./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe029_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe029_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:27:38,011 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:27:38,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:27:38,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:27:38,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:27:38,115 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:27:38,115 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:27:38,116 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:27:38,116 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:27:38,120 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:27:38,120 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:27:38,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:27:38,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:27:38,123 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:27:38,123 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:27:38,123 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:27:38,124 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:27:38,124 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:27:38,124 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:27:38,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:27:38,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:27:38,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:27:38,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:27:38,126 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:27:38,126 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:27:38,126 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:27:38,127 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:27:38,127 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:27:38,127 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:27:38,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:27:38,129 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:27:38,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:27:38,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:27:38,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:27:38,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:27:38,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:27:38,130 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:27:38,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:27:38,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:27:38,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:27:38,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:27:38,131 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:27:38,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:27:38,131 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:27:38,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:27:38,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:27:38,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:27:38,421 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:27:38,422 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:27:38,423 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe029_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 17:27:39,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:27:39,834 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:27:39,840 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 17:27:39,857 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51efd3b7b/85a0fe39219446d59949a5a784cd7ed4/FLAG2565b5291 [2024-06-20 17:27:39,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51efd3b7b/85a0fe39219446d59949a5a784cd7ed4 [2024-06-20 17:27:39,876 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:27:39,876 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:27:39,877 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe029_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 17:27:40,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:27:40,025 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:27:40,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:27:40,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:27:40,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:27:40,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:27:39" (1/2) ... [2024-06-20 17:27:40,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2266c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:40, skipping insertion in model container [2024-06-20 17:27:40,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:27:39" (1/2) ... [2024-06-20 17:27:40,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ec4ed18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:27:40, skipping insertion in model container [2024-06-20 17:27:40,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:27:40" (2/2) ... [2024-06-20 17:27:40,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2266c8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40, skipping insertion in model container [2024-06-20 17:27:40,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:27:40" (2/2) ... [2024-06-20 17:27:40,038 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:27:40,119 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:27:40,120 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 17:27:40,121 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 17:27:40,121 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:27:40,121 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-20 17:27:40,152 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:27:40,509 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:27:40,523 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:27:40,643 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:27:40,696 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:27:40,696 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40 WrapperNode [2024-06-20 17:27:40,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:27:40,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:27:40,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:27:40,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:27:40,704 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 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,740 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 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,780 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 130 [2024-06-20 17:27:40,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:27:40,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:27:40,785 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:27:40,785 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:27:40,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,813 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,833 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 17:27:40,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,856 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:27:40,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:27:40,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:27:40,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:27:40,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (1/1) ... [2024-06-20 17:27:40,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:27:40,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:27:40,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:27:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:27:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:27:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:27:40,952 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:27:40,952 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:27:40,952 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:27:40,952 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:27:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:27:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:27:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:27:40,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:27:40,954 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:27:41,111 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:27:41,112 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:27:41,427 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:27:41,427 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:27:41,642 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:27:41,643 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:27:41,644 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:27:41 BoogieIcfgContainer [2024-06-20 17:27:41,644 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:27:41,647 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:27:41,647 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:27:41,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:27:41,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:27:39" (1/4) ... [2024-06-20 17:27:41,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613b0945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:27:41, skipping insertion in model container [2024-06-20 17:27:41,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:27:40" (2/4) ... [2024-06-20 17:27:41,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613b0945 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:27:41, skipping insertion in model container [2024-06-20 17:27:41,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:27:40" (3/4) ... [2024-06-20 17:27:41,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613b0945 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:27:41, skipping insertion in model container [2024-06-20 17:27:41,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:27:41" (4/4) ... [2024-06-20 17:27:41,654 INFO L112 eAbstractionObserver]: Analyzing ICFG safe029_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 17:27:41,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:27:41,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 17:27:41,670 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:27:41,736 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:27:41,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-20 17:27:41,802 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-20 17:27:41,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:27:41,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:27:41,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-20 17:27:41,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-20 17:27:41,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:27:41,829 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;@36b2dc74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:27:41,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 17:27:41,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:27:41,834 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:27:41,835 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:27:41,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:41,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:27:41,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:41,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 321409156, now seen corresponding path program 1 times [2024-06-20 17:27:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:41,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927892650] [2024-06-20 17:27:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:42,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:42,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927892650] [2024-06-20 17:27:42,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927892650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:42,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:42,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:27:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727475804] [2024-06-20 17:27:42,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:27:42,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:42,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:27:42,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:27:42,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-20 17:27:42,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:42,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:42,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-20 17:27:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:43,104 INFO L124 PetriNetUnfolderBase]: 162/296 cut-off events. [2024-06-20 17:27:43,104 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-20 17:27:43,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 296 events. 162/296 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1009 event pairs, 97 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 596. Up to 288 conditions per place. [2024-06-20 17:27:43,109 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-20 17:27:43,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 111 flow [2024-06-20 17:27:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:27:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:27:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-06-20 17:27:43,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-06-20 17:27:43,121 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 47 transitions. [2024-06-20 17:27:43,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 111 flow [2024-06-20 17:27:43,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 17:27:43,125 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-20 17:27:43,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-20 17:27:43,129 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-20 17:27:43,129 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-20 17:27:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:43,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:43,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:43,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:27:43,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:43,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash -363415325, now seen corresponding path program 1 times [2024-06-20 17:27:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528715112] [2024-06-20 17:27:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:43,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:43,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:43,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528715112] [2024-06-20 17:27:43,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528715112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:43,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:43,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:27:43,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259591778] [2024-06-20 17:27:43,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:27:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:27:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:27:43,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-20 17:27:43,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:43,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:43,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-20 17:27:43,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:43,766 INFO L124 PetriNetUnfolderBase]: 159/291 cut-off events. [2024-06-20 17:27:43,766 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-20 17:27:43,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 291 events. 159/291 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 991 event pairs, 79 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 667. Up to 274 conditions per place. [2024-06-20 17:27:43,773 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2024-06-20 17:27:43,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 153 flow [2024-06-20 17:27:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:27:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:27:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-20 17:27:43,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-20 17:27:43,777 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 60 transitions. [2024-06-20 17:27:43,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 153 flow [2024-06-20 17:27:43,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:27:43,782 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-20 17:27:43,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-06-20 17:27:43,783 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-20 17:27:43,784 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-20 17:27:43,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:43,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:43,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:43,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:27:43,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:43,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1619027845, now seen corresponding path program 1 times [2024-06-20 17:27:43,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:43,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817899400] [2024-06-20 17:27:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:44,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817899400] [2024-06-20 17:27:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817899400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:44,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:27:44,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6388616] [2024-06-20 17:27:44,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:44,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:27:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:27:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:27:44,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-20 17:27:44,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:44,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:44,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-20 17:27:44,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:44,476 INFO L124 PetriNetUnfolderBase]: 160/293 cut-off events. [2024-06-20 17:27:44,477 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-06-20 17:27:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 293 events. 160/293 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1015 event pairs, 56 based on Foata normal form. 3/295 useless extension candidates. Maximal degree in co-relation 744. Up to 248 conditions per place. [2024-06-20 17:27:44,479 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 33 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2024-06-20 17:27:44,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 245 flow [2024-06-20 17:27:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:27:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:27:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-20 17:27:44,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-06-20 17:27:44,481 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 5 states and 79 transitions. [2024-06-20 17:27:44,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 245 flow [2024-06-20 17:27:44,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 236 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 17:27:44,483 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 158 flow [2024-06-20 17:27:44,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-06-20 17:27:44,484 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-20 17:27:44,484 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 158 flow [2024-06-20 17:27:44,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:44,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:44,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:44,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:27:44,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:44,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:44,485 INFO L85 PathProgramCache]: Analyzing trace with hash -934158844, now seen corresponding path program 1 times [2024-06-20 17:27:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:44,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188174717] [2024-06-20 17:27:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188174717] [2024-06-20 17:27:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188174717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:27:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300685860] [2024-06-20 17:27:45,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:27:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:27:45,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:27:45,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-20 17:27:45,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:45,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:45,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-20 17:27:45,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:45,424 INFO L124 PetriNetUnfolderBase]: 179/325 cut-off events. [2024-06-20 17:27:45,424 INFO L125 PetriNetUnfolderBase]: For 382/382 co-relation queries the response was YES. [2024-06-20 17:27:45,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 325 events. 179/325 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1153 event pairs, 40 based on Foata normal form. 5/329 useless extension candidates. Maximal degree in co-relation 975. Up to 204 conditions per place. [2024-06-20 17:27:45,427 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 19 changer transitions 0/67 dead transitions. [2024-06-20 17:27:45,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 400 flow [2024-06-20 17:27:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 17:27:45,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-20 17:27:45,429 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 158 flow. Second operand 6 states and 102 transitions. [2024-06-20 17:27:45,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 400 flow [2024-06-20 17:27:45,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 396 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 17:27:45,433 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 273 flow [2024-06-20 17:27:45,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-06-20 17:27:45,434 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-20 17:27:45,434 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 273 flow [2024-06-20 17:27:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:45,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:45,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:45,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:27:45,434 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)] === [2024-06-20 17:27:45,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1107631940, now seen corresponding path program 1 times [2024-06-20 17:27:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160583552] [2024-06-20 17:27:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:46,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:46,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160583552] [2024-06-20 17:27:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160583552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:46,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:46,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:27:46,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426308894] [2024-06-20 17:27:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:46,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:27:46,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:27:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:27:46,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-20 17:27:46,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 273 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:46,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:46,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-20 17:27:46,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:46,499 INFO L124 PetriNetUnfolderBase]: 199/377 cut-off events. [2024-06-20 17:27:46,500 INFO L125 PetriNetUnfolderBase]: For 787/787 co-relation queries the response was YES. [2024-06-20 17:27:46,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 377 events. 199/377 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1471 event pairs, 27 based on Foata normal form. 16/392 useless extension candidates. Maximal degree in co-relation 1323. Up to 172 conditions per place. [2024-06-20 17:27:46,503 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 49 selfloop transitions, 21 changer transitions 0/73 dead transitions. [2024-06-20 17:27:46,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 503 flow [2024-06-20 17:27:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:46,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:27:46,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665024630541872 [2024-06-20 17:27:46,505 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 273 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:27:46,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 503 flow [2024-06-20 17:27:46,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 491 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 17:27:46,510 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 307 flow [2024-06-20 17:27:46,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-20 17:27:46,511 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-06-20 17:27:46,511 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 307 flow [2024-06-20 17:27:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:46,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:46,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:46,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:27:46,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:46,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 517624212, now seen corresponding path program 1 times [2024-06-20 17:27:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:46,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343007976] [2024-06-20 17:27:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:47,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343007976] [2024-06-20 17:27:47,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343007976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:47,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:47,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:27:47,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554008319] [2024-06-20 17:27:47,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:47,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:27:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:27:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:27:47,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:47,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:47,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:47,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:47,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:47,317 INFO L124 PetriNetUnfolderBase]: 197/374 cut-off events. [2024-06-20 17:27:47,317 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2024-06-20 17:27:47,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 374 events. 197/374 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1449 event pairs, 58 based on Foata normal form. 1/374 useless extension candidates. Maximal degree in co-relation 1431. Up to 363 conditions per place. [2024-06-20 17:27:47,321 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 41 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-20 17:27:47,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 413 flow [2024-06-20 17:27:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:27:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:27:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-06-20 17:27:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-20 17:27:47,323 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 307 flow. Second operand 5 states and 53 transitions. [2024-06-20 17:27:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 413 flow [2024-06-20 17:27:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 367 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:27:47,328 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 278 flow [2024-06-20 17:27:47,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-20 17:27:47,331 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-06-20 17:27:47,331 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 278 flow [2024-06-20 17:27:47,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:47,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:47,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:47,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:27:47,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:47,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1134382894, now seen corresponding path program 1 times [2024-06-20 17:27:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:47,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928494496] [2024-06-20 17:27:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:47,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:47,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928494496] [2024-06-20 17:27:47,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928494496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:47,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:47,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:27:47,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923579571] [2024-06-20 17:27:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:27:47,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:47,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:27:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:27:47,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:47,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:47,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:47,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:47,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:48,170 INFO L124 PetriNetUnfolderBase]: 193/368 cut-off events. [2024-06-20 17:27:48,170 INFO L125 PetriNetUnfolderBase]: For 926/926 co-relation queries the response was YES. [2024-06-20 17:27:48,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 368 events. 193/368 cut-off events. For 926/926 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1419 event pairs, 56 based on Foata normal form. 2/369 useless extension candidates. Maximal degree in co-relation 1346. Up to 351 conditions per place. [2024-06-20 17:27:48,173 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 41 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2024-06-20 17:27:48,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 392 flow [2024-06-20 17:27:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-06-20 17:27:48,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-20 17:27:48,175 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 278 flow. Second operand 6 states and 62 transitions. [2024-06-20 17:27:48,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 392 flow [2024-06-20 17:27:48,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 377 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 17:27:48,179 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 284 flow [2024-06-20 17:27:48,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-20 17:27:48,181 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-20 17:27:48,181 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 284 flow [2024-06-20 17:27:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:48,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:48,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:48,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:27:48,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:48,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1615315823, now seen corresponding path program 1 times [2024-06-20 17:27:48,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:48,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92037920] [2024-06-20 17:27:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:48,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:48,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:48,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92037920] [2024-06-20 17:27:48,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92037920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:48,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:48,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:27:48,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463059267] [2024-06-20 17:27:48,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:48,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:27:48,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:48,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:27:48,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:27:48,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:48,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:48,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:48,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:48,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:49,022 INFO L124 PetriNetUnfolderBase]: 194/370 cut-off events. [2024-06-20 17:27:49,023 INFO L125 PetriNetUnfolderBase]: For 1057/1057 co-relation queries the response was YES. [2024-06-20 17:27:49,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 370 events. 194/370 cut-off events. For 1057/1057 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1436 event pairs, 55 based on Foata normal form. 2/371 useless extension candidates. Maximal degree in co-relation 1392. Up to 325 conditions per place. [2024-06-20 17:27:49,025 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2024-06-20 17:27:49,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 446 flow [2024-06-20 17:27:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-20 17:27:49,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-20 17:27:49,027 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 284 flow. Second operand 6 states and 69 transitions. [2024-06-20 17:27:49,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 446 flow [2024-06-20 17:27:49,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 420 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:49,031 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 309 flow [2024-06-20 17:27:49,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-20 17:27:49,031 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-20 17:27:49,031 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 309 flow [2024-06-20 17:27:49,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:49,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:49,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:49,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:27:49,032 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:49,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash -779326733, now seen corresponding path program 2 times [2024-06-20 17:27:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:49,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428556533] [2024-06-20 17:27:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:49,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:49,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428556533] [2024-06-20 17:27:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428556533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:49,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:49,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:27:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578232528] [2024-06-20 17:27:49,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:27:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:27:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:27:49,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:49,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:49,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:49,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:49,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:49,800 INFO L124 PetriNetUnfolderBase]: 189/360 cut-off events. [2024-06-20 17:27:49,800 INFO L125 PetriNetUnfolderBase]: For 1155/1155 co-relation queries the response was YES. [2024-06-20 17:27:49,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 360 events. 189/360 cut-off events. For 1155/1155 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1383 event pairs, 50 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 1381. Up to 346 conditions per place. [2024-06-20 17:27:49,803 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 42 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-20 17:27:49,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 423 flow [2024-06-20 17:27:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:27:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:27:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-06-20 17:27:49,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3505747126436782 [2024-06-20 17:27:49,805 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 309 flow. Second operand 6 states and 61 transitions. [2024-06-20 17:27:49,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 423 flow [2024-06-20 17:27:49,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 408 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:49,812 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 315 flow [2024-06-20 17:27:49,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-20 17:27:49,813 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-20 17:27:49,813 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 315 flow [2024-06-20 17:27:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:49,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:49,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:49,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:27:49,814 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:49,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1464817657, now seen corresponding path program 1 times [2024-06-20 17:27:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842576698] [2024-06-20 17:27:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:49,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:50,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:50,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842576698] [2024-06-20 17:27:50,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842576698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:50,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:50,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13035790] [2024-06-20 17:27:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:50,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:50,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:50,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:50,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 315 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:50,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:50,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:50,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:50,759 INFO L124 PetriNetUnfolderBase]: 209/394 cut-off events. [2024-06-20 17:27:50,759 INFO L125 PetriNetUnfolderBase]: For 1614/1614 co-relation queries the response was YES. [2024-06-20 17:27:50,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1532 conditions, 394 events. 209/394 cut-off events. For 1614/1614 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1531 event pairs, 41 based on Foata normal form. 6/399 useless extension candidates. Maximal degree in co-relation 1504. Up to 244 conditions per place. [2024-06-20 17:27:50,762 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2024-06-20 17:27:50,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 571 flow [2024-06-20 17:27:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-20 17:27:50,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43842364532019706 [2024-06-20 17:27:50,764 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 315 flow. Second operand 7 states and 89 transitions. [2024-06-20 17:27:50,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 571 flow [2024-06-20 17:27:50,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 537 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:50,769 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 403 flow [2024-06-20 17:27:50,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-20 17:27:50,770 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-20 17:27:50,772 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 403 flow [2024-06-20 17:27:50,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:50,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:50,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:50,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:27:50,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:50,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1610912821, now seen corresponding path program 2 times [2024-06-20 17:27:50,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:50,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293223765] [2024-06-20 17:27:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293223765] [2024-06-20 17:27:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293223765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:51,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782509846] [2024-06-20 17:27:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:51,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:51,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:51,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 403 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:51,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:51,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:51,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:51,650 INFO L124 PetriNetUnfolderBase]: 215/404 cut-off events. [2024-06-20 17:27:51,650 INFO L125 PetriNetUnfolderBase]: For 1853/1853 co-relation queries the response was YES. [2024-06-20 17:27:51,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 404 events. 215/404 cut-off events. For 1853/1853 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1585 event pairs, 51 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1712. Up to 381 conditions per place. [2024-06-20 17:27:51,654 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 53 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-06-20 17:27:51,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 580 flow [2024-06-20 17:27:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-20 17:27:51,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2024-06-20 17:27:51,656 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 403 flow. Second operand 7 states and 71 transitions. [2024-06-20 17:27:51,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 580 flow [2024-06-20 17:27:51,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 564 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:27:51,662 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 454 flow [2024-06-20 17:27:51,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-20 17:27:51,663 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2024-06-20 17:27:51,663 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 454 flow [2024-06-20 17:27:51,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:51,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:51,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:27:51,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:51,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1632153749, now seen corresponding path program 3 times [2024-06-20 17:27:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:51,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451376181] [2024-06-20 17:27:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:51,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:52,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:52,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451376181] [2024-06-20 17:27:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451376181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:52,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:52,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69584473] [2024-06-20 17:27:52,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:52,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:52,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:52,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:52,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:52,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:52,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:52,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:52,502 INFO L124 PetriNetUnfolderBase]: 216/406 cut-off events. [2024-06-20 17:27:52,502 INFO L125 PetriNetUnfolderBase]: For 2119/2119 co-relation queries the response was YES. [2024-06-20 17:27:52,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 406 events. 216/406 cut-off events. For 2119/2119 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1590 event pairs, 50 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 1807. Up to 370 conditions per place. [2024-06-20 17:27:52,506 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 53 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-20 17:27:52,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 662 flow [2024-06-20 17:27:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-20 17:27:52,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2024-06-20 17:27:52,508 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 454 flow. Second operand 7 states and 75 transitions. [2024-06-20 17:27:52,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 662 flow [2024-06-20 17:27:52,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 644 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:52,516 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 495 flow [2024-06-20 17:27:52,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=495, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-06-20 17:27:52,518 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-20 17:27:52,518 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 495 flow [2024-06-20 17:27:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:52,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:52,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:52,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:27:52,519 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:52,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash 779752849, now seen corresponding path program 1 times [2024-06-20 17:27:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:52,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704282876] [2024-06-20 17:27:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:53,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:53,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704282876] [2024-06-20 17:27:53,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704282876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:53,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:53,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:27:53,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103650431] [2024-06-20 17:27:53,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:53,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:27:53,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:53,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:27:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:27:53,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:53,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 495 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:53,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:53,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:53,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:53,936 INFO L124 PetriNetUnfolderBase]: 213/401 cut-off events. [2024-06-20 17:27:53,936 INFO L125 PetriNetUnfolderBase]: For 2316/2316 co-relation queries the response was YES. [2024-06-20 17:27:53,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 401 events. 213/401 cut-off events. For 2316/2316 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1561 event pairs, 49 based on Foata normal form. 2/402 useless extension candidates. Maximal degree in co-relation 1809. Up to 378 conditions per place. [2024-06-20 17:27:53,940 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 57 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-20 17:27:53,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 647 flow [2024-06-20 17:27:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2024-06-20 17:27:53,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399014778325123 [2024-06-20 17:27:53,941 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 495 flow. Second operand 7 states and 69 transitions. [2024-06-20 17:27:53,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 647 flow [2024-06-20 17:27:53,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 617 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:27:53,952 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 489 flow [2024-06-20 17:27:53,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-06-20 17:27:53,953 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-06-20 17:27:53,953 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 489 flow [2024-06-20 17:27:53,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:53,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:53,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:53,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:27:53,954 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:53,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash 795136220, now seen corresponding path program 1 times [2024-06-20 17:27:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:53,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596523417] [2024-06-20 17:27:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:54,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:54,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596523417] [2024-06-20 17:27:54,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596523417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:54,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:54,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234661780] [2024-06-20 17:27:54,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:54,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:54,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:54,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:54,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 489 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:54,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:54,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:54,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:54,897 INFO L124 PetriNetUnfolderBase]: 216/406 cut-off events. [2024-06-20 17:27:54,897 INFO L125 PetriNetUnfolderBase]: For 2542/2542 co-relation queries the response was YES. [2024-06-20 17:27:54,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 406 events. 216/406 cut-off events. For 2542/2542 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1582 event pairs, 39 based on Foata normal form. 1/406 useless extension candidates. Maximal degree in co-relation 1837. Up to 264 conditions per place. [2024-06-20 17:27:54,901 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 53 selfloop transitions, 25 changer transitions 0/80 dead transitions. [2024-06-20 17:27:54,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 760 flow [2024-06-20 17:27:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-20 17:27:54,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:27:54,902 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 489 flow. Second operand 7 states and 87 transitions. [2024-06-20 17:27:54,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 760 flow [2024-06-20 17:27:54,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 732 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:54,910 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 535 flow [2024-06-20 17:27:54,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=535, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-06-20 17:27:54,911 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-06-20 17:27:54,911 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 535 flow [2024-06-20 17:27:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:54,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:54,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:54,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:27:54,912 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:54,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1839017262, now seen corresponding path program 2 times [2024-06-20 17:27:54,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:54,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590037581] [2024-06-20 17:27:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590037581] [2024-06-20 17:27:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590037581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:55,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:55,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030892895] [2024-06-20 17:27:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:55,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:55,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:55,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 535 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:55,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:55,844 INFO L124 PetriNetUnfolderBase]: 208/393 cut-off events. [2024-06-20 17:27:55,844 INFO L125 PetriNetUnfolderBase]: For 2804/2804 co-relation queries the response was YES. [2024-06-20 17:27:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1846 conditions, 393 events. 208/393 cut-off events. For 2804/2804 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1528 event pairs, 36 based on Foata normal form. 3/395 useless extension candidates. Maximal degree in co-relation 1811. Up to 281 conditions per place. [2024-06-20 17:27:55,847 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 23 changer transitions 0/77 dead transitions. [2024-06-20 17:27:55,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 751 flow [2024-06-20 17:27:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-20 17:27:55,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187192118226601 [2024-06-20 17:27:55,849 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 535 flow. Second operand 7 states and 85 transitions. [2024-06-20 17:27:55,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 751 flow [2024-06-20 17:27:55,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 699 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:27:55,859 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 536 flow [2024-06-20 17:27:55,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2024-06-20 17:27:55,860 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2024-06-20 17:27:55,861 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 536 flow [2024-06-20 17:27:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:55,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:55,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:55,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:27:55,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:55,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash 798951235, now seen corresponding path program 1 times [2024-06-20 17:27:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:55,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350404171] [2024-06-20 17:27:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:56,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350404171] [2024-06-20 17:27:56,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350404171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:56,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:56,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:56,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032228300] [2024-06-20 17:27:56,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:56,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:56,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:56,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:56,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:56,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:56,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:56,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:56,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:56,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:56,639 INFO L124 PetriNetUnfolderBase]: 224/419 cut-off events. [2024-06-20 17:27:56,640 INFO L125 PetriNetUnfolderBase]: For 3312/3312 co-relation queries the response was YES. [2024-06-20 17:27:56,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 419 events. 224/419 cut-off events. For 3312/3312 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1642 event pairs, 38 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 1971. Up to 243 conditions per place. [2024-06-20 17:27:56,643 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 46 selfloop transitions, 33 changer transitions 1/82 dead transitions. [2024-06-20 17:27:56,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 832 flow [2024-06-20 17:27:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-20 17:27:56,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-06-20 17:27:56,645 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 536 flow. Second operand 7 states and 86 transitions. [2024-06-20 17:27:56,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 832 flow [2024-06-20 17:27:56,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 746 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:56,655 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 571 flow [2024-06-20 17:27:56,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=571, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-06-20 17:27:56,655 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2024-06-20 17:27:56,656 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 571 flow [2024-06-20 17:27:56,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:56,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:56,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:27:56,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:56,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 798945655, now seen corresponding path program 2 times [2024-06-20 17:27:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638740959] [2024-06-20 17:27:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:56,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:57,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:57,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638740959] [2024-06-20 17:27:57,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638740959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:57,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:57,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625173056] [2024-06-20 17:27:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:57,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:57,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 571 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:57,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:57,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:57,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:57,408 INFO L124 PetriNetUnfolderBase]: 212/403 cut-off events. [2024-06-20 17:27:57,408 INFO L125 PetriNetUnfolderBase]: For 3495/3495 co-relation queries the response was YES. [2024-06-20 17:27:57,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 403 events. 212/403 cut-off events. For 3495/3495 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1593 event pairs, 37 based on Foata normal form. 4/406 useless extension candidates. Maximal degree in co-relation 1900. Up to 239 conditions per place. [2024-06-20 17:27:57,412 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 47 selfloop transitions, 34 changer transitions 1/84 dead transitions. [2024-06-20 17:27:57,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 847 flow [2024-06-20 17:27:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-20 17:27:57,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-06-20 17:27:57,414 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 571 flow. Second operand 7 states and 91 transitions. [2024-06-20 17:27:57,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 847 flow [2024-06-20 17:27:57,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 817 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:57,423 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 608 flow [2024-06-20 17:27:57,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-06-20 17:27:57,424 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2024-06-20 17:27:57,424 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 608 flow [2024-06-20 17:27:57,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:57,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:57,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:57,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:27:57,425 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:57,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1601302012, now seen corresponding path program 1 times [2024-06-20 17:27:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:57,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88496696] [2024-06-20 17:27:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:57,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:58,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:58,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88496696] [2024-06-20 17:27:58,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88496696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:58,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:58,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:27:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713328254] [2024-06-20 17:27:58,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:27:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:27:58,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:27:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:58,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 608 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:58,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:58,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:58,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:58,542 INFO L124 PetriNetUnfolderBase]: 206/396 cut-off events. [2024-06-20 17:27:58,542 INFO L125 PetriNetUnfolderBase]: For 3481/3481 co-relation queries the response was YES. [2024-06-20 17:27:58,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1946 conditions, 396 events. 206/396 cut-off events. For 3481/3481 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1561 event pairs, 46 based on Foata normal form. 1/396 useless extension candidates. Maximal degree in co-relation 1907. Up to 370 conditions per place. [2024-06-20 17:27:58,546 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 58 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-20 17:27:58,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 73 transitions, 770 flow [2024-06-20 17:27:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-20 17:27:58,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2024-06-20 17:27:58,548 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 608 flow. Second operand 7 states and 71 transitions. [2024-06-20 17:27:58,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 73 transitions, 770 flow [2024-06-20 17:27:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 683 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:58,558 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 555 flow [2024-06-20 17:27:58,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2024-06-20 17:27:58,559 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-20 17:27:58,559 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 555 flow [2024-06-20 17:27:58,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:58,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:58,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:27:58,560 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:58,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash -631830983, now seen corresponding path program 3 times [2024-06-20 17:27:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:58,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974702699] [2024-06-20 17:27:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:58,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974702699] [2024-06-20 17:27:59,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974702699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:59,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:59,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:27:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975363384] [2024-06-20 17:27:59,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:59,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:27:59,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:27:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:27:59,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:27:59,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 555 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:59,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:59,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:27:59,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:59,348 INFO L124 PetriNetUnfolderBase]: 205/393 cut-off events. [2024-06-20 17:27:59,349 INFO L125 PetriNetUnfolderBase]: For 3516/3516 co-relation queries the response was YES. [2024-06-20 17:27:59,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 393 events. 205/393 cut-off events. For 3516/3516 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1539 event pairs, 38 based on Foata normal form. 2/394 useless extension candidates. Maximal degree in co-relation 1831. Up to 362 conditions per place. [2024-06-20 17:27:59,353 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 61 selfloop transitions, 12 changer transitions 1/76 dead transitions. [2024-06-20 17:27:59,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 745 flow [2024-06-20 17:27:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-20 17:27:59,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-20 17:27:59,354 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 555 flow. Second operand 7 states and 73 transitions. [2024-06-20 17:27:59,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 745 flow [2024-06-20 17:27:59,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 703 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:59,368 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 552 flow [2024-06-20 17:27:59,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-06-20 17:27:59,368 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-20 17:27:59,369 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 552 flow [2024-06-20 17:27:59,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:59,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:59,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:59,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:27:59,369 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:27:59,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1120640912, now seen corresponding path program 1 times [2024-06-20 17:27:59,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:59,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82161110] [2024-06-20 17:27:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:00,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:00,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82161110] [2024-06-20 17:28:00,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82161110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:00,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:00,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:00,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464440651] [2024-06-20 17:28:00,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:00,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:00,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:00,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 552 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:00,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:00,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:00,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:00,454 INFO L124 PetriNetUnfolderBase]: 198/384 cut-off events. [2024-06-20 17:28:00,455 INFO L125 PetriNetUnfolderBase]: For 3552/3552 co-relation queries the response was YES. [2024-06-20 17:28:00,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 384 events. 198/384 cut-off events. For 3552/3552 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1512 event pairs, 23 based on Foata normal form. 2/385 useless extension candidates. Maximal degree in co-relation 1784. Up to 280 conditions per place. [2024-06-20 17:28:00,458 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 64 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-20 17:28:00,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 823 flow [2024-06-20 17:28:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-20 17:28:00,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:28:00,460 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 552 flow. Second operand 8 states and 87 transitions. [2024-06-20 17:28:00,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 823 flow [2024-06-20 17:28:00,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 801 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:00,471 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 613 flow [2024-06-20 17:28:00,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2024-06-20 17:28:00,472 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2024-06-20 17:28:00,472 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 613 flow [2024-06-20 17:28:00,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:00,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:00,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:00,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:28:00,473 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:00,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:00,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1175075100, now seen corresponding path program 2 times [2024-06-20 17:28:00,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:00,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919165349] [2024-06-20 17:28:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:00,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:01,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919165349] [2024-06-20 17:28:01,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919165349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:01,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:01,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904364289] [2024-06-20 17:28:01,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:01,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:01,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:01,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:01,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:01,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:01,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 613 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:01,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:01,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:01,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:01,557 INFO L124 PetriNetUnfolderBase]: 202/392 cut-off events. [2024-06-20 17:28:01,557 INFO L125 PetriNetUnfolderBase]: For 4057/4057 co-relation queries the response was YES. [2024-06-20 17:28:01,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 conditions, 392 events. 202/392 cut-off events. For 4057/4057 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1563 event pairs, 37 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1905. Up to 250 conditions per place. [2024-06-20 17:28:01,560 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 55 selfloop transitions, 31 changer transitions 0/88 dead transitions. [2024-06-20 17:28:01,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 881 flow [2024-06-20 17:28:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-20 17:28:01,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-20 17:28:01,562 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 613 flow. Second operand 8 states and 94 transitions. [2024-06-20 17:28:01,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 881 flow [2024-06-20 17:28:01,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 88 transitions, 828 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:01,574 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 640 flow [2024-06-20 17:28:01,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=640, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2024-06-20 17:28:01,575 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2024-06-20 17:28:01,575 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 640 flow [2024-06-20 17:28:01,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:01,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:01,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:28:01,576 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:01,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1174959780, now seen corresponding path program 3 times [2024-06-20 17:28:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720358677] [2024-06-20 17:28:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:02,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:02,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720358677] [2024-06-20 17:28:02,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720358677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:02,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:02,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:02,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792784228] [2024-06-20 17:28:02,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:02,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:02,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:02,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:02,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:02,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:02,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 640 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:02,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:02,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:02,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:02,575 INFO L124 PetriNetUnfolderBase]: 215/423 cut-off events. [2024-06-20 17:28:02,576 INFO L125 PetriNetUnfolderBase]: For 6158/6158 co-relation queries the response was YES. [2024-06-20 17:28:02,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 423 events. 215/423 cut-off events. For 6158/6158 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1752 event pairs, 38 based on Foata normal form. 12/434 useless extension candidates. Maximal degree in co-relation 1954. Up to 258 conditions per place. [2024-06-20 17:28:02,579 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 55 selfloop transitions, 25 changer transitions 8/90 dead transitions. [2024-06-20 17:28:02,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 916 flow [2024-06-20 17:28:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-20 17:28:02,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-20 17:28:02,581 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 640 flow. Second operand 8 states and 97 transitions. [2024-06-20 17:28:02,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 916 flow [2024-06-20 17:28:02,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 844 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:02,595 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 597 flow [2024-06-20 17:28:02,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=597, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2024-06-20 17:28:02,595 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-06-20 17:28:02,595 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 597 flow [2024-06-20 17:28:02,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:02,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:02,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:28:02,596 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:02,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash -101669968, now seen corresponding path program 1 times [2024-06-20 17:28:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:02,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639270653] [2024-06-20 17:28:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:03,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:03,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639270653] [2024-06-20 17:28:03,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639270653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:03,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:03,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:03,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360201161] [2024-06-20 17:28:03,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:03,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:03,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:03,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:03,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 597 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:03,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:03,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:03,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:03,701 INFO L124 PetriNetUnfolderBase]: 213/425 cut-off events. [2024-06-20 17:28:03,701 INFO L125 PetriNetUnfolderBase]: For 7111/7111 co-relation queries the response was YES. [2024-06-20 17:28:03,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 425 events. 213/425 cut-off events. For 7111/7111 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1815 event pairs, 38 based on Foata normal form. 14/438 useless extension candidates. Maximal degree in co-relation 1902. Up to 229 conditions per place. [2024-06-20 17:28:03,704 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 48 selfloop transitions, 30 changer transitions 8/88 dead transitions. [2024-06-20 17:28:03,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 88 transitions, 877 flow [2024-06-20 17:28:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-20 17:28:03,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2024-06-20 17:28:03,707 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 597 flow. Second operand 8 states and 98 transitions. [2024-06-20 17:28:03,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 88 transitions, 877 flow [2024-06-20 17:28:03,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 88 transitions, 825 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:03,720 INFO L231 Difference]: Finished difference. Result has 92 places, 65 transitions, 590 flow [2024-06-20 17:28:03,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=590, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2024-06-20 17:28:03,721 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2024-06-20 17:28:03,721 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 590 flow [2024-06-20 17:28:03,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:03,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:03,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:28:03,722 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:03,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1671114070, now seen corresponding path program 2 times [2024-06-20 17:28:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191577013] [2024-06-20 17:28:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:04,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:04,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191577013] [2024-06-20 17:28:04,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191577013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:04,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:04,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:04,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595938989] [2024-06-20 17:28:04,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:04,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:04,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:04,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:04,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 590 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:04,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:04,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:04,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:04,848 INFO L124 PetriNetUnfolderBase]: 191/383 cut-off events. [2024-06-20 17:28:04,849 INFO L125 PetriNetUnfolderBase]: For 4762/4762 co-relation queries the response was YES. [2024-06-20 17:28:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 383 events. 191/383 cut-off events. For 4762/4762 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1558 event pairs, 35 based on Foata normal form. 2/384 useless extension candidates. Maximal degree in co-relation 1822. Up to 342 conditions per place. [2024-06-20 17:28:04,852 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 58 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-20 17:28:04,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 77 transitions, 776 flow [2024-06-20 17:28:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-20 17:28:04,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-20 17:28:04,853 INFO L175 Difference]: Start difference. First operand has 92 places, 65 transitions, 590 flow. Second operand 8 states and 82 transitions. [2024-06-20 17:28:04,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 77 transitions, 776 flow [2024-06-20 17:28:04,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 77 transitions, 707 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:04,866 INFO L231 Difference]: Finished difference. Result has 93 places, 66 transitions, 569 flow [2024-06-20 17:28:04,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=569, PETRI_PLACES=93, PETRI_TRANSITIONS=66} [2024-06-20 17:28:04,867 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-06-20 17:28:04,867 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 66 transitions, 569 flow [2024-06-20 17:28:04,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:04,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:04,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:04,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:28:04,868 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:04,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:04,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1896654294, now seen corresponding path program 3 times [2024-06-20 17:28:04,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:04,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257418713] [2024-06-20 17:28:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:04,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:05,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:05,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257418713] [2024-06-20 17:28:05,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257418713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:05,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:05,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:05,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839059937] [2024-06-20 17:28:05,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:05,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:05,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:05,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:05,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:05,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 66 transitions, 569 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:05,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:05,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:05,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:06,077 INFO L124 PetriNetUnfolderBase]: 195/391 cut-off events. [2024-06-20 17:28:06,077 INFO L125 PetriNetUnfolderBase]: For 5037/5037 co-relation queries the response was YES. [2024-06-20 17:28:06,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 391 events. 195/391 cut-off events. For 5037/5037 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1587 event pairs, 35 based on Foata normal form. 2/392 useless extension candidates. Maximal degree in co-relation 1827. Up to 360 conditions per place. [2024-06-20 17:28:06,080 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 63 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-20 17:28:06,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 78 transitions, 763 flow [2024-06-20 17:28:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2024-06-20 17:28:06,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31800766283524906 [2024-06-20 17:28:06,082 INFO L175 Difference]: Start difference. First operand has 93 places, 66 transitions, 569 flow. Second operand 9 states and 83 transitions. [2024-06-20 17:28:06,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 78 transitions, 763 flow [2024-06-20 17:28:06,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 78 transitions, 723 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:06,096 INFO L231 Difference]: Finished difference. Result has 97 places, 69 transitions, 588 flow [2024-06-20 17:28:06,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=588, PETRI_PLACES=97, PETRI_TRANSITIONS=69} [2024-06-20 17:28:06,097 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 69 predicate places. [2024-06-20 17:28:06,097 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 69 transitions, 588 flow [2024-06-20 17:28:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:06,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:06,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:06,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:28:06,098 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:06,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1896357624, now seen corresponding path program 4 times [2024-06-20 17:28:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:06,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948629266] [2024-06-20 17:28:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:06,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948629266] [2024-06-20 17:28:06,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948629266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:06,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:06,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914566284] [2024-06-20 17:28:06,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:06,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:06,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 69 transitions, 588 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:06,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:06,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:06,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:07,207 INFO L124 PetriNetUnfolderBase]: 192/386 cut-off events. [2024-06-20 17:28:07,207 INFO L125 PetriNetUnfolderBase]: For 4884/4884 co-relation queries the response was YES. [2024-06-20 17:28:07,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 386 events. 192/386 cut-off events. For 4884/4884 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1589 event pairs, 34 based on Foata normal form. 2/387 useless extension candidates. Maximal degree in co-relation 1769. Up to 352 conditions per place. [2024-06-20 17:28:07,211 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 61 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-06-20 17:28:07,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 78 transitions, 762 flow [2024-06-20 17:28:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-06-20 17:28:07,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34051724137931033 [2024-06-20 17:28:07,212 INFO L175 Difference]: Start difference. First operand has 97 places, 69 transitions, 588 flow. Second operand 8 states and 79 transitions. [2024-06-20 17:28:07,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 78 transitions, 762 flow [2024-06-20 17:28:07,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 78 transitions, 732 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:07,228 INFO L231 Difference]: Finished difference. Result has 99 places, 69 transitions, 593 flow [2024-06-20 17:28:07,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=593, PETRI_PLACES=99, PETRI_TRANSITIONS=69} [2024-06-20 17:28:07,229 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 71 predicate places. [2024-06-20 17:28:07,229 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 69 transitions, 593 flow [2024-06-20 17:28:07,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:07,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:07,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:07,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:28:07,230 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:07,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:07,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2009849768, now seen corresponding path program 1 times [2024-06-20 17:28:07,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:07,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992180332] [2024-06-20 17:28:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:07,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:07,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992180332] [2024-06-20 17:28:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992180332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:07,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:07,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221625839] [2024-06-20 17:28:07,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:07,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:07,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:07,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 69 transitions, 593 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:07,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:07,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:07,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:08,133 INFO L124 PetriNetUnfolderBase]: 187/371 cut-off events. [2024-06-20 17:28:08,134 INFO L125 PetriNetUnfolderBase]: For 4605/4605 co-relation queries the response was YES. [2024-06-20 17:28:08,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 371 events. 187/371 cut-off events. For 4605/4605 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1501 event pairs, 33 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 1700. Up to 334 conditions per place. [2024-06-20 17:28:08,137 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 57 selfloop transitions, 15 changer transitions 3/77 dead transitions. [2024-06-20 17:28:08,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 77 transitions, 765 flow [2024-06-20 17:28:08,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-20 17:28:08,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-20 17:28:08,138 INFO L175 Difference]: Start difference. First operand has 99 places, 69 transitions, 593 flow. Second operand 7 states and 73 transitions. [2024-06-20 17:28:08,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 77 transitions, 765 flow [2024-06-20 17:28:08,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 77 transitions, 710 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:08,154 INFO L231 Difference]: Finished difference. Result has 99 places, 66 transitions, 539 flow [2024-06-20 17:28:08,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=539, PETRI_PLACES=99, PETRI_TRANSITIONS=66} [2024-06-20 17:28:08,155 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 71 predicate places. [2024-06-20 17:28:08,155 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 66 transitions, 539 flow [2024-06-20 17:28:08,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:08,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:08,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:08,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:28:08,156 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:08,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:08,156 INFO L85 PathProgramCache]: Analyzing trace with hash -380129286, now seen corresponding path program 1 times [2024-06-20 17:28:08,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:08,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020735038] [2024-06-20 17:28:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:08,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020735038] [2024-06-20 17:28:08,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020735038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:08,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:08,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377930845] [2024-06-20 17:28:08,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:08,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:08,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:08,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:08,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 66 transitions, 539 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:08,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:08,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:08,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:09,061 INFO L124 PetriNetUnfolderBase]: 204/410 cut-off events. [2024-06-20 17:28:09,061 INFO L125 PetriNetUnfolderBase]: For 9892/9892 co-relation queries the response was YES. [2024-06-20 17:28:09,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 410 events. 204/410 cut-off events. For 9892/9892 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1713 event pairs, 49 based on Foata normal form. 8/417 useless extension candidates. Maximal degree in co-relation 1941. Up to 176 conditions per place. [2024-06-20 17:28:09,066 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 52 selfloop transitions, 21 changer transitions 12/87 dead transitions. [2024-06-20 17:28:09,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 87 transitions, 825 flow [2024-06-20 17:28:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-20 17:28:09,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-20 17:28:09,069 INFO L175 Difference]: Start difference. First operand has 99 places, 66 transitions, 539 flow. Second operand 8 states and 94 transitions. [2024-06-20 17:28:09,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 87 transitions, 825 flow [2024-06-20 17:28:09,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 727 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-20 17:28:09,086 INFO L231 Difference]: Finished difference. Result has 95 places, 64 transitions, 477 flow [2024-06-20 17:28:09,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=95, PETRI_TRANSITIONS=64} [2024-06-20 17:28:09,092 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2024-06-20 17:28:09,092 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 64 transitions, 477 flow [2024-06-20 17:28:09,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:09,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:09,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:09,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:28:09,093 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:09,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -295138446, now seen corresponding path program 2 times [2024-06-20 17:28:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245088954] [2024-06-20 17:28:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245088954] [2024-06-20 17:28:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245088954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:09,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106719306] [2024-06-20 17:28:09,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:09,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:09,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:09,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 64 transitions, 477 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:09,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:09,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:09,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:09,977 INFO L124 PetriNetUnfolderBase]: 211/431 cut-off events. [2024-06-20 17:28:09,977 INFO L125 PetriNetUnfolderBase]: For 11828/11828 co-relation queries the response was YES. [2024-06-20 17:28:09,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 431 events. 211/431 cut-off events. For 11828/11828 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1861 event pairs, 58 based on Foata normal form. 8/438 useless extension candidates. Maximal degree in co-relation 2056. Up to 205 conditions per place. [2024-06-20 17:28:09,981 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 44 selfloop transitions, 24 changer transitions 14/84 dead transitions. [2024-06-20 17:28:09,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 84 transitions, 753 flow [2024-06-20 17:28:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-20 17:28:09,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2024-06-20 17:28:09,983 INFO L175 Difference]: Start difference. First operand has 95 places, 64 transitions, 477 flow. Second operand 8 states and 98 transitions. [2024-06-20 17:28:09,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 84 transitions, 753 flow [2024-06-20 17:28:09,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 84 transitions, 716 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:10,001 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 456 flow [2024-06-20 17:28:10,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=456, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2024-06-20 17:28:10,002 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-06-20 17:28:10,002 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 456 flow [2024-06-20 17:28:10,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:10,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:10,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:10,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:28:10,003 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:10,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1510012076, now seen corresponding path program 3 times [2024-06-20 17:28:10,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:10,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941016] [2024-06-20 17:28:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:10,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:10,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:10,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941016] [2024-06-20 17:28:10,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:10,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:10,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:10,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246211165] [2024-06-20 17:28:10,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:10,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:10,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:10,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:10,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:10,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 456 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:10,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:10,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:10,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:10,875 INFO L124 PetriNetUnfolderBase]: 219/451 cut-off events. [2024-06-20 17:28:10,877 INFO L125 PetriNetUnfolderBase]: For 13426/13426 co-relation queries the response was YES. [2024-06-20 17:28:10,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2348 conditions, 451 events. 219/451 cut-off events. For 13426/13426 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1984 event pairs, 68 based on Foata normal form. 8/458 useless extension candidates. Maximal degree in co-relation 2303. Up to 186 conditions per place. [2024-06-20 17:28:10,885 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 44 selfloop transitions, 26 changer transitions 10/82 dead transitions. [2024-06-20 17:28:10,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 82 transitions, 742 flow [2024-06-20 17:28:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-20 17:28:10,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-20 17:28:10,887 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 456 flow. Second operand 8 states and 97 transitions. [2024-06-20 17:28:10,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 82 transitions, 742 flow [2024-06-20 17:28:10,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 82 transitions, 674 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-20 17:28:10,899 INFO L231 Difference]: Finished difference. Result has 86 places, 56 transitions, 439 flow [2024-06-20 17:28:10,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=86, PETRI_TRANSITIONS=56} [2024-06-20 17:28:10,900 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-20 17:28:10,900 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 56 transitions, 439 flow [2024-06-20 17:28:10,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:10,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:10,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:10,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:28:10,900 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:10,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:10,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1510015796, now seen corresponding path program 4 times [2024-06-20 17:28:10,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:10,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889855216] [2024-06-20 17:28:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:11,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:11,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889855216] [2024-06-20 17:28:11,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889855216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:11,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:11,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:11,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942306042] [2024-06-20 17:28:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:11,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:11,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:11,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:11,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 56 transitions, 439 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:11,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:11,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:11,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:11,693 INFO L124 PetriNetUnfolderBase]: 184/380 cut-off events. [2024-06-20 17:28:11,694 INFO L125 PetriNetUnfolderBase]: For 8219/8219 co-relation queries the response was YES. [2024-06-20 17:28:11,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1801 conditions, 380 events. 184/380 cut-off events. For 8219/8219 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1568 event pairs, 55 based on Foata normal form. 12/391 useless extension candidates. Maximal degree in co-relation 1760. Up to 209 conditions per place. [2024-06-20 17:28:11,696 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 37 selfloop transitions, 26 changer transitions 8/73 dead transitions. [2024-06-20 17:28:11,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 635 flow [2024-06-20 17:28:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-20 17:28:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-06-20 17:28:11,697 INFO L175 Difference]: Start difference. First operand has 86 places, 56 transitions, 439 flow. Second operand 8 states and 90 transitions. [2024-06-20 17:28:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 635 flow [2024-06-20 17:28:11,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 585 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:11,704 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 417 flow [2024-06-20 17:28:11,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=417, PETRI_PLACES=85, PETRI_TRANSITIONS=52} [2024-06-20 17:28:11,704 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2024-06-20 17:28:11,704 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 417 flow [2024-06-20 17:28:11,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-20 17:28:11,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:11,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:11,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:28:11,705 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:11,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:11,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1006786540, now seen corresponding path program 1 times [2024-06-20 17:28:11,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:11,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801393340] [2024-06-20 17:28:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:11,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801393340] [2024-06-20 17:28:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801393340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:12,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:12,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913715628] [2024-06-20 17:28:12,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:12,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:12,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:12,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 52 transitions, 417 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:12,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:12,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:12,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:12,753 INFO L124 PetriNetUnfolderBase]: 159/328 cut-off events. [2024-06-20 17:28:12,754 INFO L125 PetriNetUnfolderBase]: For 5358/5358 co-relation queries the response was YES. [2024-06-20 17:28:12,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 328 events. 159/328 cut-off events. For 5358/5358 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1283 event pairs, 55 based on Foata normal form. 2/329 useless extension candidates. Maximal degree in co-relation 1609. Up to 217 conditions per place. [2024-06-20 17:28:12,756 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 39 selfloop transitions, 22 changer transitions 0/63 dead transitions. [2024-06-20 17:28:12,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 63 transitions, 573 flow [2024-06-20 17:28:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-20 17:28:12,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-20 17:28:12,757 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 417 flow. Second operand 8 states and 80 transitions. [2024-06-20 17:28:12,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 63 transitions, 573 flow [2024-06-20 17:28:12,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 63 transitions, 495 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:28:12,768 INFO L231 Difference]: Finished difference. Result has 84 places, 53 transitions, 397 flow [2024-06-20 17:28:12,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=84, PETRI_TRANSITIONS=53} [2024-06-20 17:28:12,769 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-20 17:28:12,769 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 53 transitions, 397 flow [2024-06-20 17:28:12,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:12,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:12,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:12,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:28:12,770 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:12,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1091486990, now seen corresponding path program 2 times [2024-06-20 17:28:12,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:12,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380157935] [2024-06-20 17:28:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:12,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:13,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:13,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380157935] [2024-06-20 17:28:13,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380157935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:13,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:13,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181806709] [2024-06-20 17:28:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:13,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:13,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:13,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:13,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 53 transitions, 397 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:13,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:13,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:13,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:13,861 INFO L124 PetriNetUnfolderBase]: 163/336 cut-off events. [2024-06-20 17:28:13,861 INFO L125 PetriNetUnfolderBase]: For 5933/5933 co-relation queries the response was YES. [2024-06-20 17:28:13,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 336 events. 163/336 cut-off events. For 5933/5933 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1329 event pairs, 53 based on Foata normal form. 2/337 useless extension candidates. Maximal degree in co-relation 1609. Up to 189 conditions per place. [2024-06-20 17:28:13,864 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 25 changer transitions 0/64 dead transitions. [2024-06-20 17:28:13,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 64 transitions, 555 flow [2024-06-20 17:28:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-20 17:28:13,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913793103448276 [2024-06-20 17:28:13,865 INFO L175 Difference]: Start difference. First operand has 84 places, 53 transitions, 397 flow. Second operand 8 states and 81 transitions. [2024-06-20 17:28:13,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 64 transitions, 555 flow [2024-06-20 17:28:13,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 64 transitions, 507 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:13,876 INFO L231 Difference]: Finished difference. Result has 86 places, 54 transitions, 416 flow [2024-06-20 17:28:13,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=416, PETRI_PLACES=86, PETRI_TRANSITIONS=54} [2024-06-20 17:28:13,876 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-20 17:28:13,876 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 54 transitions, 416 flow [2024-06-20 17:28:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:13,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:13,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:28:13,877 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:13,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1003569382, now seen corresponding path program 3 times [2024-06-20 17:28:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254439113] [2024-06-20 17:28:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:14,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:14,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254439113] [2024-06-20 17:28:14,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254439113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:14,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:14,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634816760] [2024-06-20 17:28:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:14,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:14,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 54 transitions, 416 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:14,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:14,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:14,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:14,797 INFO L124 PetriNetUnfolderBase]: 160/331 cut-off events. [2024-06-20 17:28:14,797 INFO L125 PetriNetUnfolderBase]: For 5988/5988 co-relation queries the response was YES. [2024-06-20 17:28:14,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1634 conditions, 331 events. 160/331 cut-off events. For 5988/5988 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1303 event pairs, 54 based on Foata normal form. 2/332 useless extension candidates. Maximal degree in co-relation 1593. Up to 267 conditions per place. [2024-06-20 17:28:14,800 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 49 selfloop transitions, 16 changer transitions 0/67 dead transitions. [2024-06-20 17:28:14,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 67 transitions, 640 flow [2024-06-20 17:28:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-20 17:28:14,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-20 17:28:14,802 INFO L175 Difference]: Start difference. First operand has 86 places, 54 transitions, 416 flow. Second operand 8 states and 82 transitions. [2024-06-20 17:28:14,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 67 transitions, 640 flow [2024-06-20 17:28:14,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 585 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:14,813 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 423 flow [2024-06-20 17:28:14,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=423, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2024-06-20 17:28:14,814 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2024-06-20 17:28:14,814 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 423 flow [2024-06-20 17:28:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:14,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:14,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:14,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:28:14,815 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:14,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1260077332, now seen corresponding path program 4 times [2024-06-20 17:28:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:14,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854161246] [2024-06-20 17:28:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:14,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:15,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854161246] [2024-06-20 17:28:15,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854161246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:15,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:15,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847261178] [2024-06-20 17:28:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:15,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:15,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:15,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:15,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 423 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:15,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:15,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:15,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:15,966 INFO L124 PetriNetUnfolderBase]: 164/339 cut-off events. [2024-06-20 17:28:15,966 INFO L125 PetriNetUnfolderBase]: For 6591/6591 co-relation queries the response was YES. [2024-06-20 17:28:15,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 339 events. 164/339 cut-off events. For 6591/6591 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1339 event pairs, 55 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 1631. Up to 302 conditions per place. [2024-06-20 17:28:15,968 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 51 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-06-20 17:28:15,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 67 transitions, 593 flow [2024-06-20 17:28:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-20 17:28:15,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-20 17:28:15,973 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 423 flow. Second operand 8 states and 80 transitions. [2024-06-20 17:28:15,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 67 transitions, 593 flow [2024-06-20 17:28:15,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 67 transitions, 562 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:15,984 INFO L231 Difference]: Finished difference. Result has 92 places, 57 transitions, 440 flow [2024-06-20 17:28:15,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=92, PETRI_TRANSITIONS=57} [2024-06-20 17:28:15,984 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2024-06-20 17:28:15,984 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 57 transitions, 440 flow [2024-06-20 17:28:15,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:15,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:15,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:15,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:28:15,985 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:15,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1003576822, now seen corresponding path program 5 times [2024-06-20 17:28:15,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:15,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895071167] [2024-06-20 17:28:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:15,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895071167] [2024-06-20 17:28:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895071167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:16,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:16,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826128785] [2024-06-20 17:28:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:16,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:16,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:16,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:16,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 57 transitions, 440 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:16,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:16,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:16,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:16,929 INFO L124 PetriNetUnfolderBase]: 161/334 cut-off events. [2024-06-20 17:28:16,929 INFO L125 PetriNetUnfolderBase]: For 6529/6529 co-relation queries the response was YES. [2024-06-20 17:28:16,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 334 events. 161/334 cut-off events. For 6529/6529 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1318 event pairs, 53 based on Foata normal form. 2/335 useless extension candidates. Maximal degree in co-relation 1586. Up to 285 conditions per place. [2024-06-20 17:28:16,932 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 48 selfloop transitions, 17 changer transitions 0/67 dead transitions. [2024-06-20 17:28:16,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 67 transitions, 596 flow [2024-06-20 17:28:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-20 17:28:16,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-20 17:28:16,934 INFO L175 Difference]: Start difference. First operand has 92 places, 57 transitions, 440 flow. Second operand 8 states and 80 transitions. [2024-06-20 17:28:16,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 67 transitions, 596 flow [2024-06-20 17:28:16,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 67 transitions, 554 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:16,943 INFO L231 Difference]: Finished difference. Result has 94 places, 57 transitions, 438 flow [2024-06-20 17:28:16,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=94, PETRI_TRANSITIONS=57} [2024-06-20 17:28:16,944 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-06-20 17:28:16,944 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 57 transitions, 438 flow [2024-06-20 17:28:16,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:16,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:16,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:16,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:28:16,945 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:16,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:16,945 INFO L85 PathProgramCache]: Analyzing trace with hash -994372612, now seen corresponding path program 6 times [2024-06-20 17:28:16,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:16,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509209303] [2024-06-20 17:28:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:16,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509209303] [2024-06-20 17:28:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509209303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:17,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:17,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440567189] [2024-06-20 17:28:17,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:17,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:17,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:17,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:17,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 57 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:17,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:17,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:17,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:17,774 INFO L124 PetriNetUnfolderBase]: 158/329 cut-off events. [2024-06-20 17:28:17,774 INFO L125 PetriNetUnfolderBase]: For 6337/6337 co-relation queries the response was YES. [2024-06-20 17:28:17,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 329 events. 158/329 cut-off events. For 6337/6337 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1287 event pairs, 39 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 1520. Up to 290 conditions per place. [2024-06-20 17:28:17,776 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 53 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-06-20 17:28:17,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 67 transitions, 590 flow [2024-06-20 17:28:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 78 transitions. [2024-06-20 17:28:17,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33620689655172414 [2024-06-20 17:28:17,783 INFO L175 Difference]: Start difference. First operand has 94 places, 57 transitions, 438 flow. Second operand 8 states and 78 transitions. [2024-06-20 17:28:17,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 67 transitions, 590 flow [2024-06-20 17:28:17,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 67 transitions, 551 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:17,799 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 427 flow [2024-06-20 17:28:17,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2024-06-20 17:28:17,800 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2024-06-20 17:28:17,800 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 427 flow [2024-06-20 17:28:17,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:17,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:17,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:17,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:28:17,801 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:17,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash 444838371, now seen corresponding path program 1 times [2024-06-20 17:28:17,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:17,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614854897] [2024-06-20 17:28:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:17,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:18,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:18,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614854897] [2024-06-20 17:28:18,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614854897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:18,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:18,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:18,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77214733] [2024-06-20 17:28:18,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:18,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:18,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:18,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:18,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:18,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 427 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:18,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:18,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:18,888 INFO L124 PetriNetUnfolderBase]: 166/349 cut-off events. [2024-06-20 17:28:18,888 INFO L125 PetriNetUnfolderBase]: For 7529/7529 co-relation queries the response was YES. [2024-06-20 17:28:18,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 349 events. 166/349 cut-off events. For 7529/7529 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1432 event pairs, 50 based on Foata normal form. 6/354 useless extension candidates. Maximal degree in co-relation 1554. Up to 208 conditions per place. [2024-06-20 17:28:18,890 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 40 selfloop transitions, 21 changer transitions 7/70 dead transitions. [2024-06-20 17:28:18,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 70 transitions, 595 flow [2024-06-20 17:28:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-20 17:28:18,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-20 17:28:18,893 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 427 flow. Second operand 9 states and 90 transitions. [2024-06-20 17:28:18,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 70 transitions, 595 flow [2024-06-20 17:28:18,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 70 transitions, 543 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:28:18,905 INFO L231 Difference]: Finished difference. Result has 96 places, 54 transitions, 403 flow [2024-06-20 17:28:18,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=96, PETRI_TRANSITIONS=54} [2024-06-20 17:28:18,905 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-20 17:28:18,905 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 54 transitions, 403 flow [2024-06-20 17:28:18,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:18,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:18,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:18,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:28:18,906 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:18,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:18,906 INFO L85 PathProgramCache]: Analyzing trace with hash -696361745, now seen corresponding path program 2 times [2024-06-20 17:28:18,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:18,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123135296] [2024-06-20 17:28:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:18,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:19,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:19,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123135296] [2024-06-20 17:28:19,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123135296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:19,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:19,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:19,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255721060] [2024-06-20 17:28:19,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:19,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:19,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:19,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 54 transitions, 403 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:19,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:19,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:19,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:20,041 INFO L124 PetriNetUnfolderBase]: 138/288 cut-off events. [2024-06-20 17:28:20,041 INFO L125 PetriNetUnfolderBase]: For 6275/6275 co-relation queries the response was YES. [2024-06-20 17:28:20,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 288 events. 138/288 cut-off events. For 6275/6275 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1097 event pairs, 37 based on Foata normal form. 6/293 useless extension candidates. Maximal degree in co-relation 1210. Up to 141 conditions per place. [2024-06-20 17:28:20,043 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 29 selfloop transitions, 12 changer transitions 23/66 dead transitions. [2024-06-20 17:28:20,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 66 transitions, 561 flow [2024-06-20 17:28:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-20 17:28:20,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913793103448276 [2024-06-20 17:28:20,045 INFO L175 Difference]: Start difference. First operand has 96 places, 54 transitions, 403 flow. Second operand 8 states and 81 transitions. [2024-06-20 17:28:20,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 66 transitions, 561 flow [2024-06-20 17:28:20,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 66 transitions, 478 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-20 17:28:20,054 INFO L231 Difference]: Finished difference. Result has 92 places, 39 transitions, 257 flow [2024-06-20 17:28:20,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=92, PETRI_TRANSITIONS=39} [2024-06-20 17:28:20,055 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2024-06-20 17:28:20,055 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 39 transitions, 257 flow [2024-06-20 17:28:20,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:20,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:20,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:28:20,056 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:20,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash -256776425, now seen corresponding path program 3 times [2024-06-20 17:28:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:20,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678144517] [2024-06-20 17:28:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:20,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:20,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:20,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678144517] [2024-06-20 17:28:20,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678144517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:20,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745092858] [2024-06-20 17:28:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:20,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:21,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:21,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 39 transitions, 257 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:21,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:21,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:21,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:21,166 INFO L124 PetriNetUnfolderBase]: 96/214 cut-off events. [2024-06-20 17:28:21,166 INFO L125 PetriNetUnfolderBase]: For 6137/6137 co-relation queries the response was YES. [2024-06-20 17:28:21,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 214 events. 96/214 cut-off events. For 6137/6137 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 738 event pairs, 35 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 898. Up to 113 conditions per place. [2024-06-20 17:28:21,168 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 20 selfloop transitions, 7 changer transitions 24/53 dead transitions. [2024-06-20 17:28:21,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 53 transitions, 393 flow [2024-06-20 17:28:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-20 17:28:21,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-20 17:28:21,173 INFO L175 Difference]: Start difference. First operand has 92 places, 39 transitions, 257 flow. Second operand 9 states and 87 transitions. [2024-06-20 17:28:21,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 53 transitions, 393 flow [2024-06-20 17:28:21,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 53 transitions, 353 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-20 17:28:21,181 INFO L231 Difference]: Finished difference. Result has 76 places, 27 transitions, 172 flow [2024-06-20 17:28:21,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=172, PETRI_PLACES=76, PETRI_TRANSITIONS=27} [2024-06-20 17:28:21,182 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2024-06-20 17:28:21,182 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 27 transitions, 172 flow [2024-06-20 17:28:21,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:21,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:21,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:21,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:28:21,183 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:21,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:21,183 INFO L85 PathProgramCache]: Analyzing trace with hash -407460525, now seen corresponding path program 4 times [2024-06-20 17:28:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:21,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054509380] [2024-06-20 17:28:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:22,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:22,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054509380] [2024-06-20 17:28:22,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054509380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:22,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:22,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:28:22,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985437398] [2024-06-20 17:28:22,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:22,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:28:22,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:28:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:28:22,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:22,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 27 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:22,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:22,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:22,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:22,361 INFO L124 PetriNetUnfolderBase]: 78/175 cut-off events. [2024-06-20 17:28:22,361 INFO L125 PetriNetUnfolderBase]: For 3267/3267 co-relation queries the response was YES. [2024-06-20 17:28:22,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 175 events. 78/175 cut-off events. For 3267/3267 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 581 event pairs, 34 based on Foata normal form. 6/181 useless extension candidates. Maximal degree in co-relation 683. Up to 114 conditions per place. [2024-06-20 17:28:22,362 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 18 selfloop transitions, 6 changer transitions 14/40 dead transitions. [2024-06-20 17:28:22,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 40 transitions, 279 flow [2024-06-20 17:28:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-06-20 17:28:22,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31417624521072796 [2024-06-20 17:28:22,363 INFO L175 Difference]: Start difference. First operand has 76 places, 27 transitions, 172 flow. Second operand 9 states and 82 transitions. [2024-06-20 17:28:22,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 40 transitions, 279 flow [2024-06-20 17:28:22,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 40 transitions, 241 flow, removed 9 selfloop flow, removed 16 redundant places. [2024-06-20 17:28:22,365 INFO L231 Difference]: Finished difference. Result has 59 places, 24 transitions, 130 flow [2024-06-20 17:28:22,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=130, PETRI_PLACES=59, PETRI_TRANSITIONS=24} [2024-06-20 17:28:22,365 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 31 predicate places. [2024-06-20 17:28:22,366 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 24 transitions, 130 flow [2024-06-20 17:28:22,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:22,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:22,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:22,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:28:22,366 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:22,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash -760779437, now seen corresponding path program 5 times [2024-06-20 17:28:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:22,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498864273] [2024-06-20 17:28:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:22,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:23,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:23,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498864273] [2024-06-20 17:28:23,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498864273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:23,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:23,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:23,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137433129] [2024-06-20 17:28:23,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:23,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:23,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:23,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:23,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:23,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 24 transitions, 130 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 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) [2024-06-20 17:28:23,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:23,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:23,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:23,283 INFO L124 PetriNetUnfolderBase]: 51/118 cut-off events. [2024-06-20 17:28:23,284 INFO L125 PetriNetUnfolderBase]: For 751/751 co-relation queries the response was YES. [2024-06-20 17:28:23,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 118 events. 51/118 cut-off events. For 751/751 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 308 event pairs, 16 based on Foata normal form. 6/124 useless extension candidates. Maximal degree in co-relation 380. Up to 55 conditions per place. [2024-06-20 17:28:23,284 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 16 selfloop transitions, 4 changer transitions 14/36 dead transitions. [2024-06-20 17:28:23,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 36 transitions, 224 flow [2024-06-20 17:28:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 80 transitions. [2024-06-20 17:28:23,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3065134099616858 [2024-06-20 17:28:23,286 INFO L175 Difference]: Start difference. First operand has 59 places, 24 transitions, 130 flow. Second operand 9 states and 80 transitions. [2024-06-20 17:28:23,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 36 transitions, 224 flow [2024-06-20 17:28:23,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 36 transitions, 200 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 17:28:23,287 INFO L231 Difference]: Finished difference. Result has 53 places, 20 transitions, 97 flow [2024-06-20 17:28:23,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=97, PETRI_PLACES=53, PETRI_TRANSITIONS=20} [2024-06-20 17:28:23,287 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-20 17:28:23,288 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 20 transitions, 97 flow [2024-06-20 17:28:23,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 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) [2024-06-20 17:28:23,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:23,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:23,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:28:23,288 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 17:28:23,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1509954145, now seen corresponding path program 6 times [2024-06-20 17:28:23,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:23,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989784870] [2024-06-20 17:28:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:23,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989784870] [2024-06-20 17:28:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989784870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:24,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:28:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522792470] [2024-06-20 17:28:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:28:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:28:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:28:24,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-20 17:28:24,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 20 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:24,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:24,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-20 17:28:24,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:24,464 INFO L124 PetriNetUnfolderBase]: 22/59 cut-off events. [2024-06-20 17:28:24,464 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-20 17:28:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 59 events. 22/59 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 1 based on Foata normal form. 6/65 useless extension candidates. Maximal degree in co-relation 156. Up to 24 conditions per place. [2024-06-20 17:28:24,464 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2024-06-20 17:28:24,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 26 transitions, 135 flow [2024-06-20 17:28:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-06-20 17:28:24,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2681992337164751 [2024-06-20 17:28:24,465 INFO L175 Difference]: Start difference. First operand has 53 places, 20 transitions, 97 flow. Second operand 9 states and 70 transitions. [2024-06-20 17:28:24,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 26 transitions, 135 flow [2024-06-20 17:28:24,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 26 transitions, 111 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-20 17:28:24,466 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2024-06-20 17:28:24,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2024-06-20 17:28:24,466 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2024-06-20 17:28:24,467 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2024-06-20 17:28:24,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:24,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 17:28:24,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 17:28:24,470 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 17:28:24,470 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 17:28:24,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:28:24,470 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:24,473 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 17:28:24,473 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 17:28:24,476 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 17:28:24,477 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 17:28:24,477 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 05:28:24 BasicIcfg [2024-06-20 17:28:24,477 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 17:28:24,478 INFO L158 Benchmark]: Toolchain (without parser) took 44452.61ms. Allocated memory was 157.3MB in the beginning and 809.5MB in the end (delta: 652.2MB). Free memory was 79.9MB in the beginning and 309.6MB in the end (delta: -229.7MB). Peak memory consumption was 424.3MB. Max. memory is 16.1GB. [2024-06-20 17:28:24,478 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 157.3MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 17:28:24,478 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 157.3MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 17:28:24,479 INFO L158 Benchmark]: CACSL2BoogieTranslator took 669.25ms. Allocated memory is still 157.3MB. Free memory was 79.8MB in the beginning and 103.3MB in the end (delta: -23.5MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2024-06-20 17:28:24,479 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.71ms. Allocated memory is still 157.3MB. Free memory was 103.3MB in the beginning and 100.0MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 17:28:24,479 INFO L158 Benchmark]: Boogie Preprocessor took 89.43ms. Allocated memory is still 157.3MB. Free memory was 100.0MB in the beginning and 97.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 17:28:24,479 INFO L158 Benchmark]: RCFGBuilder took 770.37ms. Allocated memory was 157.3MB in the beginning and 197.1MB in the end (delta: 39.8MB). Free memory was 97.0MB in the beginning and 163.2MB in the end (delta: -66.2MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. [2024-06-20 17:28:24,480 INFO L158 Benchmark]: TraceAbstraction took 42830.72ms. Allocated memory was 197.1MB in the beginning and 809.5MB in the end (delta: 612.4MB). Free memory was 162.1MB in the beginning and 309.6MB in the end (delta: -147.5MB). Peak memory consumption was 464.9MB. Max. memory is 16.1GB. [2024-06-20 17:28:24,481 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 157.3MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.18ms. Allocated memory is still 157.3MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 669.25ms. Allocated memory is still 157.3MB. Free memory was 79.8MB in the beginning and 103.3MB in the end (delta: -23.5MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.71ms. Allocated memory is still 157.3MB. Free memory was 103.3MB in the beginning and 100.0MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 89.43ms. Allocated memory is still 157.3MB. Free memory was 100.0MB in the beginning and 97.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 770.37ms. Allocated memory was 157.3MB in the beginning and 197.1MB in the end (delta: 39.8MB). Free memory was 97.0MB in the beginning and 163.2MB in the end (delta: -66.2MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. * TraceAbstraction took 42830.72ms. Allocated memory was 197.1MB in the beginning and 809.5MB in the end (delta: 612.4MB). Free memory was 162.1MB in the beginning and 309.6MB in the end (delta: -147.5MB). Peak memory consumption was 464.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 793]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 794]: 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, 46 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: 42.7s, OverallIterations: 43, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 11.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1989 SdHoareTripleChecker+Valid, 6.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1598 mSDsluCounter, 1718 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1443 mSDsCounter, 393 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8702 IncrementalHoareTripleChecker+Invalid, 9095 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 393 mSolverCounterUnsat, 275 mSDtfsCounter, 8702 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 349 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=640occurred in iteration=21, InterpolantAutomatonStates: 315, 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, 0.5s SatisfiabilityAnalysisTime, 30.2s InterpolantComputationTime, 602 NumberOfCodeBlocks, 602 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 559 ConstructedInterpolants, 0 QuantifiedInterpolants, 22973 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 43 InterpolantComputations, 43 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 17:28:24,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE