21 16:33:21,241 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 566 flow [2024-06-21 16:33:21,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:21,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:21,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:21,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:33:21,241 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)] === [2024-06-21 16:33:21,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2046658403, now seen corresponding path program 1 times [2024-06-21 16:33:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455502] [2024-06-21 16:33:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:21,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455502] [2024-06-21 16:33:21,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:21,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:21,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131319742] [2024-06-21 16:33:21,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:21,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:21,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:21,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 566 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:21,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:21,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:21,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:22,209 INFO L124 PetriNetUnfolderBase]: 264/471 cut-off events. [2024-06-21 16:33:22,209 INFO L125 PetriNetUnfolderBase]: For 7129/7129 co-relation queries the response was YES. [2024-06-21 16:33:22,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 471 events. 264/471 cut-off events. For 7129/7129 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1827 event pairs, 51 based on Foata normal form. 2/472 useless extension candidates. Maximal degree in co-relation 2318. Up to 435 conditions per place. [2024-06-21 16:33:22,213 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 73 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-21 16:33:22,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 780 flow [2024-06-21 16:33:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 16:33:22,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-06-21 16:33:22,214 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 566 flow. Second operand 9 states and 98 transitions. [2024-06-21 16:33:22,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 780 flow [2024-06-21 16:33:22,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 720 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:22,224 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 557 flow [2024-06-21 16:33:22,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=557, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2024-06-21 16:33:22,224 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-06-21 16:33:22,224 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 557 flow [2024-06-21 16:33:22,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:22,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:22,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:22,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:33:22,225 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)] === [2024-06-21 16:33:22,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1857788347, now seen corresponding path program 4 times [2024-06-21 16:33:22,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:22,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200216034] [2024-06-21 16:33:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:22,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:22,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:22,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200216034] [2024-06-21 16:33:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200216034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:22,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:22,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264645106] [2024-06-21 16:33:22,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:22,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:22,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:22,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:22,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 557 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:22,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:22,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:22,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:23,131 INFO L124 PetriNetUnfolderBase]: 273/486 cut-off events. [2024-06-21 16:33:23,131 INFO L125 PetriNetUnfolderBase]: For 7829/7829 co-relation queries the response was YES. [2024-06-21 16:33:23,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2412 conditions, 486 events. 273/486 cut-off events. For 7829/7829 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1909 event pairs, 51 based on Foata normal form. 3/488 useless extension candidates. Maximal degree in co-relation 2367. Up to 439 conditions per place. [2024-06-21 16:33:23,134 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 77 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2024-06-21 16:33:23,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 812 flow [2024-06-21 16:33:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 16:33:23,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2024-06-21 16:33:23,136 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 557 flow. Second operand 9 states and 101 transitions. [2024-06-21 16:33:23,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 812 flow [2024-06-21 16:33:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 94 transitions, 777 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:23,145 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 593 flow [2024-06-21 16:33:23,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=593, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2024-06-21 16:33:23,146 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2024-06-21 16:33:23,146 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 593 flow [2024-06-21 16:33:23,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:23,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:23,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:23,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:33:23,146 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)] === [2024-06-21 16:33:23,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1573882217, now seen corresponding path program 5 times [2024-06-21 16:33:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:23,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034889507] [2024-06-21 16:33:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:23,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:23,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034889507] [2024-06-21 16:33:23,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034889507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:23,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:23,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:23,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976397995] [2024-06-21 16:33:23,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:23,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:23,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:23,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:23,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 593 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:23,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:23,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:23,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:24,096 INFO L124 PetriNetUnfolderBase]: 267/477 cut-off events. [2024-06-21 16:33:24,096 INFO L125 PetriNetUnfolderBase]: For 7509/7509 co-relation queries the response was YES. [2024-06-21 16:33:24,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2335 conditions, 477 events. 267/477 cut-off events. For 7509/7509 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1886 event pairs, 46 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 2289. Up to 418 conditions per place. [2024-06-21 16:33:24,099 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 76 selfloop transitions, 18 changer transitions 0/96 dead transitions. [2024-06-21 16:33:24,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 96 transitions, 833 flow [2024-06-21 16:33:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 16:33:24,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:33:24,100 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 593 flow. Second operand 9 states and 105 transitions. [2024-06-21 16:33:24,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 96 transitions, 833 flow [2024-06-21 16:33:24,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 96 transitions, 787 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:24,110 INFO L231 Difference]: Finished difference. Result has 95 places, 80 transitions, 589 flow [2024-06-21 16:33:24,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=589, PETRI_PLACES=95, PETRI_TRANSITIONS=80} [2024-06-21 16:33:24,111 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-21 16:33:24,111 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 80 transitions, 589 flow [2024-06-21 16:33:24,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:24,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:24,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:24,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:33:24,111 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)] === [2024-06-21 16:33:24,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1689150471, now seen corresponding path program 1 times [2024-06-21 16:33:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566860176] [2024-06-21 16:33:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:24,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566860176] [2024-06-21 16:33:24,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566860176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:24,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:24,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:24,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416384895] [2024-06-21 16:33:24,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:24,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:24,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:24,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:24,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 80 transitions, 589 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:24,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:24,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:24,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:24,899 INFO L124 PetriNetUnfolderBase]: 314/570 cut-off events. [2024-06-21 16:33:24,911 INFO L125 PetriNetUnfolderBase]: For 12864/12864 co-relation queries the response was YES. [2024-06-21 16:33:24,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3010 conditions, 570 events. 314/570 cut-off events. For 12864/12864 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2391 event pairs, 45 based on Foata normal form. 2/571 useless extension candidates. Maximal degree in co-relation 2963. Up to 186 conditions per place. [2024-06-21 16:33:24,915 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 66 selfloop transitions, 41 changer transitions 0/109 dead transitions. [2024-06-21 16:33:24,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 109 transitions, 963 flow [2024-06-21 16:33:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 16:33:24,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-21 16:33:24,920 INFO L175 Difference]: Start difference. First operand has 95 places, 80 transitions, 589 flow. Second operand 9 states and 118 transitions. [2024-06-21 16:33:24,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 109 transitions, 963 flow [2024-06-21 16:33:24,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 901 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:24,934 INFO L231 Difference]: Finished difference. Result has 96 places, 82 transitions, 631 flow [2024-06-21 16:33:24,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=631, PETRI_PLACES=96, PETRI_TRANSITIONS=82} [2024-06-21 16:33:24,939 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2024-06-21 16:33:24,939 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 82 transitions, 631 flow [2024-06-21 16:33:24,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:24,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:24,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:24,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:33:24,940 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)] === [2024-06-21 16:33:24,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1691028141, now seen corresponding path program 2 times [2024-06-21 16:33:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:24,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788777559] [2024-06-21 16:33:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:24,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:25,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788777559] [2024-06-21 16:33:25,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788777559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:25,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759656677] [2024-06-21 16:33:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:25,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:25,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:25,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:25,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 82 transitions, 631 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:25,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:25,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:25,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:26,086 INFO L124 PetriNetUnfolderBase]: 342/630 cut-off events. [2024-06-21 16:33:26,087 INFO L125 PetriNetUnfolderBase]: For 19377/19377 co-relation queries the response was YES. [2024-06-21 16:33:26,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 630 events. 342/630 cut-off events. For 19377/19377 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2789 event pairs, 67 based on Foata normal form. 16/645 useless extension candidates. Maximal degree in co-relation 3258. Up to 360 conditions per place. [2024-06-21 16:33:26,098 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 59 selfloop transitions, 45 changer transitions 6/112 dead transitions. [2024-06-21 16:33:26,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 112 transitions, 963 flow [2024-06-21 16:33:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 16:33:26,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2024-06-21 16:33:26,100 INFO L175 Difference]: Start difference. First operand has 96 places, 82 transitions, 631 flow. Second operand 11 states and 142 transitions. [2024-06-21 16:33:26,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 112 transitions, 963 flow [2024-06-21 16:33:26,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 112 transitions, 870 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:26,119 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 660 flow [2024-06-21 16:33:26,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=660, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2024-06-21 16:33:26,121 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 71 predicate places. [2024-06-21 16:33:26,121 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 660 flow [2024-06-21 16:33:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:26,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:26,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:26,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:33:26,122 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)] === [2024-06-21 16:33:26,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1691028296, now seen corresponding path program 1 times [2024-06-21 16:33:26,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:26,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265985163] [2024-06-21 16:33:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:26,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:26,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:26,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265985163] [2024-06-21 16:33:26,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265985163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:26,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:26,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902852614] [2024-06-21 16:33:26,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:26,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:26,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:26,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:26,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:26,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:26,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:27,137 INFO L124 PetriNetUnfolderBase]: 352/648 cut-off events. [2024-06-21 16:33:27,138 INFO L125 PetriNetUnfolderBase]: For 15012/15012 co-relation queries the response was YES. [2024-06-21 16:33:27,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 648 events. 352/648 cut-off events. For 15012/15012 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2881 event pairs, 66 based on Foata normal form. 2/649 useless extension candidates. Maximal degree in co-relation 3340. Up to 389 conditions per place. [2024-06-21 16:33:27,144 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 65 selfloop transitions, 44 changer transitions 0/111 dead transitions. [2024-06-21 16:33:27,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 111 transitions, 1056 flow [2024-06-21 16:33:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 16:33:27,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-21 16:33:27,145 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 660 flow. Second operand 9 states and 116 transitions. [2024-06-21 16:33:27,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 111 transitions, 1056 flow [2024-06-21 16:33:27,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 111 transitions, 953 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:33:27,164 INFO L231 Difference]: Finished difference. Result has 102 places, 91 transitions, 738 flow [2024-06-21 16:33:27,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=738, PETRI_PLACES=102, PETRI_TRANSITIONS=91} [2024-06-21 16:33:27,164 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-21 16:33:27,164 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 91 transitions, 738 flow [2024-06-21 16:33:27,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:27,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:27,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:27,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:33:27,165 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)] === [2024-06-21 16:33:27,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1691024421, now seen corresponding path program 3 times [2024-06-21 16:33:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230973662] [2024-06-21 16:33:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:27,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:27,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230973662] [2024-06-21 16:33:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230973662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:27,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:27,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:27,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565252642] [2024-06-21 16:33:27,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:27,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:27,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:27,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:27,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 91 transitions, 738 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:27,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:27,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:27,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:28,160 INFO L124 PetriNetUnfolderBase]: 356/656 cut-off events. [2024-06-21 16:33:28,160 INFO L125 PetriNetUnfolderBase]: For 16082/16082 co-relation queries the response was YES. [2024-06-21 16:33:28,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3479 conditions, 656 events. 356/656 cut-off events. For 16082/16082 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2948 event pairs, 68 based on Foata normal form. 2/657 useless extension candidates. Maximal degree in co-relation 3429. Up to 366 conditions per place. [2024-06-21 16:33:28,164 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 65 selfloop transitions, 48 changer transitions 5/120 dead transitions. [2024-06-21 16:33:28,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 120 transitions, 1069 flow [2024-06-21 16:33:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 16:33:28,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-06-21 16:33:28,165 INFO L175 Difference]: Start difference. First operand has 102 places, 91 transitions, 738 flow. Second operand 10 states and 134 transitions. [2024-06-21 16:33:28,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 120 transitions, 1069 flow [2024-06-21 16:33:28,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 120 transitions, 1014 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:28,187 INFO L231 Difference]: Finished difference. Result has 109 places, 92 transitions, 796 flow [2024-06-21 16:33:28,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=796, PETRI_PLACES=109, PETRI_TRANSITIONS=92} [2024-06-21 16:33:28,187 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2024-06-21 16:33:28,187 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 92 transitions, 796 flow [2024-06-21 16:33:28,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:28,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:28,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:28,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:33:28,188 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)] === [2024-06-21 16:33:28,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1777864256, now seen corresponding path program 2 times [2024-06-21 16:33:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:28,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190262127] [2024-06-21 16:33:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:28,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:28,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190262127] [2024-06-21 16:33:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190262127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:28,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:28,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:28,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551139956] [2024-06-21 16:33:28,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:28,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:28,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:28,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:28,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:28,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:28,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 92 transitions, 796 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:28,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:28,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:28,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:29,171 INFO L124 PetriNetUnfolderBase]: 365/671 cut-off events. [2024-06-21 16:33:29,171 INFO L125 PetriNetUnfolderBase]: For 17127/17127 co-relation queries the response was YES. [2024-06-21 16:33:29,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3688 conditions, 671 events. 365/671 cut-off events. For 17127/17127 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3041 event pairs, 64 based on Foata normal form. 2/672 useless extension candidates. Maximal degree in co-relation 3636. Up to 502 conditions per place. [2024-06-21 16:33:29,175 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 78 selfloop transitions, 33 changer transitions 1/114 dead transitions. [2024-06-21 16:33:29,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 1105 flow [2024-06-21 16:33:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 16:33:29,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2024-06-21 16:33:29,191 INFO L175 Difference]: Start difference. First operand has 109 places, 92 transitions, 796 flow. Second operand 9 states and 113 transitions. [2024-06-21 16:33:29,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 1105 flow [2024-06-21 16:33:29,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 114 transitions, 1003 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:29,213 INFO L231 Difference]: Finished difference. Result has 111 places, 96 transitions, 819 flow [2024-06-21 16:33:29,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=819, PETRI_PLACES=111, PETRI_TRANSITIONS=96} [2024-06-21 16:33:29,215 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 82 predicate places. [2024-06-21 16:33:29,215 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 96 transitions, 819 flow [2024-06-21 16:33:29,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:29,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:29,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:29,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:33:29,216 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)] === [2024-06-21 16:33:29,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1777720106, now seen corresponding path program 3 times [2024-06-21 16:33:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:29,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27704726] [2024-06-21 16:33:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:29,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:29,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27704726] [2024-06-21 16:33:29,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27704726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:29,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:29,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:29,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304963603] [2024-06-21 16:33:29,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:29,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:30,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:30,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 96 transitions, 819 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:30,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:30,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:30,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:30,279 INFO L124 PetriNetUnfolderBase]: 443/805 cut-off events. [2024-06-21 16:33:30,279 INFO L125 PetriNetUnfolderBase]: For 18740/18740 co-relation queries the response was YES. [2024-06-21 16:33:30,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4372 conditions, 805 events. 443/805 cut-off events. For 18740/18740 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3794 event pairs, 95 based on Foata normal form. 2/806 useless extension candidates. Maximal degree in co-relation 4318. Up to 630 conditions per place. [2024-06-21 16:33:30,283 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 98 selfloop transitions, 39 changer transitions 0/139 dead transitions. [2024-06-21 16:33:30,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 139 transitions, 1411 flow [2024-06-21 16:33:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:33:30,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:33:30,284 INFO L175 Difference]: Start difference. First operand has 111 places, 96 transitions, 819 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:33:30,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 139 transitions, 1411 flow [2024-06-21 16:33:30,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 139 transitions, 1289 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:30,311 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 1115 flow [2024-06-21 16:33:30,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1115, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2024-06-21 16:33:30,312 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 91 predicate places. [2024-06-21 16:33:30,312 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 1115 flow [2024-06-21 16:33:30,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:30,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:30,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:30,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:33:30,312 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)] === [2024-06-21 16:33:30,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1056775205, now seen corresponding path program 4 times [2024-06-21 16:33:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:30,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50854116] [2024-06-21 16:33:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50854116] [2024-06-21 16:33:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50854116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:30,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:30,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619195707] [2024-06-21 16:33:30,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:30,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:30,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:31,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:31,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 1115 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:31,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:31,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:31,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:31,363 INFO L124 PetriNetUnfolderBase]: 469/858 cut-off events. [2024-06-21 16:33:31,364 INFO L125 PetriNetUnfolderBase]: For 24148/24150 co-relation queries the response was YES. [2024-06-21 16:33:31,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4922 conditions, 858 events. 469/858 cut-off events. For 24148/24150 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4102 event pairs, 70 based on Foata normal form. 4/861 useless extension candidates. Maximal degree in co-relation 4862. Up to 441 conditions per place. [2024-06-21 16:33:31,370 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 90 selfloop transitions, 57 changer transitions 0/149 dead transitions. [2024-06-21 16:33:31,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 149 transitions, 1578 flow [2024-06-21 16:33:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-21 16:33:31,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 16:33:31,372 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 1115 flow. Second operand 9 states and 126 transitions. [2024-06-21 16:33:31,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 149 transitions, 1578 flow [2024-06-21 16:33:31,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 149 transitions, 1525 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 16:33:31,408 INFO L231 Difference]: Finished difference. Result has 127 places, 120 transitions, 1189 flow [2024-06-21 16:33:31,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1189, PETRI_PLACES=127, PETRI_TRANSITIONS=120} [2024-06-21 16:33:31,409 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2024-06-21 16:33:31,409 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 120 transitions, 1189 flow [2024-06-21 16:33:31,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:31,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:31,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:31,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:33:31,410 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)] === [2024-06-21 16:33:31,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash 571084349, now seen corresponding path program 5 times [2024-06-21 16:33:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:31,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267999334] [2024-06-21 16:33:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267999334] [2024-06-21 16:33:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267999334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:31,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:31,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517072371] [2024-06-21 16:33:31,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:32,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:32,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 120 transitions, 1189 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:32,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:32,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:32,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:32,281 INFO L124 PetriNetUnfolderBase]: 476/871 cut-off events. [2024-06-21 16:33:32,281 INFO L125 PetriNetUnfolderBase]: For 25809/25811 co-relation queries the response was YES. [2024-06-21 16:33:32,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5121 conditions, 871 events. 476/871 cut-off events. For 25809/25811 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4184 event pairs, 110 based on Foata normal form. 4/874 useless extension candidates. Maximal degree in co-relation 5059. Up to 730 conditions per place. [2024-06-21 16:33:32,286 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 109 selfloop transitions, 45 changer transitions 2/158 dead transitions. [2024-06-21 16:33:32,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 158 transitions, 1773 flow [2024-06-21 16:33:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 16:33:32,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2024-06-21 16:33:32,287 INFO L175 Difference]: Start difference. First operand has 127 places, 120 transitions, 1189 flow. Second operand 9 states and 113 transitions. [2024-06-21 16:33:32,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 158 transitions, 1773 flow [2024-06-21 16:33:32,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 158 transitions, 1603 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:32,332 INFO L231 Difference]: Finished difference. Result has 132 places, 138 transitions, 1394 flow [2024-06-21 16:33:32,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1394, PETRI_PLACES=132, PETRI_TRANSITIONS=138} [2024-06-21 16:33:32,332 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2024-06-21 16:33:32,333 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 138 transitions, 1394 flow [2024-06-21 16:33:32,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:32,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:32,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:32,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:33:32,333 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)] === [2024-06-21 16:33:32,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:32,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1056779080, now seen corresponding path program 4 times [2024-06-21 16:33:32,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:32,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312493100] [2024-06-21 16:33:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:32,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312493100] [2024-06-21 16:33:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312493100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:33,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:33,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870366853] [2024-06-21 16:33:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:33,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:33,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:33,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:33,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 138 transitions, 1394 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:33,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:33,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:33,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:33,470 INFO L124 PetriNetUnfolderBase]: 439/798 cut-off events. [2024-06-21 16:33:33,470 INFO L125 PetriNetUnfolderBase]: For 22459/22461 co-relation queries the response was YES. [2024-06-21 16:33:33,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 798 events. 439/798 cut-off events. For 22459/22461 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3730 event pairs, 74 based on Foata normal form. 4/801 useless extension candidates. Maximal degree in co-relation 4625. Up to 514 conditions per place. [2024-06-21 16:33:33,474 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 94 selfloop transitions, 73 changer transitions 0/169 dead transitions. [2024-06-21 16:33:33,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 169 transitions, 1931 flow [2024-06-21 16:33:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 16:33:33,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2024-06-21 16:33:33,476 INFO L175 Difference]: Start difference. First operand has 132 places, 138 transitions, 1394 flow. Second operand 11 states and 142 transitions. [2024-06-21 16:33:33,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 169 transitions, 1931 flow [2024-06-21 16:33:33,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 1909 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 16:33:33,514 INFO L231 Difference]: Finished difference. Result has 142 places, 143 transitions, 1601 flow [2024-06-21 16:33:33,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1601, PETRI_PLACES=142, PETRI_TRANSITIONS=143} [2024-06-21 16:33:33,514 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2024-06-21 16:33:33,515 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 143 transitions, 1601 flow [2024-06-21 16:33:33,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:33,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:33,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:33,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:33:33,515 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)] === [2024-06-21 16:33:33,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash 726042165, now seen corresponding path program 6 times [2024-06-21 16:33:33,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:33,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670830313] [2024-06-21 16:33:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:33,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:34,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:34,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670830313] [2024-06-21 16:33:34,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670830313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:34,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:34,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:34,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573787485] [2024-06-21 16:33:34,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:34,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:34,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 143 transitions, 1601 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:34,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:34,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:34,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:34,455 INFO L124 PetriNetUnfolderBase]: 463/850 cut-off events. [2024-06-21 16:33:34,455 INFO L125 PetriNetUnfolderBase]: For 31916/31918 co-relation queries the response was YES. [2024-06-21 16:33:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5082 conditions, 850 events. 463/850 cut-off events. For 31916/31918 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4111 event pairs, 80 based on Foata normal form. 16/865 useless extension candidates. Maximal degree in co-relation 5013. Up to 586 conditions per place. [2024-06-21 16:33:34,461 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 103 selfloop transitions, 49 changer transitions 14/168 dead transitions. [2024-06-21 16:33:34,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 168 transitions, 2022 flow [2024-06-21 16:33:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 16:33:34,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-21 16:33:34,463 INFO L175 Difference]: Start difference. First operand has 142 places, 143 transitions, 1601 flow. Second operand 9 states and 121 transitions. [2024-06-21 16:33:34,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 168 transitions, 2022 flow [2024-06-21 16:33:34,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 168 transitions, 1883 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:34,520 INFO L231 Difference]: Finished difference. Result has 144 places, 137 transitions, 1507 flow [2024-06-21 16:33:34,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1507, PETRI_PLACES=144, PETRI_TRANSITIONS=137} [2024-06-21 16:33:34,521 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2024-06-21 16:33:34,521 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 137 transitions, 1507 flow [2024-06-21 16:33:34,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:34,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:34,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:34,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:33:34,522 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)] === [2024-06-21 16:33:34,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1062285455, now seen corresponding path program 7 times [2024-06-21 16:33:34,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:34,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139824128] [2024-06-21 16:33:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:34,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:35,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:35,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139824128] [2024-06-21 16:33:35,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139824128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:35,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:35,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201911111] [2024-06-21 16:33:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:35,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:35,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:35,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 137 transitions, 1507 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:35,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:35,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:35,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:35,493 INFO L124 PetriNetUnfolderBase]: 445/825 cut-off events. [2024-06-21 16:33:35,493 INFO L125 PetriNetUnfolderBase]: For 33265/33265 co-relation queries the response was YES. [2024-06-21 16:33:35,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4992 conditions, 825 events. 445/825 cut-off events. For 33265/33265 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3950 event pairs, 79 based on Foata normal form. 14/838 useless extension candidates. Maximal degree in co-relation 4921. Up to 572 conditions per place. [2024-06-21 16:33:35,498 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 105 selfloop transitions, 39 changer transitions 16/162 dead transitions. [2024-06-21 16:33:35,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 162 transitions, 1922 flow [2024-06-21 16:33:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 16:33:35,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2024-06-21 16:33:35,525 INFO L175 Difference]: Start difference. First operand has 144 places, 137 transitions, 1507 flow. Second operand 10 states and 127 transitions. [2024-06-21 16:33:35,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 162 transitions, 1922 flow [2024-06-21 16:33:35,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 162 transitions, 1793 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:35,574 INFO L231 Difference]: Finished difference. Result has 145 places, 130 transitions, 1385 flow [2024-06-21 16:33:35,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1385, PETRI_PLACES=145, PETRI_TRANSITIONS=130} [2024-06-21 16:33:35,574 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2024-06-21 16:33:35,574 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 130 transitions, 1385 flow [2024-06-21 16:33:35,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:35,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:35,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:35,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:33:35,575 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)] === [2024-06-21 16:33:35,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 576591034, now seen corresponding path program 5 times [2024-06-21 16:33:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321900704] [2024-06-21 16:33:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:36,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:36,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321900704] [2024-06-21 16:33:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321900704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:36,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:36,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437876418] [2024-06-21 16:33:36,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:36,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:36,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:36,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:36,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 130 transitions, 1385 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:36,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:36,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:36,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:36,619 INFO L124 PetriNetUnfolderBase]: 405/761 cut-off events. [2024-06-21 16:33:36,620 INFO L125 PetriNetUnfolderBase]: For 26290/26290 co-relation queries the response was YES. [2024-06-21 16:33:36,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 761 events. 405/761 cut-off events. For 26290/26290 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3633 event pairs, 75 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 4574. Up to 582 conditions per place. [2024-06-21 16:33:36,624 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 106 selfloop transitions, 40 changer transitions 3/151 dead transitions. [2024-06-21 16:33:36,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 151 transitions, 1767 flow [2024-06-21 16:33:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:33:36,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-21 16:33:36,641 INFO L175 Difference]: Start difference. First operand has 145 places, 130 transitions, 1385 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:33:36,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 151 transitions, 1767 flow [2024-06-21 16:33:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 151 transitions, 1681 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:36,678 INFO L231 Difference]: Finished difference. Result has 149 places, 132 transitions, 1428 flow [2024-06-21 16:33:36,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1428, PETRI_PLACES=149, PETRI_TRANSITIONS=132} [2024-06-21 16:33:36,678 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2024-06-21 16:33:36,678 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 132 transitions, 1428 flow [2024-06-21 16:33:36,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:36,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:36,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:36,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:33:36,679 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)] === [2024-06-21 16:33:36,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1234806018, now seen corresponding path program 6 times [2024-06-21 16:33:36,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:36,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714987758] [2024-06-21 16:33:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:37,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714987758] [2024-06-21 16:33:37,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714987758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:37,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:37,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809775955] [2024-06-21 16:33:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:37,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:37,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 132 transitions, 1428 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:37,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:37,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:37,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:37,806 INFO L124 PetriNetUnfolderBase]: 417/775 cut-off events. [2024-06-21 16:33:37,806 INFO L125 PetriNetUnfolderBase]: For 29489/29489 co-relation queries the response was YES. [2024-06-21 16:33:37,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4900 conditions, 775 events. 417/775 cut-off events. For 29489/29489 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3665 event pairs, 83 based on Foata normal form. 2/776 useless extension candidates. Maximal degree in co-relation 4827. Up to 687 conditions per place. [2024-06-21 16:33:37,829 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 123 selfloop transitions, 28 changer transitions 0/153 dead transitions. [2024-06-21 16:33:37,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 153 transitions, 1924 flow [2024-06-21 16:33:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 16:33:37,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-21 16:33:37,831 INFO L175 Difference]: Start difference. First operand has 149 places, 132 transitions, 1428 flow. Second operand 10 states and 114 transitions. [2024-06-21 16:33:37,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 153 transitions, 1924 flow [2024-06-21 16:33:37,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 153 transitions, 1825 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:37,880 INFO L231 Difference]: Finished difference. Result has 151 places, 136 transitions, 1479 flow [2024-06-21 16:33:37,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1479, PETRI_PLACES=151, PETRI_TRANSITIONS=136} [2024-06-21 16:33:37,881 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-06-21 16:33:37,881 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 136 transitions, 1479 flow [2024-06-21 16:33:37,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:37,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:37,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:37,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:33:37,882 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)] === [2024-06-21 16:33:37,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:37,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2022777530, now seen corresponding path program 1 times [2024-06-21 16:33:37,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:37,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424799476] [2024-06-21 16:33:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:37,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:38,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:38,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424799476] [2024-06-21 16:33:38,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424799476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:38,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:38,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:38,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094858037] [2024-06-21 16:33:38,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:38,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:38,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:38,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:38,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:38,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 136 transitions, 1479 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:38,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:38,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:38,880 INFO L124 PetriNetUnfolderBase]: 421/783 cut-off events. [2024-06-21 16:33:38,881 INFO L125 PetriNetUnfolderBase]: For 30788/30788 co-relation queries the response was YES. [2024-06-21 16:33:38,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4960 conditions, 783 events. 421/783 cut-off events. For 30788/30788 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3720 event pairs, 89 based on Foata normal form. 2/784 useless extension candidates. Maximal degree in co-relation 4885. Up to 747 conditions per place. [2024-06-21 16:33:38,885 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 132 selfloop transitions, 14 changer transitions 0/148 dead transitions. [2024-06-21 16:33:38,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 148 transitions, 1809 flow [2024-06-21 16:33:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 16:33:38,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2024-06-21 16:33:38,886 INFO L175 Difference]: Start difference. First operand has 151 places, 136 transitions, 1479 flow. Second operand 9 states and 97 transitions. [2024-06-21 16:33:38,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 148 transitions, 1809 flow [2024-06-21 16:33:38,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 1739 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:38,944 INFO L231 Difference]: Finished difference. Result has 153 places, 137 transitions, 1457 flow [2024-06-21 16:33:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1457, PETRI_PLACES=153, PETRI_TRANSITIONS=137} [2024-06-21 16:33:38,944 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2024-06-21 16:33:38,944 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 137 transitions, 1457 flow [2024-06-21 16:33:38,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:38,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:38,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:33:38,945 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)] === [2024-06-21 16:33:38,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1545492130, now seen corresponding path program 2 times [2024-06-21 16:33:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:38,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472076770] [2024-06-21 16:33:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:38,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:39,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472076770] [2024-06-21 16:33:39,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472076770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:39,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146413827] [2024-06-21 16:33:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:39,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:39,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 137 transitions, 1457 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:39,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:39,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:39,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:40,013 INFO L124 PetriNetUnfolderBase]: 425/791 cut-off events. [2024-06-21 16:33:40,013 INFO L125 PetriNetUnfolderBase]: For 32184/32184 co-relation queries the response was YES. [2024-06-21 16:33:40,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4982 conditions, 791 events. 425/791 cut-off events. For 32184/32184 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3776 event pairs, 92 based on Foata normal form. 2/792 useless extension candidates. Maximal degree in co-relation 4906. Up to 748 conditions per place. [2024-06-21 16:33:40,019 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 131 selfloop transitions, 18 changer transitions 0/151 dead transitions. [2024-06-21 16:33:40,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 151 transitions, 1803 flow [2024-06-21 16:33:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 16:33:40,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 16:33:40,020 INFO L175 Difference]: Start difference. First operand has 153 places, 137 transitions, 1457 flow. Second operand 9 states and 100 transitions. [2024-06-21 16:33:40,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 151 transitions, 1803 flow [2024-06-21 16:33:40,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 151 transitions, 1765 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:40,072 INFO L231 Difference]: Finished difference. Result has 156 places, 139 transitions, 1486 flow [2024-06-21 16:33:40,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1486, PETRI_PLACES=156, PETRI_TRANSITIONS=139} [2024-06-21 16:33:40,076 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2024-06-21 16:33:40,076 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 139 transitions, 1486 flow [2024-06-21 16:33:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:40,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:40,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:40,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:33:40,085 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)] === [2024-06-21 16:33:40,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1545707611, now seen corresponding path program 8 times [2024-06-21 16:33:40,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:40,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349666725] [2024-06-21 16:33:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:40,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:40,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:40,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349666725] [2024-06-21 16:33:40,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349666725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:40,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:40,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:40,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84663156] [2024-06-21 16:33:40,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:40,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:40,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:40,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:40,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:40,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 139 transitions, 1486 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:40,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:40,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:40,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:41,174 INFO L124 PetriNetUnfolderBase]: 449/843 cut-off events. [2024-06-21 16:33:41,175 INFO L125 PetriNetUnfolderBase]: For 44192/44192 co-relation queries the response was YES. [2024-06-21 16:33:41,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5196 conditions, 843 events. 449/843 cut-off events. For 44192/44192 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4127 event pairs, 96 based on Foata normal form. 14/856 useless extension candidates. Maximal degree in co-relation 5118. Up to 724 conditions per place. [2024-06-21 16:33:41,179 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 127 selfloop transitions, 19 changer transitions 13/161 dead transitions. [2024-06-21 16:33:41,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 161 transitions, 1893 flow [2024-06-21 16:33:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 16:33:41,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-21 16:33:41,180 INFO L175 Difference]: Start difference. First operand has 156 places, 139 transitions, 1486 flow. Second operand 10 states and 119 transitions. [2024-06-21 16:33:41,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 161 transitions, 1893 flow [2024-06-21 16:33:41,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 161 transitions, 1845 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:41,238 INFO L231 Difference]: Finished difference. Result has 160 places, 135 transitions, 1444 flow [2024-06-21 16:33:41,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1444, PETRI_PLACES=160, PETRI_TRANSITIONS=135} [2024-06-21 16:33:41,239 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2024-06-21 16:33:41,239 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 135 transitions, 1444 flow [2024-06-21 16:33:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:41,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:41,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:41,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:33:41,240 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)] === [2024-06-21 16:33:41,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1100064600, now seen corresponding path program 3 times [2024-06-21 16:33:41,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:41,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619352389] [2024-06-21 16:33:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:41,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:41,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:41,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619352389] [2024-06-21 16:33:41,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619352389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:41,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:41,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:41,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756835434] [2024-06-21 16:33:41,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:41,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:41,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:41,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:41,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:41,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 135 transitions, 1444 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:41,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:41,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:41,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:42,176 INFO L124 PetriNetUnfolderBase]: 417/787 cut-off events. [2024-06-21 16:33:42,177 INFO L125 PetriNetUnfolderBase]: For 35209/35209 co-relation queries the response was YES. [2024-06-21 16:33:42,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5005 conditions, 787 events. 417/787 cut-off events. For 35209/35209 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3818 event pairs, 85 based on Foata normal form. 2/788 useless extension candidates. Maximal degree in co-relation 4926. Up to 751 conditions per place. [2024-06-21 16:33:42,181 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 132 selfloop transitions, 13 changer transitions 0/147 dead transitions. [2024-06-21 16:33:42,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 147 transitions, 1776 flow [2024-06-21 16:33:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 16:33:42,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-21 16:33:42,182 INFO L175 Difference]: Start difference. First operand has 160 places, 135 transitions, 1444 flow. Second operand 9 states and 95 transitions. [2024-06-21 16:33:42,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 147 transitions, 1776 flow [2024-06-21 16:33:42,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 147 transitions, 1728 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:42,241 INFO L231 Difference]: Finished difference. Result has 161 places, 136 transitions, 1446 flow [2024-06-21 16:33:42,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1446, PETRI_PLACES=161, PETRI_TRANSITIONS=136} [2024-06-21 16:33:42,242 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 132 predicate places. [2024-06-21 16:33:42,242 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 136 transitions, 1446 flow [2024-06-21 16:33:42,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:42,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:42,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:42,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:33:42,242 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)] === [2024-06-21 16:33:42,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1344410816, now seen corresponding path program 7 times [2024-06-21 16:33:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:42,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487397259] [2024-06-21 16:33:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:42,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:42,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487397259] [2024-06-21 16:33:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487397259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:42,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:42,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834555900] [2024-06-21 16:33:42,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:42,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:42,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 136 transitions, 1446 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:42,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:42,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:42,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:43,226 INFO L124 PetriNetUnfolderBase]: 413/781 cut-off events. [2024-06-21 16:33:43,226 INFO L125 PetriNetUnfolderBase]: For 34762/34762 co-relation queries the response was YES. [2024-06-21 16:33:43,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4893 conditions, 781 events. 413/781 cut-off events. For 34762/34762 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3785 event pairs, 87 based on Foata normal form. 2/782 useless extension candidates. Maximal degree in co-relation 4813. Up to 735 conditions per place. [2024-06-21 16:33:43,231 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 130 selfloop transitions, 17 changer transitions 0/149 dead transitions. [2024-06-21 16:33:43,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 149 transitions, 1768 flow [2024-06-21 16:33:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 16:33:43,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-21 16:33:43,235 INFO L175 Difference]: Start difference. First operand has 161 places, 136 transitions, 1446 flow. Second operand 10 states and 108 transitions. [2024-06-21 16:33:43,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 149 transitions, 1768 flow [2024-06-21 16:33:43,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 149 transitions, 1710 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:43,293 INFO L231 Difference]: Finished difference. Result has 164 places, 136 transitions, 1427 flow [2024-06-21 16:33:43,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1427, PETRI_PLACES=164, PETRI_TRANSITIONS=136} [2024-06-21 16:33:43,296 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 135 predicate places. [2024-06-21 16:33:43,296 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 136 transitions, 1427 flow [2024-06-21 16:33:43,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:43,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:43,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:43,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:33:43,296 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)] === [2024-06-21 16:33:43,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:43,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1013103430, now seen corresponding path program 8 times [2024-06-21 16:33:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:43,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739467571] [2024-06-21 16:33:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:43,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739467571] [2024-06-21 16:33:43,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739467571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:43,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:43,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:43,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642135008] [2024-06-21 16:33:43,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:43,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:43,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:44,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:44,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 136 transitions, 1427 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:44,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:44,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:44,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:44,369 INFO L124 PetriNetUnfolderBase]: 409/775 cut-off events. [2024-06-21 16:33:44,369 INFO L125 PetriNetUnfolderBase]: For 34093/34093 co-relation queries the response was YES. [2024-06-21 16:33:44,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4758 conditions, 775 events. 409/775 cut-off events. For 34093/34093 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3754 event pairs, 84 based on Foata normal form. 2/776 useless extension candidates. Maximal degree in co-relation 4677. Up to 706 conditions per place. [2024-06-21 16:33:44,375 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 125 selfloop transitions, 23 changer transitions 2/152 dead transitions. [2024-06-21 16:33:44,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 152 transitions, 1771 flow [2024-06-21 16:33:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 16:33:44,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-21 16:33:44,376 INFO L175 Difference]: Start difference. First operand has 164 places, 136 transitions, 1427 flow. Second operand 10 states and 114 transitions. [2024-06-21 16:33:44,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 152 transitions, 1771 flow [2024-06-21 16:33:44,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 152 transitions, 1707 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:33:44,435 INFO L231 Difference]: Finished difference. Result has 165 places, 136 transitions, 1414 flow [2024-06-21 16:33:44,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1414, PETRI_PLACES=165, PETRI_TRANSITIONS=136} [2024-06-21 16:33:44,436 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2024-06-21 16:33:44,436 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 136 transitions, 1414 flow [2024-06-21 16:33:44,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:44,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:44,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:44,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:33:44,437 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)] === [2024-06-21 16:33:44,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1756864769, now seen corresponding path program 9 times [2024-06-21 16:33:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:44,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129640189] [2024-06-21 16:33:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:44,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:44,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:44,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129640189] [2024-06-21 16:33:44,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129640189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:44,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:44,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:44,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153254785] [2024-06-21 16:33:44,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:44,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:44,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:45,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:45,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 136 transitions, 1414 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:45,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:45,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:45,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:45,391 INFO L124 PetriNetUnfolderBase]: 390/742 cut-off events. [2024-06-21 16:33:45,391 INFO L125 PetriNetUnfolderBase]: For 33284/33284 co-relation queries the response was YES. [2024-06-21 16:33:45,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4023 conditions, 742 events. 390/742 cut-off events. For 33284/33284 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3588 event pairs, 71 based on Foata normal form. 14/755 useless extension candidates. Maximal degree in co-relation 3941. Up to 635 conditions per place. [2024-06-21 16:33:45,395 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 125 selfloop transitions, 15 changer transitions 14/156 dead transitions. [2024-06-21 16:33:45,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 156 transitions, 1794 flow [2024-06-21 16:33:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:33:45,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 16:33:45,400 INFO L175 Difference]: Start difference. First operand has 165 places, 136 transitions, 1414 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:33:45,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 156 transitions, 1794 flow [2024-06-21 16:33:45,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 156 transitions, 1710 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 16:33:45,462 INFO L231 Difference]: Finished difference. Result has 166 places, 130 transitions, 1301 flow [2024-06-21 16:33:45,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1301, PETRI_PLACES=166, PETRI_TRANSITIONS=130} [2024-06-21 16:33:45,463 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 137 predicate places. [2024-06-21 16:33:45,463 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 130 transitions, 1301 flow [2024-06-21 16:33:45,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:45,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:45,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:33:45,464 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)] === [2024-06-21 16:33:45,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1757080250, now seen corresponding path program 4 times [2024-06-21 16:33:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:45,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496963199] [2024-06-21 16:33:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:45,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:46,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:46,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496963199] [2024-06-21 16:33:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496963199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:46,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:46,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306241890] [2024-06-21 16:33:46,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:46,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:46,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:46,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 130 transitions, 1301 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:46,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:46,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:46,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:46,524 INFO L124 PetriNetUnfolderBase]: 347/661 cut-off events. [2024-06-21 16:33:46,525 INFO L125 PetriNetUnfolderBase]: For 18997/18997 co-relation queries the response was YES. [2024-06-21 16:33:46,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 661 events. 347/661 cut-off events. For 18997/18997 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3112 event pairs, 66 based on Foata normal form. 2/662 useless extension candidates. Maximal degree in co-relation 3463. Up to 630 conditions per place. [2024-06-21 16:33:46,529 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 126 selfloop transitions, 13 changer transitions 0/141 dead transitions. [2024-06-21 16:33:46,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 141 transitions, 1607 flow [2024-06-21 16:33:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 16:33:46,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-21 16:33:46,530 INFO L175 Difference]: Start difference. First operand has 166 places, 130 transitions, 1301 flow. Second operand 9 states and 95 transitions. [2024-06-21 16:33:46,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 141 transitions, 1607 flow [2024-06-21 16:33:46,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 141 transitions, 1456 flow, removed 4 selfloop flow, removed 16 redundant places. [2024-06-21 16:33:46,577 INFO L231 Difference]: Finished difference. Result has 160 places, 131 transitions, 1191 flow [2024-06-21 16:33:46,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1191, PETRI_PLACES=160, PETRI_TRANSITIONS=131} [2024-06-21 16:33:46,578 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2024-06-21 16:33:46,578 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 131 transitions, 1191 flow [2024-06-21 16:33:46,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:46,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:46,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:46,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:33:46,579 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)] === [2024-06-21 16:33:46,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1093632444, now seen corresponding path program 9 times [2024-06-21 16:33:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:46,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961484290] [2024-06-21 16:33:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:46,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:47,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:47,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961484290] [2024-06-21 16:33:47,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961484290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:47,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:47,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:47,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215125991] [2024-06-21 16:33:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:47,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:47,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:47,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:47,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 131 transitions, 1191 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:47,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:47,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:47,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:47,715 INFO L124 PetriNetUnfolderBase]: 343/655 cut-off events. [2024-06-21 16:33:47,716 INFO L125 PetriNetUnfolderBase]: For 17143/17143 co-relation queries the response was YES. [2024-06-21 16:33:47,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3254 conditions, 655 events. 343/655 cut-off events. For 17143/17143 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3087 event pairs, 49 based on Foata normal form. 2/656 useless extension candidates. Maximal degree in co-relation 3174. Up to 498 conditions per place. [2024-06-21 16:33:47,720 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 114 selfloop transitions, 38 changer transitions 0/154 dead transitions. [2024-06-21 16:33:47,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 154 transitions, 1584 flow [2024-06-21 16:33:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 16:33:47,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:33:47,723 INFO L175 Difference]: Start difference. First operand has 160 places, 131 transitions, 1191 flow. Second operand 10 states and 125 transitions. [2024-06-21 16:33:47,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 154 transitions, 1584 flow [2024-06-21 16:33:47,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 154 transitions, 1512 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:47,761 INFO L231 Difference]: Finished difference. Result has 163 places, 133 transitions, 1234 flow [2024-06-21 16:33:47,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1234, PETRI_PLACES=163, PETRI_TRANSITIONS=133} [2024-06-21 16:33:47,761 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2024-06-21 16:33:47,761 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 133 transitions, 1234 flow [2024-06-21 16:33:47,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:47,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:47,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:47,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:33:47,762 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)] === [2024-06-21 16:33:47,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:47,762 INFO L85 PathProgramCache]: Analyzing trace with hash 824058064, now seen corresponding path program 1 times [2024-06-21 16:33:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272897446] [2024-06-21 16:33:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:47,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:48,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272897446] [2024-06-21 16:33:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272897446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:48,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:48,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:48,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760143502] [2024-06-21 16:33:48,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:48,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:48,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 133 transitions, 1234 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:48,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:48,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:48,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:48,955 INFO L124 PetriNetUnfolderBase]: 391/755 cut-off events. [2024-06-21 16:33:48,955 INFO L125 PetriNetUnfolderBase]: For 39161/39161 co-relation queries the response was YES. [2024-06-21 16:33:48,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 755 events. 391/755 cut-off events. For 39161/39161 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3698 event pairs, 76 based on Foata normal form. 8/762 useless extension candidates. Maximal degree in co-relation 4069. Up to 316 conditions per place. [2024-06-21 16:33:48,959 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 89 selfloop transitions, 56 changer transitions 15/162 dead transitions. [2024-06-21 16:33:48,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 162 transitions, 1750 flow [2024-06-21 16:33:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 16:33:48,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 16:33:48,960 INFO L175 Difference]: Start difference. First operand has 163 places, 133 transitions, 1234 flow. Second operand 10 states and 129 transitions. [2024-06-21 16:33:48,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 162 transitions, 1750 flow [2024-06-21 16:33:49,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 162 transitions, 1503 flow, removed 34 selfloop flow, removed 14 redundant places. [2024-06-21 16:33:49,021 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1085 flow [2024-06-21 16:33:49,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1085, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-06-21 16:33:49,022 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2024-06-21 16:33:49,022 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1085 flow [2024-06-21 16:33:49,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:49,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:49,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:49,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:33:49,022 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)] === [2024-06-21 16:33:49,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 882150514, now seen corresponding path program 2 times [2024-06-21 16:33:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:49,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002173821] [2024-06-21 16:33:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:49,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:49,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002173821] [2024-06-21 16:33:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002173821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:49,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:49,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434707649] [2024-06-21 16:33:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:49,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:49,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:49,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1085 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:49,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:49,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:49,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:50,283 INFO L124 PetriNetUnfolderBase]: 408/794 cut-off events. [2024-06-21 16:33:50,283 INFO L125 PetriNetUnfolderBase]: For 52918/52918 co-relation queries the response was YES. [2024-06-21 16:33:50,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4532 conditions, 794 events. 408/794 cut-off events. For 52918/52918 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3972 event pairs, 77 based on Foata normal form. 8/801 useless extension candidates. Maximal degree in co-relation 4460. Up to 345 conditions per place. [2024-06-21 16:33:50,287 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 80 selfloop transitions, 63 changer transitions 16/161 dead transitions. [2024-06-21 16:33:50,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 161 transitions, 1605 flow [2024-06-21 16:33:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 16:33:50,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2024-06-21 16:33:50,290 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1085 flow. Second operand 11 states and 146 transitions. [2024-06-21 16:33:50,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 161 transitions, 1605 flow [2024-06-21 16:33:50,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 161 transitions, 1517 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:50,367 INFO L231 Difference]: Finished difference. Result has 157 places, 125 transitions, 1094 flow [2024-06-21 16:33:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1094, PETRI_PLACES=157, PETRI_TRANSITIONS=125} [2024-06-21 16:33:50,367 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2024-06-21 16:33:50,367 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 125 transitions, 1094 flow [2024-06-21 16:33:50,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:50,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:50,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:50,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:33:50,368 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)] === [2024-06-21 16:33:50,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1289359484, now seen corresponding path program 3 times [2024-06-21 16:33:50,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:50,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331255874] [2024-06-21 16:33:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331255874] [2024-06-21 16:33:51,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331255874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:51,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:51,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:51,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578693385] [2024-06-21 16:33:51,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:51,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:51,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 125 transitions, 1094 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:51,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:51,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:51,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:51,479 INFO L124 PetriNetUnfolderBase]: 398/780 cut-off events. [2024-06-21 16:33:51,479 INFO L125 PetriNetUnfolderBase]: For 51124/51124 co-relation queries the response was YES. [2024-06-21 16:33:51,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 780 events. 398/780 cut-off events. For 51124/51124 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3872 event pairs, 85 based on Foata normal form. 10/789 useless extension candidates. Maximal degree in co-relation 4455. Up to 456 conditions per place. [2024-06-21 16:33:51,483 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 73 selfloop transitions, 60 changer transitions 14/149 dead transitions. [2024-06-21 16:33:51,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 149 transitions, 1462 flow [2024-06-21 16:33:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:33:51,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-21 16:33:51,485 INFO L175 Difference]: Start difference. First operand has 157 places, 125 transitions, 1094 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:33:51,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 149 transitions, 1462 flow [2024-06-21 16:33:51,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 149 transitions, 1330 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:33:51,538 INFO L231 Difference]: Finished difference. Result has 153 places, 122 transitions, 1066 flow [2024-06-21 16:33:51,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1066, PETRI_PLACES=153, PETRI_TRANSITIONS=122} [2024-06-21 16:33:51,538 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2024-06-21 16:33:51,538 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 122 transitions, 1066 flow [2024-06-21 16:33:51,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:51,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:51,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:51,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:33:51,539 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)] === [2024-06-21 16:33:51,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1289364134, now seen corresponding path program 4 times [2024-06-21 16:33:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:51,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370522701] [2024-06-21 16:33:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:52,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370522701] [2024-06-21 16:33:52,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370522701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:52,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:52,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817193513] [2024-06-21 16:33:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:52,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:52,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 122 transitions, 1066 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:52,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:52,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:52,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:52,623 INFO L124 PetriNetUnfolderBase]: 361/709 cut-off events. [2024-06-21 16:33:52,623 INFO L125 PetriNetUnfolderBase]: For 34407/34407 co-relation queries the response was YES. [2024-06-21 16:33:52,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 709 events. 361/709 cut-off events. For 34407/34407 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3477 event pairs, 58 based on Foata normal form. 8/716 useless extension candidates. Maximal degree in co-relation 3703. Up to 395 conditions per place. [2024-06-21 16:33:52,627 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 68 selfloop transitions, 55 changer transitions 20/145 dead transitions. [2024-06-21 16:33:52,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 145 transitions, 1420 flow [2024-06-21 16:33:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:33:52,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-21 16:33:52,628 INFO L175 Difference]: Start difference. First operand has 153 places, 122 transitions, 1066 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:33:52,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 145 transitions, 1420 flow [2024-06-21 16:33:52,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 145 transitions, 1296 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:33:52,683 INFO L231 Difference]: Finished difference. Result has 151 places, 117 transitions, 1017 flow [2024-06-21 16:33:52,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1017, PETRI_PLACES=151, PETRI_TRANSITIONS=117} [2024-06-21 16:33:52,684 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-06-21 16:33:52,684 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 117 transitions, 1017 flow [2024-06-21 16:33:52,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:52,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:52,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:52,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:33:52,689 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)] === [2024-06-21 16:33:52,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash -720782052, now seen corresponding path program 5 times [2024-06-21 16:33:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:52,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247526035] [2024-06-21 16:33:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:52,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:53,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247526035] [2024-06-21 16:33:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247526035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517911097] [2024-06-21 16:33:53,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:53,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:53,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 117 transitions, 1017 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:53,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:53,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:53,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:53,917 INFO L124 PetriNetUnfolderBase]: 351/689 cut-off events. [2024-06-21 16:33:53,918 INFO L125 PetriNetUnfolderBase]: For 35062/35062 co-relation queries the response was YES. [2024-06-21 16:33:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3665 conditions, 689 events. 351/689 cut-off events. For 35062/35062 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3364 event pairs, 66 based on Foata normal form. 10/698 useless extension candidates. Maximal degree in co-relation 3597. Up to 471 conditions per place. [2024-06-21 16:33:53,921 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 86 selfloop transitions, 36 changer transitions 13/137 dead transitions. [2024-06-21 16:33:53,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 137 transitions, 1351 flow [2024-06-21 16:33:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 16:33:53,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-21 16:33:53,922 INFO L175 Difference]: Start difference. First operand has 151 places, 117 transitions, 1017 flow. Second operand 11 states and 128 transitions. [2024-06-21 16:33:53,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 137 transitions, 1351 flow [2024-06-21 16:33:53,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 137 transitions, 1201 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:33:53,966 INFO L231 Difference]: Finished difference. Result has 146 places, 112 transitions, 912 flow [2024-06-21 16:33:53,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=912, PETRI_PLACES=146, PETRI_TRANSITIONS=112} [2024-06-21 16:33:53,967 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-06-21 16:33:53,967 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 112 transitions, 912 flow [2024-06-21 16:33:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:53,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:53,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:53,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:33:53,967 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)] === [2024-06-21 16:33:53,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -720786702, now seen corresponding path program 6 times [2024-06-21 16:33:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871881997] [2024-06-21 16:33:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:54,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:54,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871881997] [2024-06-21 16:33:54,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871881997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:54,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:54,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:54,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397911265] [2024-06-21 16:33:54,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:54,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:54,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:54,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:54,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:54,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 112 transitions, 912 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:54,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:54,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:55,173 INFO L124 PetriNetUnfolderBase]: 323/641 cut-off events. [2024-06-21 16:33:55,174 INFO L125 PetriNetUnfolderBase]: For 32716/32716 co-relation queries the response was YES. [2024-06-21 16:33:55,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 641 events. 323/641 cut-off events. For 32716/32716 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3102 event pairs, 58 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 3333. Up to 443 conditions per place. [2024-06-21 16:33:55,177 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 85 selfloop transitions, 31 changer transitions 13/131 dead transitions. [2024-06-21 16:33:55,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 131 transitions, 1224 flow [2024-06-21 16:33:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 16:33:55,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-21 16:33:55,178 INFO L175 Difference]: Start difference. First operand has 146 places, 112 transitions, 912 flow. Second operand 10 states and 118 transitions. [2024-06-21 16:33:55,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 131 transitions, 1224 flow [2024-06-21 16:33:55,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 131 transitions, 1124 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:33:55,233 INFO L231 Difference]: Finished difference. Result has 144 places, 108 transitions, 844 flow [2024-06-21 16:33:55,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=844, PETRI_PLACES=144, PETRI_TRANSITIONS=108} [2024-06-21 16:33:55,233 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2024-06-21 16:33:55,233 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 108 transitions, 844 flow [2024-06-21 16:33:55,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:55,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:55,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:55,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:33:55,234 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)] === [2024-06-21 16:33:55,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash -725250702, now seen corresponding path program 7 times [2024-06-21 16:33:55,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:55,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182825036] [2024-06-21 16:33:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:55,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:55,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182825036] [2024-06-21 16:33:55,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182825036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:55,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:55,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:55,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524100349] [2024-06-21 16:33:55,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:55,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:55,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:55,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:55,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:56,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:56,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 108 transitions, 844 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:56,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:56,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:56,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:56,299 INFO L124 PetriNetUnfolderBase]: 317/631 cut-off events. [2024-06-21 16:33:56,299 INFO L125 PetriNetUnfolderBase]: For 34613/34613 co-relation queries the response was YES. [2024-06-21 16:33:56,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 631 events. 317/631 cut-off events. For 34613/34613 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3024 event pairs, 54 based on Foata normal form. 10/640 useless extension candidates. Maximal degree in co-relation 3260. Up to 401 conditions per place. [2024-06-21 16:33:56,302 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 73 selfloop transitions, 37 changer transitions 15/127 dead transitions. [2024-06-21 16:33:56,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 127 transitions, 1152 flow [2024-06-21 16:33:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:33:56,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:33:56,304 INFO L175 Difference]: Start difference. First operand has 144 places, 108 transitions, 844 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:33:56,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 127 transitions, 1152 flow [2024-06-21 16:33:56,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 127 transitions, 1079 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:33:56,347 INFO L231 Difference]: Finished difference. Result has 141 places, 102 transitions, 811 flow [2024-06-21 16:33:56,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=811, PETRI_PLACES=141, PETRI_TRANSITIONS=102} [2024-06-21 16:33:56,347 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2024-06-21 16:33:56,348 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 102 transitions, 811 flow [2024-06-21 16:33:56,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:56,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:56,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:56,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:33:56,348 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)] === [2024-06-21 16:33:56,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash -725255352, now seen corresponding path program 8 times [2024-06-21 16:33:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431817294] [2024-06-21 16:33:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:56,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:56,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431817294] [2024-06-21 16:33:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431817294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:56,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:56,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:56,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350987637] [2024-06-21 16:33:56,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:56,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:56,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:57,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:57,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 102 transitions, 811 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:57,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:57,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:57,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:57,290 INFO L124 PetriNetUnfolderBase]: 297/599 cut-off events. [2024-06-21 16:33:57,290 INFO L125 PetriNetUnfolderBase]: For 32659/32659 co-relation queries the response was YES. [2024-06-21 16:33:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3198 conditions, 599 events. 297/599 cut-off events. For 32659/32659 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2861 event pairs, 58 based on Foata normal form. 8/606 useless extension candidates. Maximal degree in co-relation 3136. Up to 395 conditions per place. [2024-06-21 16:33:57,293 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 73 selfloop transitions, 27 changer transitions 19/121 dead transitions. [2024-06-21 16:33:57,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 121 transitions, 1101 flow [2024-06-21 16:33:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 16:33:57,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-21 16:33:57,294 INFO L175 Difference]: Start difference. First operand has 141 places, 102 transitions, 811 flow. Second operand 11 states and 125 transitions. [2024-06-21 16:33:57,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 121 transitions, 1101 flow [2024-06-21 16:33:57,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 121 transitions, 1021 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:33:57,338 INFO L231 Difference]: Finished difference. Result has 138 places, 92 transitions, 716 flow [2024-06-21 16:33:57,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=716, PETRI_PLACES=138, PETRI_TRANSITIONS=92} [2024-06-21 16:33:57,339 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 109 predicate places. [2024-06-21 16:33:57,339 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 92 transitions, 716 flow [2024-06-21 16:33:57,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:57,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:57,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:57,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:33:57,339 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)] === [2024-06-21 16:33:57,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1599705998, now seen corresponding path program 9 times [2024-06-21 16:33:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:57,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822803592] [2024-06-21 16:33:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:57,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:58,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:58,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822803592] [2024-06-21 16:33:58,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822803592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:58,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:58,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:58,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862331224] [2024-06-21 16:33:58,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:58,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:58,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:58,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:58,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:58,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 92 transitions, 716 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:58,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:58,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:58,381 INFO L124 PetriNetUnfolderBase]: 273/543 cut-off events. [2024-06-21 16:33:58,381 INFO L125 PetriNetUnfolderBase]: For 34914/34914 co-relation queries the response was YES. [2024-06-21 16:33:58,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3138 conditions, 543 events. 273/543 cut-off events. For 34914/34914 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2477 event pairs, 71 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 3078. Up to 217 conditions per place. [2024-06-21 16:33:58,384 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 63 selfloop transitions, 39 changer transitions 10/114 dead transitions. [2024-06-21 16:33:58,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 114 transitions, 1098 flow [2024-06-21 16:33:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 16:33:58,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-21 16:33:58,385 INFO L175 Difference]: Start difference. First operand has 138 places, 92 transitions, 716 flow. Second operand 10 states and 118 transitions. [2024-06-21 16:33:58,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 114 transitions, 1098 flow [2024-06-21 16:33:58,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 114 transitions, 969 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-06-21 16:33:58,413 INFO L231 Difference]: Finished difference. Result has 126 places, 89 transitions, 662 flow [2024-06-21 16:33:58,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=662, PETRI_PLACES=126, PETRI_TRANSITIONS=89} [2024-06-21 16:33:58,413 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2024-06-21 16:33:58,413 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 89 transitions, 662 flow [2024-06-21 16:33:58,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:58,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:58,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:58,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:33:58,414 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)] === [2024-06-21 16:33:58,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash 528215300, now seen corresponding path program 10 times [2024-06-21 16:33:58,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:58,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035465531] [2024-06-21 16:33:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:59,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:59,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035465531] [2024-06-21 16:33:59,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035465531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:59,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:59,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:33:59,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884029789] [2024-06-21 16:33:59,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:59,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:33:59,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:59,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:33:59,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:33:59,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:33:59,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 89 transitions, 662 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:59,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:59,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:33:59,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:59,401 INFO L124 PetriNetUnfolderBase]: 298/594 cut-off events. [2024-06-21 16:33:59,402 INFO L125 PetriNetUnfolderBase]: For 38273/38273 co-relation queries the response was YES. [2024-06-21 16:33:59,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3558 conditions, 594 events. 298/594 cut-off events. For 38273/38273 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2817 event pairs, 84 based on Foata normal form. 8/601 useless extension candidates. Maximal degree in co-relation 3501. Up to 383 conditions per place. [2024-06-21 16:33:59,404 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 74 selfloop transitions, 29 changer transitions 7/112 dead transitions. [2024-06-21 16:33:59,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 112 transitions, 1046 flow [2024-06-21 16:33:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 16:33:59,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 16:33:59,405 INFO L175 Difference]: Start difference. First operand has 126 places, 89 transitions, 662 flow. Second operand 10 states and 117 transitions. [2024-06-21 16:33:59,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 112 transitions, 1046 flow [2024-06-21 16:33:59,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 112 transitions, 967 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 16:33:59,462 INFO L231 Difference]: Finished difference. Result has 124 places, 89 transitions, 661 flow [2024-06-21 16:33:59,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=661, PETRI_PLACES=124, PETRI_TRANSITIONS=89} [2024-06-21 16:33:59,462 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-21 16:33:59,463 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 89 transitions, 661 flow [2024-06-21 16:33:59,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:59,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:59,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:59,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:33:59,463 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)] === [2024-06-21 16:33:59,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 528219950, now seen corresponding path program 11 times [2024-06-21 16:33:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:59,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816137010] [2024-06-21 16:33:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:00,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816137010] [2024-06-21 16:34:00,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816137010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:00,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:00,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:34:00,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428068681] [2024-06-21 16:34:00,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:00,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:34:00,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:34:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:34:00,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:00,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 89 transitions, 661 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:00,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:00,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:00,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:00,671 INFO L124 PetriNetUnfolderBase]: 267/533 cut-off events. [2024-06-21 16:34:00,671 INFO L125 PetriNetUnfolderBase]: For 28859/28859 co-relation queries the response was YES. [2024-06-21 16:34:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 533 events. 267/533 cut-off events. For 28859/28859 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2425 event pairs, 75 based on Foata normal form. 10/542 useless extension candidates. Maximal degree in co-relation 2893. Up to 383 conditions per place. [2024-06-21 16:34:00,674 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 63 selfloop transitions, 24 changer transitions 16/105 dead transitions. [2024-06-21 16:34:00,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 105 transitions, 915 flow [2024-06-21 16:34:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:34:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:34:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 16:34:00,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-06-21 16:34:00,675 INFO L175 Difference]: Start difference. First operand has 124 places, 89 transitions, 661 flow. Second operand 10 states and 111 transitions. [2024-06-21 16:34:00,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 105 transitions, 915 flow [2024-06-21 16:34:00,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 105 transitions, 859 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:00,700 INFO L231 Difference]: Finished difference. Result has 124 places, 83 transitions, 605 flow [2024-06-21 16:34:00,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=605, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2024-06-21 16:34:00,702 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-21 16:34:00,702 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 605 flow [2024-06-21 16:34:00,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:00,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:00,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:00,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:34:00,702 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)] === [2024-06-21 16:34:00,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1599590678, now seen corresponding path program 12 times [2024-06-21 16:34:00,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:00,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983488449] [2024-06-21 16:34:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:00,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:01,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:01,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983488449] [2024-06-21 16:34:01,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983488449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:01,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:01,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:34:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288147109] [2024-06-21 16:34:01,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:34:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:34:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:34:01,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:01,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 605 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:01,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:01,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:01,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:02,036 INFO L124 PetriNetUnfolderBase]: 279/561 cut-off events. [2024-06-21 16:34:02,036 INFO L125 PetriNetUnfolderBase]: For 32669/32669 co-relation queries the response was YES. [2024-06-21 16:34:02,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3314 conditions, 561 events. 279/561 cut-off events. For 32669/32669 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2619 event pairs, 84 based on Foata normal form. 8/568 useless extension candidates. Maximal degree in co-relation 3259. Up to 324 conditions per place. [2024-06-21 16:34:02,039 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 60 selfloop transitions, 36 changer transitions 7/105 dead transitions. [2024-06-21 16:34:02,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 105 transitions, 955 flow [2024-06-21 16:34:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:34:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:34:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 16:34:02,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-21 16:34:02,042 INFO L175 Difference]: Start difference. First operand has 124 places, 83 transitions, 605 flow. Second operand 10 states and 119 transitions. [2024-06-21 16:34:02,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 105 transitions, 955 flow [2024-06-21 16:34:02,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 105 transitions, 895 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:02,064 INFO L231 Difference]: Finished difference. Result has 118 places, 81 transitions, 611 flow [2024-06-21 16:34:02,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=611, PETRI_PLACES=118, PETRI_TRANSITIONS=81} [2024-06-21 16:34:02,065 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2024-06-21 16:34:02,065 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 81 transitions, 611 flow [2024-06-21 16:34:02,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:02,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:02,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:02,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:34:02,066 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)] === [2024-06-21 16:34:02,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1422208554, now seen corresponding path program 1 times [2024-06-21 16:34:02,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:02,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563177418] [2024-06-21 16:34:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:02,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:02,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:02,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563177418] [2024-06-21 16:34:02,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563177418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:02,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:02,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:02,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128453739] [2024-06-21 16:34:02,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:02,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:02,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:03,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:03,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 81 transitions, 611 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:03,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:03,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:03,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:03,415 INFO L124 PetriNetUnfolderBase]: 273/551 cut-off events. [2024-06-21 16:34:03,416 INFO L125 PetriNetUnfolderBase]: For 30933/30933 co-relation queries the response was YES. [2024-06-21 16:34:03,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3264 conditions, 551 events. 273/551 cut-off events. For 30933/30933 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2585 event pairs, 87 based on Foata normal form. 8/558 useless extension candidates. Maximal degree in co-relation 3211. Up to 420 conditions per place. [2024-06-21 16:34:03,418 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 61 selfloop transitions, 22 changer transitions 13/98 dead transitions. [2024-06-21 16:34:03,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 98 transitions, 849 flow [2024-06-21 16:34:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:34:03,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:34:03,424 INFO L175 Difference]: Start difference. First operand has 118 places, 81 transitions, 611 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:34:03,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 98 transitions, 849 flow [2024-06-21 16:34:03,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 98 transitions, 775 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:34:03,443 INFO L231 Difference]: Finished difference. Result has 118 places, 77 transitions, 556 flow [2024-06-21 16:34:03,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=556, PETRI_PLACES=118, PETRI_TRANSITIONS=77} [2024-06-21 16:34:03,444 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2024-06-21 16:34:03,444 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 77 transitions, 556 flow [2024-06-21 16:34:03,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:03,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:03,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:03,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:34:03,444 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)] === [2024-06-21 16:34:03,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1599586028, now seen corresponding path program 13 times [2024-06-21 16:34:03,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:03,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220959848] [2024-06-21 16:34:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:04,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:04,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220959848] [2024-06-21 16:34:04,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220959848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:04,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:04,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:34:04,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440130367] [2024-06-21 16:34:04,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:04,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:34:04,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:34:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:34:04,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:04,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 77 transitions, 556 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:04,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:04,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:04,534 INFO L124 PetriNetUnfolderBase]: 236/476 cut-off events. [2024-06-21 16:34:04,534 INFO L125 PetriNetUnfolderBase]: For 24412/24412 co-relation queries the response was YES. [2024-06-21 16:34:04,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2633 conditions, 476 events. 236/476 cut-off events. For 24412/24412 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2099 event pairs, 73 based on Foata normal form. 10/485 useless extension candidates. Maximal degree in co-relation 2581. Up to 312 conditions per place. [2024-06-21 16:34:04,537 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 48 selfloop transitions, 26 changer transitions 18/94 dead transitions. [2024-06-21 16:34:04,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 94 transitions, 790 flow [2024-06-21 16:34:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:34:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:34:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:34:04,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-21 16:34:04,543 INFO L175 Difference]: Start difference. First operand has 118 places, 77 transitions, 556 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:34:04,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 94 transitions, 790 flow [2024-06-21 16:34:04,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 94 transitions, 740 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 16:34:04,561 INFO L231 Difference]: Finished difference. Result has 114 places, 68 transitions, 499 flow [2024-06-21 16:34:04,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=499, PETRI_PLACES=114, PETRI_TRANSITIONS=68} [2024-06-21 16:34:04,562 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2024-06-21 16:34:04,562 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 68 transitions, 499 flow [2024-06-21 16:34:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:04,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:04,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:04,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:34:04,562 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)] === [2024-06-21 16:34:04,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1428888248, now seen corresponding path program 14 times [2024-06-21 16:34:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:04,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793688540] [2024-06-21 16:34:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:04,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:05,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793688540] [2024-06-21 16:34:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793688540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:05,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:05,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919838021] [2024-06-21 16:34:05,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:05,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:05,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:05,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:05,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 68 transitions, 499 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:05,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:05,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:05,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:05,828 INFO L124 PetriNetUnfolderBase]: 245/499 cut-off events. [2024-06-21 16:34:05,828 INFO L125 PetriNetUnfolderBase]: For 27675/27675 co-relation queries the response was YES. [2024-06-21 16:34:05,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2958 conditions, 499 events. 245/499 cut-off events. For 27675/27675 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2260 event pairs, 68 based on Foata normal form. 8/506 useless extension candidates. Maximal degree in co-relation 2907. Up to 292 conditions per place. [2024-06-21 16:34:05,835 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 58 selfloop transitions, 25 changer transitions 7/92 dead transitions. [2024-06-21 16:34:05,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 92 transitions, 821 flow [2024-06-21 16:34:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:34:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:34:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 16:34:05,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-21 16:34:05,836 INFO L175 Difference]: Start difference. First operand has 114 places, 68 transitions, 499 flow. Second operand 12 states and 134 transitions. [2024-06-21 16:34:05,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 92 transitions, 821 flow [2024-06-21 16:34:05,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 92 transitions, 753 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 16:34:05,866 INFO L231 Difference]: Finished difference. Result has 108 places, 66 transitions, 479 flow [2024-06-21 16:34:05,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=479, PETRI_PLACES=108, PETRI_TRANSITIONS=66} [2024-06-21 16:34:05,868 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 79 predicate places. [2024-06-21 16:34:05,868 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 66 transitions, 479 flow [2024-06-21 16:34:05,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:05,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:05,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:05,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:34:05,869 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)] === [2024-06-21 16:34:05,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 259539276, now seen corresponding path program 15 times [2024-06-21 16:34:05,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:05,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385461472] [2024-06-21 16:34:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:05,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385461472] [2024-06-21 16:34:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385461472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:06,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:06,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:06,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916965237] [2024-06-21 16:34:06,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:06,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:06,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:06,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:06,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:06,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:06,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 66 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:06,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:06,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:06,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:07,139 INFO L124 PetriNetUnfolderBase]: 214/438 cut-off events. [2024-06-21 16:34:07,139 INFO L125 PetriNetUnfolderBase]: For 19269/19269 co-relation queries the response was YES. [2024-06-21 16:34:07,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 438 events. 214/438 cut-off events. For 19269/19269 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1890 event pairs, 71 based on Foata normal form. 10/447 useless extension candidates. Maximal degree in co-relation 2307. Up to 314 conditions per place. [2024-06-21 16:34:07,142 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 45 selfloop transitions, 9 changer transitions 27/83 dead transitions. [2024-06-21 16:34:07,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 83 transitions, 691 flow [2024-06-21 16:34:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 16:34:07,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2024-06-21 16:34:07,152 INFO L175 Difference]: Start difference. First operand has 108 places, 66 transitions, 479 flow. Second operand 11 states and 118 transitions. [2024-06-21 16:34:07,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 83 transitions, 691 flow [2024-06-21 16:34:07,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 83 transitions, 639 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 16:34:07,173 INFO L231 Difference]: Finished difference. Result has 106 places, 53 transitions, 358 flow [2024-06-21 16:34:07,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=358, PETRI_PLACES=106, PETRI_TRANSITIONS=53} [2024-06-21 16:34:07,174 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2024-06-21 16:34:07,174 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 53 transitions, 358 flow [2024-06-21 16:34:07,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:07,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:07,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:07,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:34:07,175 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)] === [2024-06-21 16:34:07,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 382395010, now seen corresponding path program 2 times [2024-06-21 16:34:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659130193] [2024-06-21 16:34:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:08,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:08,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659130193] [2024-06-21 16:34:08,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659130193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:08,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:08,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:08,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084465522] [2024-06-21 16:34:08,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:08,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:08,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:08,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 53 transitions, 358 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:08,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:08,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:08,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:08,377 INFO L124 PetriNetUnfolderBase]: 182/363 cut-off events. [2024-06-21 16:34:08,377 INFO L125 PetriNetUnfolderBase]: For 14408/14408 co-relation queries the response was YES. [2024-06-21 16:34:08,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2032 conditions, 363 events. 182/363 cut-off events. For 14408/14408 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1494 event pairs, 65 based on Foata normal form. 2/365 useless extension candidates. Maximal degree in co-relation 1985. Up to 323 conditions per place. [2024-06-21 16:34:08,379 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2024-06-21 16:34:08,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 64 transitions, 508 flow [2024-06-21 16:34:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:34:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:34:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-21 16:34:08,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 16:34:08,395 INFO L175 Difference]: Start difference. First operand has 106 places, 53 transitions, 358 flow. Second operand 10 states and 100 transitions. [2024-06-21 16:34:08,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 64 transitions, 508 flow [2024-06-21 16:34:08,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 64 transitions, 451 flow, removed 7 selfloop flow, removed 16 redundant places. [2024-06-21 16:34:08,404 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 337 flow [2024-06-21 16:34:08,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=337, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2024-06-21 16:34:08,404 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2024-06-21 16:34:08,404 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 337 flow [2024-06-21 16:34:08,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:08,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:08,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:08,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:34:08,405 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)] === [2024-06-21 16:34:08,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash -665614976, now seen corresponding path program 3 times [2024-06-21 16:34:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:08,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706589960] [2024-06-21 16:34:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:09,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:09,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706589960] [2024-06-21 16:34:09,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706589960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:09,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:09,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:09,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756883111] [2024-06-21 16:34:09,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:09,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:09,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:09,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:09,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 337 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:09,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:09,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:09,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:09,550 INFO L124 PetriNetUnfolderBase]: 179/358 cut-off events. [2024-06-21 16:34:09,550 INFO L125 PetriNetUnfolderBase]: For 8590/8590 co-relation queries the response was YES. [2024-06-21 16:34:09,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 358 events. 179/358 cut-off events. For 8590/8590 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1460 event pairs, 62 based on Foata normal form. 2/360 useless extension candidates. Maximal degree in co-relation 1754. Up to 306 conditions per place. [2024-06-21 16:34:09,552 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2024-06-21 16:34:09,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 67 transitions, 499 flow [2024-06-21 16:34:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-21 16:34:09,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 16:34:09,553 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 337 flow. Second operand 11 states and 110 transitions. [2024-06-21 16:34:09,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 67 transitions, 499 flow [2024-06-21 16:34:09,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 67 transitions, 473 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:09,560 INFO L231 Difference]: Finished difference. Result has 87 places, 55 transitions, 355 flow [2024-06-21 16:34:09,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=355, PETRI_PLACES=87, PETRI_TRANSITIONS=55} [2024-06-21 16:34:09,561 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-06-21 16:34:09,561 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 55 transitions, 355 flow [2024-06-21 16:34:09,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:09,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:09,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:09,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:34:09,561 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)] === [2024-06-21 16:34:09,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1049269204, now seen corresponding path program 4 times [2024-06-21 16:34:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:09,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790584415] [2024-06-21 16:34:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:09,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:10,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:10,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790584415] [2024-06-21 16:34:10,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790584415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:10,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:10,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382437466] [2024-06-21 16:34:10,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:10,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:10,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:10,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 55 transitions, 355 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:10,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:10,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:10,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:10,696 INFO L124 PetriNetUnfolderBase]: 183/366 cut-off events. [2024-06-21 16:34:10,696 INFO L125 PetriNetUnfolderBase]: For 9334/9334 co-relation queries the response was YES. [2024-06-21 16:34:10,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 366 events. 183/366 cut-off events. For 9334/9334 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1512 event pairs, 54 based on Foata normal form. 2/368 useless extension candidates. Maximal degree in co-relation 1826. Up to 324 conditions per place. [2024-06-21 16:34:10,698 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 51 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-06-21 16:34:10,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 67 transitions, 517 flow [2024-06-21 16:34:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:34:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:34:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-21 16:34:10,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-06-21 16:34:10,699 INFO L175 Difference]: Start difference. First operand has 87 places, 55 transitions, 355 flow. Second operand 10 states and 102 transitions. [2024-06-21 16:34:10,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 67 transitions, 517 flow [2024-06-21 16:34:10,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 483 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 16:34:10,708 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 365 flow [2024-06-21 16:34:10,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=365, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2024-06-21 16:34:10,708 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-21 16:34:10,708 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 365 flow [2024-06-21 16:34:10,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:10,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:10,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:10,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:34:10,709 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)] === [2024-06-21 16:34:10,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash -672294670, now seen corresponding path program 16 times [2024-06-21 16:34:10,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:10,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920554810] [2024-06-21 16:34:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:10,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:11,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920554810] [2024-06-21 16:34:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920554810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:11,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608438102] [2024-06-21 16:34:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:11,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:11,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:11,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:11,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 365 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:11,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:11,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:11,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:11,873 INFO L124 PetriNetUnfolderBase]: 224/453 cut-off events. [2024-06-21 16:34:11,873 INFO L125 PetriNetUnfolderBase]: For 15488/15488 co-relation queries the response was YES. [2024-06-21 16:34:11,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2395 conditions, 453 events. 224/453 cut-off events. For 15488/15488 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2047 event pairs, 67 based on Foata normal form. 8/461 useless extension candidates. Maximal degree in co-relation 2354. Up to 289 conditions per place. [2024-06-21 16:34:11,875 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 17 changer transitions 7/78 dead transitions. [2024-06-21 16:34:11,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 78 transitions, 637 flow [2024-06-21 16:34:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:34:11,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-06-21 16:34:11,876 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 365 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:34:11,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 78 transitions, 637 flow [2024-06-21 16:34:11,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 78 transitions, 603 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:11,888 INFO L231 Difference]: Finished difference. Result has 91 places, 54 transitions, 355 flow [2024-06-21 16:34:11,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=355, PETRI_PLACES=91, PETRI_TRANSITIONS=54} [2024-06-21 16:34:11,889 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-06-21 16:34:11,889 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 54 transitions, 355 flow [2024-06-21 16:34:11,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:11,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:11,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:11,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:34:11,889 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)] === [2024-06-21 16:34:11,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1049260834, now seen corresponding path program 5 times [2024-06-21 16:34:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:11,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926723918] [2024-06-21 16:34:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:11,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:12,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:12,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926723918] [2024-06-21 16:34:12,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926723918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:12,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:12,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767117363] [2024-06-21 16:34:12,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:12,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:12,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:12,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:12,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 54 transitions, 355 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:12,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:12,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:12,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:13,201 INFO L124 PetriNetUnfolderBase]: 210/423 cut-off events. [2024-06-21 16:34:13,201 INFO L125 PetriNetUnfolderBase]: For 14559/14559 co-relation queries the response was YES. [2024-06-21 16:34:13,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2350 conditions, 423 events. 210/423 cut-off events. For 14559/14559 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1859 event pairs, 73 based on Foata normal form. 2/425 useless extension candidates. Maximal degree in co-relation 2308. Up to 367 conditions per place. [2024-06-21 16:34:13,203 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 49 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-06-21 16:34:13,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 66 transitions, 517 flow [2024-06-21 16:34:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:34:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:34:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 16:34:13,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3433333333333333 [2024-06-21 16:34:13,204 INFO L175 Difference]: Start difference. First operand has 91 places, 54 transitions, 355 flow. Second operand 10 states and 103 transitions. [2024-06-21 16:34:13,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 66 transitions, 517 flow [2024-06-21 16:34:13,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 66 transitions, 481 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:34:13,215 INFO L231 Difference]: Finished difference. Result has 89 places, 55 transitions, 367 flow [2024-06-21 16:34:13,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=367, PETRI_PLACES=89, PETRI_TRANSITIONS=55} [2024-06-21 16:34:13,215 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-21 16:34:13,215 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 55 transitions, 367 flow [2024-06-21 16:34:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:13,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:13,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:13,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:34:13,216 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)] === [2024-06-21 16:34:13,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash -672290020, now seen corresponding path program 17 times [2024-06-21 16:34:13,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:13,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299136239] [2024-06-21 16:34:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:13,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:13,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:13,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299136239] [2024-06-21 16:34:13,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299136239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:13,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:13,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:13,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280757913] [2024-06-21 16:34:13,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:13,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:13,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:14,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:14,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 55 transitions, 367 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:14,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:14,346 INFO L124 PetriNetUnfolderBase]: 197/400 cut-off events. [2024-06-21 16:34:14,346 INFO L125 PetriNetUnfolderBase]: For 12870/12870 co-relation queries the response was YES. [2024-06-21 16:34:14,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 400 events. 197/400 cut-off events. For 12870/12870 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1731 event pairs, 72 based on Foata normal form. 10/410 useless extension candidates. Maximal degree in co-relation 1966. Up to 311 conditions per place. [2024-06-21 16:34:14,348 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 44 selfloop transitions, 10 changer transitions 15/71 dead transitions. [2024-06-21 16:34:14,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 71 transitions, 551 flow [2024-06-21 16:34:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 16:34:14,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-21 16:34:14,349 INFO L175 Difference]: Start difference. First operand has 89 places, 55 transitions, 367 flow. Second operand 11 states and 115 transitions. [2024-06-21 16:34:14,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 71 transitions, 551 flow [2024-06-21 16:34:14,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 71 transitions, 513 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:14,358 INFO L231 Difference]: Finished difference. Result has 92 places, 50 transitions, 318 flow [2024-06-21 16:34:14,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=318, PETRI_PLACES=92, PETRI_TRANSITIONS=50} [2024-06-21 16:34:14,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-21 16:34:14,359 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 50 transitions, 318 flow [2024-06-21 16:34:14,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:14,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:14,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:14,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:34:14,360 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)] === [2024-06-21 16:34:14,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 21084612, now seen corresponding path program 18 times [2024-06-21 16:34:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:14,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074077121] [2024-06-21 16:34:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:14,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:15,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:15,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074077121] [2024-06-21 16:34:15,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074077121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:15,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:15,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371486496] [2024-06-21 16:34:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:15,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:15,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:15,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:15,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:15,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 50 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:15,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:15,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:15,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:15,528 INFO L124 PetriNetUnfolderBase]: 180/369 cut-off events. [2024-06-21 16:34:15,529 INFO L125 PetriNetUnfolderBase]: For 13095/13095 co-relation queries the response was YES. [2024-06-21 16:34:15,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 369 events. 180/369 cut-off events. For 13095/13095 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1565 event pairs, 71 based on Foata normal form. 10/379 useless extension candidates. Maximal degree in co-relation 1786. Up to 292 conditions per place. [2024-06-21 16:34:15,530 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 41 selfloop transitions, 11 changer transitions 11/65 dead transitions. [2024-06-21 16:34:15,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 65 transitions, 488 flow [2024-06-21 16:34:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 16:34:15,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424242424242424 [2024-06-21 16:34:15,531 INFO L175 Difference]: Start difference. First operand has 92 places, 50 transitions, 318 flow. Second operand 11 states and 113 transitions. [2024-06-21 16:34:15,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 65 transitions, 488 flow [2024-06-21 16:34:15,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 65 transitions, 460 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:34:15,538 INFO L231 Difference]: Finished difference. Result has 85 places, 47 transitions, 295 flow [2024-06-21 16:34:15,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=295, PETRI_PLACES=85, PETRI_TRANSITIONS=47} [2024-06-21 16:34:15,539 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-06-21 16:34:15,539 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 47 transitions, 295 flow [2024-06-21 16:34:15,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:15,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:15,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:15,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:34:15,539 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)] === [2024-06-21 16:34:15,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:15,540 INFO L85 PathProgramCache]: Analyzing trace with hash -702621616, now seen corresponding path program 19 times [2024-06-21 16:34:15,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:15,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115977182] [2024-06-21 16:34:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:15,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:16,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:16,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115977182] [2024-06-21 16:34:16,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115977182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:16,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:16,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:16,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554163690] [2024-06-21 16:34:16,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:16,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:16,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:16,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:16,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:16,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 47 transitions, 295 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:16,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:16,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:16,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:16,712 INFO L124 PetriNetUnfolderBase]: 161/336 cut-off events. [2024-06-21 16:34:16,713 INFO L125 PetriNetUnfolderBase]: For 9194/9194 co-relation queries the response was YES. [2024-06-21 16:34:16,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 336 events. 161/336 cut-off events. For 9194/9194 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1377 event pairs, 50 based on Foata normal form. 8/344 useless extension candidates. Maximal degree in co-relation 1542. Up to 174 conditions per place. [2024-06-21 16:34:16,714 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 42 selfloop transitions, 15 changer transitions 9/68 dead transitions. [2024-06-21 16:34:16,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 68 transitions, 531 flow [2024-06-21 16:34:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 16:34:16,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 16:34:16,716 INFO L175 Difference]: Start difference. First operand has 85 places, 47 transitions, 295 flow. Second operand 11 states and 121 transitions. [2024-06-21 16:34:16,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 68 transitions, 531 flow [2024-06-21 16:34:16,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 68 transitions, 501 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:34:16,723 INFO L231 Difference]: Finished difference. Result has 83 places, 43 transitions, 277 flow [2024-06-21 16:34:16,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=277, PETRI_PLACES=83, PETRI_TRANSITIONS=43} [2024-06-21 16:34:16,723 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2024-06-21 16:34:16,723 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 43 transitions, 277 flow [2024-06-21 16:34:16,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:16,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:16,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:34:16,724 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)] === [2024-06-21 16:34:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1039141504, now seen corresponding path program 6 times [2024-06-21 16:34:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144697397] [2024-06-21 16:34:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:17,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144697397] [2024-06-21 16:34:17,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144697397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:17,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:17,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:17,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662141982] [2024-06-21 16:34:17,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:17,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:17,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:17,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 43 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:17,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:17,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:17,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:17,794 INFO L124 PetriNetUnfolderBase]: 138/287 cut-off events. [2024-06-21 16:34:17,795 INFO L125 PetriNetUnfolderBase]: For 6393/6393 co-relation queries the response was YES. [2024-06-21 16:34:17,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1372 conditions, 287 events. 138/287 cut-off events. For 6393/6393 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1099 event pairs, 45 based on Foata normal form. 2/289 useless extension candidates. Maximal degree in co-relation 1334. Up to 245 conditions per place. [2024-06-21 16:34:17,796 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 40 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-06-21 16:34:17,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 54 transitions, 403 flow [2024-06-21 16:34:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:34:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:34:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 16:34:17,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-06-21 16:34:17,797 INFO L175 Difference]: Start difference. First operand has 83 places, 43 transitions, 277 flow. Second operand 10 states and 99 transitions. [2024-06-21 16:34:17,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 54 transitions, 403 flow [2024-06-21 16:34:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 54 transitions, 365 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 16:34:17,801 INFO L231 Difference]: Finished difference. Result has 76 places, 43 transitions, 267 flow [2024-06-21 16:34:17,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=267, PETRI_PLACES=76, PETRI_TRANSITIONS=43} [2024-06-21 16:34:17,802 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2024-06-21 16:34:17,802 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 43 transitions, 267 flow [2024-06-21 16:34:17,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:17,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:17,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:17,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:34:17,803 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)] === [2024-06-21 16:34:17,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2003751036, now seen corresponding path program 20 times [2024-06-21 16:34:17,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:17,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125457791] [2024-06-21 16:34:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:17,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125457791] [2024-06-21 16:34:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125457791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:18,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:18,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:18,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721757544] [2024-06-21 16:34:18,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:18,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:18,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:18,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:18,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:18,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 43 transitions, 267 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:18,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:18,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:18,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:19,083 INFO L124 PetriNetUnfolderBase]: 133/284 cut-off events. [2024-06-21 16:34:19,083 INFO L125 PetriNetUnfolderBase]: For 5646/5646 co-relation queries the response was YES. [2024-06-21 16:34:19,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 284 events. 133/284 cut-off events. For 5646/5646 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1108 event pairs, 46 based on Foata normal form. 16/300 useless extension candidates. Maximal degree in co-relation 1056. Up to 168 conditions per place. [2024-06-21 16:34:19,084 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 31 selfloop transitions, 10 changer transitions 16/59 dead transitions. [2024-06-21 16:34:19,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 59 transitions, 417 flow [2024-06-21 16:34:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 16:34:19,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515151515151515 [2024-06-21 16:34:19,086 INFO L175 Difference]: Start difference. First operand has 76 places, 43 transitions, 267 flow. Second operand 11 states and 116 transitions. [2024-06-21 16:34:19,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 59 transitions, 417 flow [2024-06-21 16:34:19,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 59 transitions, 368 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:34:19,090 INFO L231 Difference]: Finished difference. Result has 77 places, 36 transitions, 199 flow [2024-06-21 16:34:19,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=199, PETRI_PLACES=77, PETRI_TRANSITIONS=36} [2024-06-21 16:34:19,090 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-21 16:34:19,090 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 36 transitions, 199 flow [2024-06-21 16:34:19,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:19,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:19,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:19,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:34:19,091 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)] === [2024-06-21 16:34:19,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:19,091 INFO L85 PathProgramCache]: Analyzing trace with hash -99362273, now seen corresponding path program 1 times [2024-06-21 16:34:19,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:19,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239669215] [2024-06-21 16:34:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:19,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239669215] [2024-06-21 16:34:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239669215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:20,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:20,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:34:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262993518] [2024-06-21 16:34:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:20,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:34:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:34:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:34:20,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:20,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 36 transitions, 199 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:20,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:20,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:20,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:20,390 INFO L124 PetriNetUnfolderBase]: 97/216 cut-off events. [2024-06-21 16:34:20,390 INFO L125 PetriNetUnfolderBase]: For 3974/3974 co-relation queries the response was YES. [2024-06-21 16:34:20,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 216 events. 97/216 cut-off events. For 3974/3974 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 748 event pairs, 36 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 812. Up to 155 conditions per place. [2024-06-21 16:34:20,391 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 26 selfloop transitions, 6 changer transitions 16/50 dead transitions. [2024-06-21 16:34:20,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 327 flow [2024-06-21 16:34:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-21 16:34:20,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-06-21 16:34:20,414 INFO L175 Difference]: Start difference. First operand has 77 places, 36 transitions, 199 flow. Second operand 11 states and 108 transitions. [2024-06-21 16:34:20,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 327 flow [2024-06-21 16:34:20,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 50 transitions, 290 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:34:20,417 INFO L231 Difference]: Finished difference. Result has 69 places, 31 transitions, 156 flow [2024-06-21 16:34:20,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=31} [2024-06-21 16:34:20,418 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-21 16:34:20,418 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 31 transitions, 156 flow [2024-06-21 16:34:20,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:20,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:20,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:20,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:34:20,418 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)] === [2024-06-21 16:34:20,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash 840773053, now seen corresponding path program 2 times [2024-06-21 16:34:20,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:20,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129621345] [2024-06-21 16:34:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:20,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:21,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:21,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129621345] [2024-06-21 16:34:21,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129621345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:21,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:21,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:34:21,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289791079] [2024-06-21 16:34:21,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:21,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:34:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:34:21,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:34:22,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:22,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 31 transitions, 156 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:22,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:22,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:22,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:22,272 INFO L124 PetriNetUnfolderBase]: 70/159 cut-off events. [2024-06-21 16:34:22,272 INFO L125 PetriNetUnfolderBase]: For 1946/1946 co-relation queries the response was YES. [2024-06-21 16:34:22,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 159 events. 70/159 cut-off events. For 1946/1946 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 477 event pairs, 19 based on Foata normal form. 6/165 useless extension candidates. Maximal degree in co-relation 500. Up to 86 conditions per place. [2024-06-21 16:34:22,273 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 23 selfloop transitions, 6 changer transitions 17/48 dead transitions. [2024-06-21 16:34:22,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 48 transitions, 291 flow [2024-06-21 16:34:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-21 16:34:22,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-06-21 16:34:22,274 INFO L175 Difference]: Start difference. First operand has 69 places, 31 transitions, 156 flow. Second operand 11 states and 108 transitions. [2024-06-21 16:34:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 48 transitions, 291 flow [2024-06-21 16:34:22,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 48 transitions, 271 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 16:34:22,276 INFO L231 Difference]: Finished difference. Result has 64 places, 28 transitions, 148 flow [2024-06-21 16:34:22,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=28} [2024-06-21 16:34:22,277 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-21 16:34:22,277 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 28 transitions, 148 flow [2024-06-21 16:34:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:22,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:22,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:34:22,277 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)] === [2024-06-21 16:34:22,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -600100217, now seen corresponding path program 3 times [2024-06-21 16:34:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374185003] [2024-06-21 16:34:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:23,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:23,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374185003] [2024-06-21 16:34:23,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374185003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:23,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:23,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884967868] [2024-06-21 16:34:23,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:23,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:23,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:23,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:23,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 28 transitions, 148 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:23,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:23,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:23,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:23,465 INFO L124 PetriNetUnfolderBase]: 56/129 cut-off events. [2024-06-21 16:34:23,465 INFO L125 PetriNetUnfolderBase]: For 1374/1374 co-relation queries the response was YES. [2024-06-21 16:34:23,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 129 events. 56/129 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 333 event pairs, 15 based on Foata normal form. 6/135 useless extension candidates. Maximal degree in co-relation 414. Up to 63 conditions per place. [2024-06-21 16:34:23,472 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 19 selfloop transitions, 7 changer transitions 14/42 dead transitions. [2024-06-21 16:34:23,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 42 transitions, 258 flow [2024-06-21 16:34:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-06-21 16:34:23,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-21 16:34:23,473 INFO L175 Difference]: Start difference. First operand has 64 places, 28 transitions, 148 flow. Second operand 11 states and 105 transitions. [2024-06-21 16:34:23,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 42 transitions, 258 flow [2024-06-21 16:34:23,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 241 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:23,475 INFO L231 Difference]: Finished difference. Result has 56 places, 24 transitions, 129 flow [2024-06-21 16:34:23,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=129, PETRI_PLACES=56, PETRI_TRANSITIONS=24} [2024-06-21 16:34:23,475 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2024-06-21 16:34:23,475 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 24 transitions, 129 flow [2024-06-21 16:34:23,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:23,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:23,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:23,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:34:23,476 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)] === [2024-06-21 16:34:23,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1730953191, now seen corresponding path program 4 times [2024-06-21 16:34:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:23,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861848307] [2024-06-21 16:34:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:23,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861848307] [2024-06-21 16:34:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861848307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:24,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:34:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146578750] [2024-06-21 16:34:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:34:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:34:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:34:24,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-21 16:34:24,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 24 transitions, 129 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:24,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:24,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-21 16:34:24,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:24,925 INFO L124 PetriNetUnfolderBase]: 27/70 cut-off events. [2024-06-21 16:34:24,925 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-06-21 16:34:24,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 70 events. 27/70 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 6/76 useless extension candidates. Maximal degree in co-relation 200. Up to 24 conditions per place. [2024-06-21 16:34:24,925 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2024-06-21 16:34:24,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 32 transitions, 183 flow [2024-06-21 16:34:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:34:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:34:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-06-21 16:34:24,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2024-06-21 16:34:24,926 INFO L175 Difference]: Start difference. First operand has 56 places, 24 transitions, 129 flow. Second operand 11 states and 95 transitions. [2024-06-21 16:34:24,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 32 transitions, 183 flow [2024-06-21 16:34:24,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 151 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-06-21 16:34:24,926 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2024-06-21 16:34:24,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2024-06-21 16:34:24,927 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2024-06-21 16:34:24,927 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2024-06-21 16:34:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:24,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 16:34:24,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 16:34:24,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 16:34:24,933 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 16:34:24,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:34:24,934 INFO L445 BasicCegarLoop]: Path program histogram: [20, 9, 9, 6, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:34:24,936 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 16:34:24,936 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 16:34:24,939 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 16:34:24,939 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 16:34:24,940 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 04:34:24 BasicIcfg [2024-06-21 16:34:24,940 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 16:34:24,941 INFO L158 Benchmark]: Toolchain (without parser) took 83230.24ms. Allocated memory was 148.9MB in the beginning and 952.1MB in the end (delta: 803.2MB). Free memory was 88.3MB in the beginning and 463.1MB in the end (delta: -374.9MB). Peak memory consumption was 429.2MB. Max. memory is 16.1GB. [2024-06-21 16:34:24,941 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 148.9MB. Free memory was 82.0MB in the beginning and 81.9MB in the end (delta: 142.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:34:24,941 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:34:24,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 528.04ms. Allocated memory was 148.9MB in the beginning and 205.5MB in the end (delta: 56.6MB). Free memory was 88.3MB in the beginning and 159.7MB in the end (delta: -71.5MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2024-06-21 16:34:24,943 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.80ms. Allocated memory is still 205.5MB. Free memory was 159.7MB in the beginning and 156.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 16:34:24,943 INFO L158 Benchmark]: Boogie Preprocessor took 61.58ms. Allocated memory is still 205.5MB. Free memory was 156.6MB in the beginning and 153.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 16:34:24,943 INFO L158 Benchmark]: RCFGBuilder took 556.41ms. Allocated memory is still 205.5MB. Free memory was 153.4MB in the beginning and 104.1MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2024-06-21 16:34:24,944 INFO L158 Benchmark]: TraceAbstraction took 82045.65ms. Allocated memory was 205.5MB in the beginning and 952.1MB in the end (delta: 746.6MB). Free memory was 103.1MB in the beginning and 463.1MB in the end (delta: -360.0MB). Peak memory consumption was 386.6MB. Max. memory is 16.1GB. [2024-06-21 16:34:24,945 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 148.9MB. Free memory was 82.0MB in the beginning and 81.9MB in the end (delta: 142.6kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 528.04ms. Allocated memory was 148.9MB in the beginning and 205.5MB in the end (delta: 56.6MB). Free memory was 88.3MB in the beginning and 159.7MB in the end (delta: -71.5MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.80ms. Allocated memory is still 205.5MB. Free memory was 159.7MB in the beginning and 156.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.58ms. Allocated memory is still 205.5MB. Free memory was 156.6MB in the beginning and 153.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 556.41ms. Allocated memory is still 205.5MB. Free memory was 153.4MB in the beginning and 104.1MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 82045.65ms. Allocated memory was 205.5MB in the beginning and 952.1MB in the end (delta: 746.6MB). Free memory was 103.1MB in the beginning and 463.1MB in the end (delta: -360.0MB). Peak memory consumption was 386.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 813]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 814]: 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, 48 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: 82.0s, OverallIterations: 79, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 28.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4857 SdHoareTripleChecker+Valid, 16.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4146 mSDsluCounter, 3146 SdHoareTripleChecker+Invalid, 13.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2801 mSDsCounter, 1122 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26128 IncrementalHoareTripleChecker+Invalid, 27250 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1122 mSolverCounterUnsat, 345 mSDtfsCounter, 26128 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 846 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 844 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1601occurred in iteration=36, InterpolantAutomatonStates: 727, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 52.2s InterpolantComputationTime, 1207 NumberOfCodeBlocks, 1207 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 1128 ConstructedInterpolants, 0 QuantifiedInterpolants, 48970 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 79 InterpolantComputations, 79 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! [2024-06-21 16:34:24,996 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